HPE FlexFabric 7900 Series User manual
HPE FlexFabric 7900 Switch Series
Fundamentals
Configuration Guide
Part number: 5998-8230R
Software version: Release 213x
Document version: 6W101-20151113
© Copyright 2015 Hewlett Packard Enterprise Development LP
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Acknowledgments
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Contents
Contents··········································································································· i
Using the CLI ·································································································· 1
CLI views ···························································································································································1
Entering system view from user view·········································································································2
Returning to the upper-level view from any view ·······················································································2
Returning to user view ·······························································································································2
Accessing the CLI online help····························································································································2
Using the undo form of a command···················································································································3
Entering a command··········································································································································3
Editing a command line······························································································································4
Entering a text or string type value for an argument ··················································································4
Abbreviating commands·····························································································································4
Configuring and using command aliases ···································································································5
Configuring and using command hotkeys ··································································································6
Enabling redisplaying entered-but-not-submitted commands ····································································7
Understanding command-line error messages ··································································································7
Using the command history function··················································································································7
Controlling the CLI output ··································································································································8
Pausing between screens of output ···········································································································8
Numbering each output line from a display command ···············································································9
Filtering the output from a display command ···························································································10
Saving the output from a display command to a file ················································································12
Viewing and managing the output from a display command effectively···················································13
Saving the running configuration ·····················································································································14
Login overview ······························································································ 15
Logging in through the console port for the first device access ···················· 16
Logging in to the CLI····················································································· 19
CLI overview ····················································································································································19
User lines ·················································································································································19
Login authentication modes ·····················································································································19
User roles·················································································································································20
FIPS compliance··············································································································································20
Logging in through the console port locally······································································································20
Disabling authentication for console login································································································21
Configuring password authentication for console login············································································22
Configuring scheme authentication for console login···············································································22
Configuring common AUX line settings····································································································23
Logging in through Telnet ································································································································25
Configuring Telnet login on the device·····································································································25
Using the device to log in to a Telnet server ····························································································31
Logging in through SSH···································································································································31
Configuring SSH login on the device ·······································································································31
Using the device to log in to an SSH server·····························································································33
Displaying and maintaining CLI login···············································································································33
Accessing the device through SNMP···························································· 35
Configuring SNMPv3 access ···························································································································35
Configuring SNMPv1 or SNMPv2c access ······································································································36
Controlling user access················································································· 37
FIPS compliance··············································································································································37
Controlling Telnet/SSH logins ··························································································································37
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Configuration procedures·························································································································37
Configuration example ·····························································································································37
Controlling SNMP access ································································································································38
Configuration procedure···························································································································38
Configuration example ·····························································································································39
Configuring command authorization ················································································································40
Configuration procedure···························································································································40
Configuration example ·····························································································································41
Configuring RBAC························································································· 45
Overview ··························································································································································45
Permission assignment ····························································································································45
Assigning user roles·································································································································47
FIPS compliance··············································································································································48
Configuration task list·······································································································································48
Creating user roles···········································································································································48
Configuring user role rules·······························································································································49
Configuration restrictions and guidelines ·································································································49
Configuration procedure···························································································································49
Configuring feature groups ······························································································································50
Configuring resource access policies ··············································································································50
Configuring the user role interface policy·································································································51
Configuring the user role VLAN policy ·····································································································51
Configuring the user role VPN instance policy·························································································51
Assigning user roles·········································································································································52
Enabling the default user role feature ······································································································52
Assigning user roles to remote AAA authentication users ·······································································52
Assigning user roles to local AAA authentication users ···········································································53
Assigning user roles to non-AAA authentication users on user lines·······················································53
Configuring temporary user role authorization·································································································54
Configuration guidelines···························································································································54
Configuring user role authentication ········································································································55
Obtaining temporary user role authorization ····························································································56
Displaying and maintaining RBAC settings······································································································56
RBAC configuration examples ·························································································································56
RBAC configuration example for local AAA authentication users ····························································56
RBAC configuration example for RADIUS authentication users ······························································58
RBAC configuration example for HWTACACS authentication users ·······················································61
Troubleshooting RBAC ····································································································································64
Local users have more access permissions than intended······································································64
Login attempts by RADIUS users always fail···························································································65
Configuring FTP···························································································· 66
FIPS compliance··············································································································································66
Using the device as an FTP server··················································································································66
Configuring basic parameters ··················································································································66
Configuring authentication and authorization···························································································67
Manually releasing FTP connections ·······································································································67
Displaying and maintaining the FTP server ·····························································································68
FTP server configuration example in standalone mode···········································································68
FTP server configuration example in IRF mode·······················································································69
Using the device as an FTP client ···················································································································71
Establishing an FTP connection···············································································································71
Managing directories on the FTP server ··································································································72
Working with files on the FTP server ·······································································································72
Changing to another user account ···········································································································73
Maintaining and troubleshooting the FTP connection ··············································································73
Terminating the FTP connection ··············································································································74
Displaying command help information ·····································································································74
Displaying and maintaining FTP client·············································································································74
FTP client configuration example in standalone mode ····················································································74
FTP client configuration example in IRF mode ································································································76
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Configuring TFTP·························································································· 78
FIPS compliance··············································································································································78
Configuring the device as an IPv4 TFTP client································································································78
Managing the file system ·············································································· 79
Storage medium naming rules ·························································································································79
File name formats ············································································································································79
Managing files··················································································································································81
Displaying file information ························································································································81
Displaying the contents of a text file·········································································································81
Renaming a file ········································································································································81
Copying a file ···········································································································································81
Moving a file ·············································································································································82
Compressing/decompressing a file ··········································································································82
Archiving/extracting files ··························································································································82
Deleting/restoring a file ····························································································································82
Deleting files from the recycle bin ············································································································83
Calculating the digest of a file ··················································································································83
Managing directories········································································································································83
Displaying directory information ···············································································································84
Displaying the current working directory ··································································································84
Changing the current working directory ···································································································84
Creating a directory··································································································································84
Removing a directory ·······························································································································84
Managing storage media ·································································································································85
Repairing a storage medium ····················································································································85
Formatting a storage medium ··················································································································85
Mounting or unmounting a storage medium·····························································································86
Partitioning a USB disk ····························································································································86
Setting the operation mode for files and folders ······························································································87
Managing configuration files ········································································· 88
Overview ··························································································································································88
Configuration types ··································································································································88
Startup configuration loading process······································································································88
Configuration file formats ·························································································································89
Startup configuration file selection ···········································································································90
Configuration file content organization and format···················································································90
FIPS compliance··············································································································································90
General configuration restrictions and guidelines ····························································································91
Enabling configuration encryption····················································································································91
Displaying configuration differences ················································································································91
Saving the running configuration ·····················································································································92
Restrictions and guidelines ······················································································································92
Using different methods to save the running configuration ······································································93
Configuring configuration commit delay···········································································································94
Specifying a next-startup configuration file ······································································································95
Backing up the main next-startup configuration file to a TFTP server ·····························································96
Restoring the main next-startup configuration file from a TFTP server ···························································96
Deleting a next-startup configuration file··········································································································97
Displaying and maintaining configuration files ·································································································97
Upgrading software······················································································· 99
Overview ··························································································································································99
Software types ·········································································································································99
Software file naming conventions ············································································································99
Comware image redundancy and loading procedure ············································································100
System startup process··························································································································100
Upgrade methods ··········································································································································101
Upgrade procedure summary ························································································································102
Preparing for the upgrade ······························································································································102
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Preloading the BootWare image to BootWare ·······························································································102
Specifying startup images and completing the upgrade ················································································103
In standalone mode································································································································103
In IRF mode ···········································································································································105
Restoring or downgrading the BootWare image ····························································································107
Enabling software synchronization from the active MPU to the standby MPU at startup ······························107
Displaying and maintaining software image settings ·····················································································108
Software upgrade examples ··························································································································108
Software upgrade example for the HPE 7904 or HPE 7904 TAA switch in standalone mode···············108
Software upgrade example for the HPE 7910 or HPE 7910 TAA switch in standalone mode···············109
Software upgrade example for the HPE 7904 or HPE 7904 TAA IRF fabric ·········································110
Software upgrade example for the HPE 7910 or HPE 7910 TAA IRF fabric ·········································111
Performing an ISSU ···················································································· 113
Overview ························································································································································113
ISSU restrictions ············································································································································113
ISSU flow chart ··············································································································································114
Preparing for ISSU·········································································································································114
Identifying availability of ISSU················································································································114
Verifying the device operating status ·····································································································114
Preparing the upgrade images···············································································································115
Verifying network and feature status······································································································115
Understanding ISSU guidelines ·············································································································115
Logging in to the device through the console port ·················································································116
Adjusting and saving the running configuration ·····················································································117
Performing an ISSU ·······································································································································117
Installing patch images ··································································································································118
Uninstalling patch images ······························································································································118
Displaying and maintaining ISSU···················································································································118
ISSU example ················································································································································119
Using Python······························································································· 122
Entering the Python shell ·······················································································································122
Executing a Python script·······················································································································122
Exiting the Python shell··································································································································122
Python usage example ··································································································································122
Comware V7 extended Python API····························································· 124
Importing and using the Comware V7 extended Python API·········································································124
Comware V7 extended Python API functions ································································································124
CLI class ················································································································································124
Transfer class·········································································································································126
API get_self_slot ····································································································································127
API get_standby_slot ·····························································································································127
API get_slot_range ········································································································································128
get_slot_range ·······································································································································128
API get_slot_info············································································································································129
get_slot_info···········································································································································129
Managing the device··················································································· 130
Configuring the device name ·························································································································130
Setting the system time··································································································································130
Specifying the system time source ················································································································131
Enabling displaying the copyright statement··································································································131
Configuring banners·······································································································································132
Banner types ··········································································································································132
Banner input modes ·······························································································································132
Configuration procedure·························································································································133
Setting the system operating mode ···············································································································133
Setting the packet statistics collection mode ·································································································134
Rebooting the device ·····································································································································135
Configuration guidelines·························································································································135
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Rebooting devices immediately at the CLI·····························································································135
Scheduling a device reboot····················································································································135
Scheduling a task···········································································································································136
Configuration guidelines·························································································································136
Configuration procedure·························································································································136
Schedule configuration example ············································································································138
Disabling password recovery capability ·········································································································141
Setting the port status detection timer ···········································································································141
Monitoring the CPU usage·····························································································································142
Setting memory thresholds ····························································································································142
Setting temperature alarm thresholds············································································································144
Isolating a switching fabric module ················································································································145
Configuring global on-demand diagnostics····································································································146
Verifying and diagnosing transceiver modules ······························································································146
Verifying transceiver modules ················································································································146
Diagnosing transceiver modules ············································································································147
Configuring user process maintenance parameters ······················································································147
Displaying and maintaining device management configuration ·····································································148
Standalone mode ···································································································································148
IRF mode ···············································································································································149
Configuring MDCs······················································································· 151
Overview ························································································································································151
MDC applications ···································································································································151
Default MDC and non-default MDCs······································································································151
Feature and software version compatibility····································································································152
Licensing requirements··································································································································152
MDC configuration task list ····························································································································152
Creating an MDC ···········································································································································152
Assigning hardware resources to MDCs········································································································153
Assigning physical interfaces and LPUs to MDCs ·················································································153
Specifying a CPU weight for an MDC ····································································································156
Specifying a memory space percentage for an MDC·············································································157
Starting an MDC ············································································································································157
Accessing an MDC ········································································································································157
Displaying and maintaining MDCs ·················································································································158
MDC configuration examples·························································································································158
MDC configuration example in standalone mode ··················································································158
MDC configuration example in IRF mode ······························································································162
Configuring preprovisioning ········································································ 168
Overview ························································································································································168
Feature and software version compatibility····································································································168
Enabling preprovisioning································································································································168
Displaying and maintaining preprovisioned settings ······················································································169
Using automatic configuration····································································· 170
Understanding automatic configuration ·········································································································170
Overall automatic configuration process ································································································170
Interface selection process ····················································································································172
Automatic-configuration parameter acquisition process ········································································173
Configuration file acquisition process·····································································································173
Deploying and configuring servers for automatic configuration ·····································································175
DHCP server configuration guidelines ···································································································175
HTTP server configuration guidelines ····································································································176
TFTP server configuration guidelines ····································································································176
Automatic IRF setup example························································································································176
Document conventions and icons ······························································· 179
Conventions ···················································································································································179
Network topology icons··································································································································180
vi
Support and other resources ······································································ 181
Accessing Hewlett Packard Enterprise Support ····························································································181
Accessing updates·········································································································································181
Websites ················································································································································182
Customer self repair·······························································································································182
Remote support······································································································································182
Documentation feedback ·······················································································································182
Index ··········································································································· 183
1
Using the CLI
At the command-line interface (CLI), you can enter text commands to configure, manage, and
monitor your device.
Figure 1 CLI example
You can use different methods to log in to the CLI, including through the console port, Telnet, and
SSH. For more information about login methods, see "Login overview."
CLI views
Commands are grouped in different views by function. To use a command, you must enter its view.
CLI views are hierarchically organized, as shown in Figure 2. Each view has a unique prompt, from
which you can identify where you are and what you can do. For example, the prompt
[Sysname-vlan100] shows that you are in VLAN 100 view and can configure attributes for that
VLAN.
Figure 2 CLI views
You are placed in user view immediately after you log in to the CLI. The user view prompt is
<Device-name>, where Device-name indicates the device name. The device name is Sysname by
default. You can change it by using the sysname command.
In user view, you can do the following:
•Perform basic operations including display, debug, file management, FTP, Telnet, clock setting,
and reboot.
•Enter system view. The system view prompt is [Device-name].
In system view, you can do the following:
VLAN view
Interface
view
System
view
User view
User line
view
Local user
view
2
•Configure global settings (such as the daylight saving time, banners, and hotkeys) and some
functions.
•Enter different function views. For example, you can enter interface view to configure interface
parameters, enter VLAN view to add ports to the VLAN, and enter user line view to configure
login user attributes.
A function view might have child views.
To display all commands available in a view, enter a question mark (?) at the view prompt.
Entering system view from user view
Task Command
Enter system view. system-view
Returning to the upper-level view from any view
Task Command
Return to the upper-level view from any view. quit
Executing the quit command in user view terminates your connection to the device.
In public key view, use the peer-public-key end command to return to system view.
Returning to user view
To return directly to user view from any other view, use the return command or press Ctrl+Z.
Task Command
Return directly to user view. return
Accessing the CLI online help
The CLI online help is context sensitive. Enter a question mark at any prompt or in any position of a
command to display all available options.
To access the CLI online help, use one of the following methods:
•Enter a question mark at a view prompt to display the first keyword of every command available
in the view. For example:
<Sysname> ?
User view commands:
access-list acl
archive Archive configuration
backup Backup the startup configuration file to a TFTP server
bash
blade
boot-loader Software image file management
...
3
•Enter a space and a question mark after a command keyword to display all available,
subsequent keywords and arguments.
{If the question mark is in the place of a keyword, the CLI displays all possible keywords,
each with a brief description. For example:
<Sysname> terminal ?
debugging Enable to display debugging logs on the current terminal
logging Display logs on the current terminal
monitor Enable to display logs on the current terminal
{If the question mark is in the place of an argument, the CLI displays the description of the
argument. For example:
<Sysname> system-view
[Sysname] interface vlan-interface ?
<1-4094> Vlan-interface interface number
[Sysname] interface vlan-interface 1 ?
<cr>
[Sysname] interface vlan-interface 1
<1-4094> is the value range for the argument. <cr> indicates that the command is complete
and you can press Enter to execute the command.
•Enter an incomplete keyword string followed by a question mark to display all keywords starting
with that string. For example:
<Sysname> f?
fdisk
fixdisk
format
free
ftp
<Sysname> display ftp?
ftp
ftp-server
ftp-user
Using the undo form of a command
Most configuration commands have an undo form for the following:
•Canceling a configuration.
•Restoring the default.
•Disabling a feature.
For example, the info-center enable command enables the information center. The undo
info-center enable command disables the information center.
Entering a command
When you enter a command, you can do the following:
•Use keys or hotkeys to edit the command line.
•Use abbreviated keywords or keyword aliases.
4
Editing a command line
To edit a command line, use the keys listed in Table 1 or the hotkeys listed in Table 3. When you are
finished, you can press Enter to execute the command.
The total length of a command line cannot exceed 512 characters, including spaces and special
characters.
Table 1 Command line editing keys
Keys Function
Common keys
If the edit buffer is not full, pressing a common key inserts a character at
the position of the cursor and moves the cursor to the right. The edit buffer
can store up to 511 characters. Unless the buffer is full, all common
characters that you enter before pressing Enter are saved in the edit buffer.
Backspace Deletes the character to the left of the cursor and moves the cursor back
one character.
Left arrow key (←) Moves the cursor one character to the left.
Right arrow key (→) Moves the cursor one character to the right.
Up arrow key (↑) Gets the previous history command.
Down arrow key (↓) Gets the next history command.
Tab
If you press Tab after entering part of a keyword, the system automatically
completes the keyword:
•If a unique match is found, the system displays the complete keyword.
•If there is more than one match, press Tab multiple times to pick the
keyword you want to enter.
•If there is no match, the system does not modify what you entered but
displays it again in the next line.
Entering a text or string type value for an argument
A text type argument value can contain printable characters other than the question mark (?).
A string type argument value can contain printable characters other than the following:
•Question mark (?).
•Quotation mark (").
•Backward slash (\).
•Space.
A specific argument might have more requirements. For more information, see the relevant
command reference.
To enter a printable character, you can enter the character or its ASCII code (in the range of 32 to
126).
Abbreviating commands
You can enter a command line quickly by entering incomplete keywords that uniquely identify the
complete command. In user view, for example, commands starting with an sinclude startup
saved-configuration and system-view. To enter the command system-view, you only need to
type sy. To enter the command startup saved-configuration, type st s.
You can also press Tab to complete an incomplete keyword.
5
Configuring and using command aliases
You can configure an alias for a command or the starting keywords of commands, and use the alias
to execute the command or commands.
For example, if you configure the alias siprt for display ip routing-table, you can enter siprt to
execute the display ip routing-table command. If you configure the alias ship for display ip, you
can use ship to execute all commands starting with display ip:
•Enter ship routing-table to execute the display ip routing-table command.
•Enter ship interface to execute the display ip interface command.
Usage guidelines
After you successfully execute a command by using an alias, the system saves the command,
instead of the alias, to the running configuration.
The command string represented by an alias can include up to nine parameters. Each parameter
starts with the dollar sign ($) and a sequence number in the range of 1 to 9. For example, you can
configure the alias shinc for the display $1 | include $2 command. Then, you can enter shinc
hotkey CTRL_C to execute the display hotkey | include CTRL_C command.
To use an alias for a command that has parameters, you must specify a value for each parameter. If
you fail to do so, the system displays a command incomplete error message and the command string
represented by the alias.
The system defines a set of command aliases, as listed in Table 2.
Table 2 System-defined command aliases
Alias Command string
access-list acl
end return
erase delete
exit quit
hostname sysname
logging info-center
no undo
show display
write save
Configuration procedure
To configure a command alias:
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure a command alias. alias alias command By default, the system defines the
command aliases listed in Table 2.
3. (Optional.) Display command
aliases. display alias [alias ]This command is available in any
view.
6
Configuring and using command hotkeys
The system defines the hotkeys shown in Table 3 and provides five configurable command hotkeys.
Pressing a command hotkey is the same as entering a command.
If a hotkey is also defined by the terminal software you are using to interact with the device, the
terminal software definition takes effect.
To configure a command hotkey:
Step Command Remarks
4. Enter system view. system-view N/A
5. Assign a
command to a
hotkey.
hotkey { ctrl_g | ctrl_l | ctrl_o |
ctrl_t | ctrl_u } command
By default:
•Ctrl+G is assigned the display
current-configuration command.
•Ctrl+L is assigned the display ip
routing-table command.
•Ctrl+O is assigned the undo debugging
all command.
•No command is assigned to Ctrl+T or
Ctrl+U.
6. (Optional.) Display
hotkeys. display hotkey Available in any view.
Table 3 System-reserved hotkeys
Hotkey Function
Ctrl+A Moves the cursor to the beginning of a line.
Ctrl+B Moves the cursor one character to the left.
Ctrl+C Stops the current command.
Ctrl+D Deletes the character at the cursor.
Ctrl+E Moves the cursor to the end of a line.
Ctrl+F Moves the cursor one character to the right.
Ctrl+H Deletes the character to the left of the cursor.
Ctrl+K Aborts the connection request.
Ctrl+R Redisplays the current line.
Ctrl+V Pastes text from the clipboard.
Ctrl+W Deletes the word to the left of the cursor.
Ctrl+X Deletes all characters to the left of the cursor.
Ctrl+Y Deletes all characters to the right of the cursor.
Ctrl+Z Returns to user view.
Ctrl+] Terminates the current connection.
Esc+B Moves the cursor back one word.
Esc+D Deletes all characters from the cursor to the end of the word.
Esc+F Moves the cursor forward one word.
7
Enabling redisplaying entered-but-not-submitted commands
Your input might be interrupted by system information output. If redisplaying
entered-but-not-submitted commands is enabled, the system redisplays your input after finishing the
output. You can then continue entering the command line.
To enable redisplaying entered-but-not-submitted commands:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable redisplaying
entered-but-not-sub
mitted commands. info-center synchronous
By default, the system does not redisplay
entered-but-not-submitted commands.
For more information about this command, see
Network Management and Monitoring
Command Reference.
Understanding command-line error messages
After you press Enter to submit a command, the command line interpreter examines the command
syntax.
•If the command passes syntax check, the CLI executes the command.
•If the command fails syntax check, the CLI displays an error message.
Table 4 Common command-line error messages
Error message Cause
% Unrecognized command found at '^' position. The keyword in the marked position is invalid.
% Incomplete command found at '^' position. One or more required keywords or arguments are
missing.
% Ambiguous command found at '^' position. The entered character sequence matches more than
one command.
% Too many parameters. The entered character sequence contains excessive
keywords or arguments.
% Wrong parameter found at '^' position. The argument in the marked position is invalid.
Using the command history function
The system automatically saves commands successfully executed by a login user to two command
history buffers:
•Command history buffer for the user line.
•Command history buffer for all user lines.
8
Table 5 Comparison between the two types of command history buffers
Item Command history buffer for a user
line Command history buffer for
all user lines
What kind of
commands are
stored in the buffer?
Commands successfully executed by the
current user of the user line.
Commands successfully executed
by all login users.
Cleared when the
user logs out? Yes. No.
How to view buffered
commands?
Use the display history-command
command.
Use the display history-command all
command.
How to call buffered
commands?
•In Windows 200xor Windows XP
HyperTerminal or Telnet, use the up or
down arrow key (↑or ↓) to navigate to
a command in the buffer and press
Enter to execute the command again.
•In Windows 9xHyperTerminal, use
Ctrl+P and Ctrl+N to do so.
You cannot call buffered commands.
How to set the buffer
size?
Use the history-command max-size
size-value command in user line view to set
the buffer size.
By default, the buffer can store up to 10
commands.
You cannot set the buffer size.
By default, the buffer can store up to
1024 commands.
How to disable the
buffer?
Setting the buffer size to 0 disables the
buffer. You cannot disable the buffer.
The system follows these rules when buffering commands:
•Buffering a command in the exact format in which the command was entered. For example, if
you enter an incomplete command, the buffered command is also incomplete. If you enter a
command with a command keyword alias, the buffered command also uses the alias.
•If you enter a command in the same format multiple times in succession, the system buffers the
command only once. If you enter a command in different formats multiple times, the system
buffers each command format. For example, display cu and display current-configuration are
buffered as two entries but successive repetitions of display cu create only one entry.
•To buffer a new command when a buffer is full, the system deletes the oldest command entry in
the buffer.
Controlling the CLI output
This section describes the CLI output control features that help you identify the desired output.
Pausing between screens of output
The system automatically pauses after displaying a screen if the output is too long to fit on one
screen. You can use the keys described in "Output controlling keys" to display more information or
stop the display.
By default, up to 24 lines can be displayed on a screen. You can change the limit by using the
screen-length screen-length command. For more information about this command, see
Fundamentals Command Reference.
You can also disable pausing between screens of output for the current session. Then, all output is
displayed at one time and the screen is refreshed continuously until the final screen is displayed.
9
Output controlling keys
Keys Function
Space Displays the next screen.
Enter Displays the next line.
Ctrl+C Stops the display and cancels the command execution.
<PageUp> Displays the previous page.
<PageDown> Displays the next page.
Disabling pausing between screens of output
To disable pausing between screens of output, execute the following command in user view:
Task Command Remarks
Disable pausing
between screens of
output for the current
session.
screen-length
disable
The default for a session depends on the setting of the
screen-length command in user line view. The default of
the screen-length command is pausing between screens
of output and displaying up to 24 lines on a screen.
This command is a one-time command and takes effect
only for the current session.
Numbering each output line from a display command
You can use the | by-linenum option to prefix each display command output line with a number for
easy identification.
Each line number is displayed as a 5-character string and might be followed by a colon (:) or hyphen
(-). If you specify the | by-linenum option and the | begin regular-expression option for a display
command, a hyphen is displayed for all lines that do not match the regular expression.
To number each output line from a display command:
Task Command
Number each output line from a display command. display command |by-linenum
For example:
# Display information about VLAN 999, numbering each output line.
<Sysname> display vlan 999 | by-linenum
1: VLAN ID: 999
2: VLAN type: Static
3: Route interface: Configured
4: IP address: 192.168.2.1
5: Subnet mask: 255.255.255.0
6: Description: For LAN Access
7: Name: VLAN 0999
8: Tagged ports: None
9: Untagged ports:
10: FortyGigE1/0/1
10
Filtering the output from a display command
You can use the | { begin | exclude | include } regular-expression option to filter the display
command output:
•begin—Displays the first line matching the specified regular expression and all subsequent
lines.
•exclude—Displays all lines not matching the specified regular expression.
•include—Displays all lines matching the specified regular expression.
•regular-expression—A case-sensitive string of 1 to 256 characters, which can contain the
special characters described in Table 6.
The filtering operation takes time. The more complicated the regular expression is, the longer the
filtering operation takes. To stop the operation, press Ctrl+C.
Table 6 Special characters supported in a regular expression
Characters Meaning Examples
^ Matches the beginning of a line. "^u" matches all lines beginning with "u". A line
beginning with "Au" is not matched.
$ Matches the end of a line. "r$" matches all lines ending with "r". A line
ending with "rA" is not matched.
. (period) Matches any single character. ".s" matches "as" and "bs".
* Matches the preceding character or
string zero, one, or multiple times.
"zo*" matches "z" and "zoo", and "(zo)*" matches
"zo" and "zozo".
+ Matches the preceding character or
string one or multiple times. "zo+" matches "zo" and "zoo", but not "z".
| Matches the preceding or succeeding
string. "def|int" matches a line containing "def" or "int".
( )
Matches the string in the
parentheses, usually used together
with the plus sign (+) or asterisk sign
(*).
"(123A)" matches "123A".
"408(12)+" matches "40812" and "408121212",
but not "408".
\N
Matches the preceding strings in
parentheses, with the Nth string
repeated once.
"(string)\1" matches a string containing
"stringstring".
"(string1)(string2)\2" matches a string containing
"string1string2string2".
"(string1)(string2)\1\2" matches a string
containing " string1string2string1string2".
[ ] Matches a single character in the
brackets.
"[16A]" matches a string containing 1, 6, or A;
"[1-36A]" matches a string containing 1, 2, 3, 6, or
A (- is a hyphen).
To match the character "]", put it immediately
after "[", for example, []abc]. There is no such limit
on "[".
[^] Matches a single character that is not
in the brackets.
"[^16A]" matches a string that contains at least
one character other than 1, 6, or A, such as "abc".
A match can also contain 1, 6, or A (such as
"m16"), but it cannot contain these three
characters only (such as 1, 16, or 16A).
{n}
Matches the preceding character n
times. The number nmust be a
nonnegative integer.
"o{2}" matches "food", but not "Bob".
11
Characters Meaning Examples
{n,}
Matches the preceding character n
times or more. The number nmust be
a nonnegative integer.
"o{2,}" matches "foooood", but not "Bob".
{n,m}
Matches the preceding character nto
mtimes or more. The numbers nand
mmust be nonnegative integers and
ncannot be greater than m.
" o{1,3}" matches "fod", "food", and "foooood", but
not "fd".
\<
Matches a string that starts with the
pattern following \<. A string that
contains the pattern is also a match if
the characters preceding the pattern
are not digits, letters, or underscores.
"\<do" matches "domain" and "doa".
\>
Matches a string that ends with the
pattern preceding \>. A string that
contains the pattern is also a match if
the characters following the pattern
are not digits, letters, or underscores.
"do\>" matches "undo" and "cdo".
\b
Matches a word that starts with the
pattern following \b or ends with the
pattern preceding \b.
"er\b" matches "never", but not "verb" or "erase".
"\ber" matches "erase", but not "verb" or "never".
\B
Matches a word that contains the
pattern but does not start or end with
the pattern.
"er\B" matches "verb", but not "never" or "erase".
\w Same as [A-Za-z0-9_], matches a
digit, letter, or underscore. "v\w" matches "vlan" and "service".
\W
Same as [^A-Za-z0-9_], matches a
character that is not a digit, letter, or
underscore.
"\Wa" matches "-a", but not "2a" or "ba".
\
Escape character. If a special
character listed in this table follows \,
the specific meaning of the character
is removed.
"\\" matches a string containing "\", "\^" matches a
string containing "^", and "\\b" matches a string
containing "\b".
For example:
# Use |begin line in the display current-configuration command to match the first line of output
that contains line to the last line of output.
<Sysname> display current-configuration | begin line
line class aux
user-role network-admin
#
line class vty
user-role network-operator
#
line aux 1
user-role network-admin
#
line vty 0 63
authentication-mode scheme
user-role network-operator
#
ssh server enable
12
#
return
# Use | exclude Direct in the display ip routing-table command to filter out direct routes and
display only the non-direct routes.
<Sysname> display ip routing-table | exclude Direct
Destinations : 12 Routes : 12
Destination/Mask Proto Pre Cost NextHop Interface
2.2.2.0/24 OSPF 10 2 1.1.2.2 FGE1/0/2
# Use | include snmp in the display current-configuration command to filter in entries that contain
snmp.
<Sysname> display current-configuration | include snmp
snmp-agent
snmp-agent community write private
snmp-agent community read public
snmp-agent sys-info version all
snmp-agent target-host trap address udp-domain 192.168.1.26 params securityname public
Saving the output from a display command to a file
A display command shows certain configuration and operation information of the device. Its output
might vary over time or with user configuration or operation. You can save the output to a file for
future retrieval or troubleshooting.
Use one of the following methods to save the output from a display command:
•Save the output to a separate file. Use this method if you want to use one file for a single
display command.
•Append the output to the end of a file. Use this method if you want to use one file for multiple
display commands.
To save the output from a display command to a file, use one of the following commands in any view:
Task Command
Save the output from a display command to a separate file. display command > filename
Append the output from a display command to the end of a file. display command >> filename
For example:
# Save the VLAN 1 settings to a separate file named vlan.txt.
<Sysname> display vlan 1 > vlan.txt
# Verify whether the VLAN 1 settings are saved to file vlan.txt.
<Sysname> more vlan.txt
VLAN ID: 1
VLAN type: Static
Route interface: Not configured
Description: VLAN 0001
Name: VLAN 0001
Tagged ports: None
Untagged ports:
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