Dell PowerConnect M6220 User manual

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Dell™ PowerConnect™ M6220
Configuration Guide
Model M6220

Notes, Notices, and Cautions
NOTE: A NOTE indicates important information that helps you make better use of your computer.
NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the
problem.
CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.
____________________
Information in this document is subject to change without notice.
© 2008 Dell Inc. All rights reserved.
Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.
Trademarks used in this text: Dell, Dell OpenManage, the DELL logo, Inspiron, Dell Precision, Dimension, OptiPlex, PowerConnect,
PowerApp, PowerVault, Axim, DellNet, and Latitude are trademarks of Dell Inc.; Microsoft, Windows, and Windows Vista are either trademarks
or registered trademarks of Microsoft Corporation in the United States and/or other countries. Procomm Plus is a registered trademark of
Symantec Corporation or its affiliates in the U.S. and other countries.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products.
Dell Inc. disclaims any proprietary interest in trademarks and trade names other than its own.
Model M6220
September 2008 Rev. A02

3
Contents
1 About this Document . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Additional Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Traceroute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CLI Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Configuration Scripting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Outbound Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Simple Network Time Protocol (SNTP) . . . . . . . . . . . . . . . . . . . . . 17
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Syslog. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Port Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
CLI Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Storm Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
CLI Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Cable Test for Copper Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
CLI Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4
3 Switching Configuration. . . . . . . . . . . . . . . . . . . . . . . . . 25
Virtual LANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
VLAN Configuration Example . . . . . . . . . . . . . . . . . . . . . . . . 26
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Web Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
IP Subnet and MAC-Based VLANs . . . . . . . . . . . . . . . . . . . . . 28
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Private Edge VLANs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
CLI Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
IGMP Snooping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
IGMP Snooping Querier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Link Aggregation/Port Channels. . . . . . . . . . . . . . . . . . . . . . . . . 33
CLI Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Web Interface Configuration: LAGs/Port-channels . . . . . . . . . . . . 36
Port Mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Port Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Link Layer Discovery Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . 39
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Denial of Service Attack Protection . . . . . . . . . . . . . . . . . . . . . . . 41
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
DHCP Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Port Aggregator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

5
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Simple Switch Mode Supported CLI Commands . . . . . . . . . . . . . . 54
4 Routing Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 61
VLAN Routing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Using the Web Interface to Configure VLAN Routing . . . . . . . . . . . 63
Virtual Router Redundancy Protocol . . . . . . . . . . . . . . . . . . . . . . 64
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Using the Web Interface to Configure VRRP . . . . . . . . . . . . . . . . 66
Proxy Address Resolution Protocol (ARP). . . . . . . . . . . . . . . . . . . . 66
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
OSPF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
OSPF Concepts and Terms . . . . . . . . . . . . . . . . . . . . . . . . . 67
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Routing Information Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . 77
RIP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Using the Web Interface to Configure RIP . . . . . . . . . . . . . . . . . 79
Route Preferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Assigning Administrative Preferences to Routing Protocols. . . . . . . . 80
Using Equal Cost Multipath . . . . . . . . . . . . . . . . . . . . . . . . . 81
Loopback Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
5 Device Security. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
802.1x Network Access Control . . . . . . . . . . . . . . . . . . . . . . . . . 85
802.1x Network Access Control Examples . . . . . . . . . . . . . . . . . 86
802.1X Authentication and VLANs . . . . . . . . . . . . . . . . . . . . . . . . 88
Authenticated and Unauthenticated VLANs . . . . . . . . . . . . . . . . 88
Guest VLAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

6
Authentication Server Filter Assignment . . . . . . . . . . . . . . . . . . . . 90
Access Control Lists (ACLs) . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
MAC ACLs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
IP ACLs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
ACL Configuration Process . . . . . . . . . . . . . . . . . . . . . . . . . 93
IP ACL CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
MAC ACL CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
RADIUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
RADIUS Configuration Examples . . . . . . . . . . . . . . . . . . . . . . 98
TACACS+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
TACACS+ Configuration Example . . . . . . . . . . . . . . . . . . . . . 100
6IPv6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Interface Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
CLI Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
DHCPv6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
7 Quality of Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Class of Service Queuing . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Ingress Port Configuration . . . . . . . . . . . . . . . . . . . . . . . . 109
Egress Port Configuration—Traffic Shaping . . . . . . . . . . . . . . . 110
Queue configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Queue Management Type . . . . . . . . . . . . . . . . . . . . . . . . 110
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Differentiated Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
CLI Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
DiffServ for VoIP Configuration Example . . . . . . . . . . . . . . . . . 116

7
8 Multicast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
IGMP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
CLI Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
IGMP Proxy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
CLI Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
DVMRP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
CLI Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
PIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
PIM-SM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
PIM-DM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

8

About this Document 9
1
About this Document
This configuration guide provides examples of how to use the Dell™PowerConnect™ 6200 Series
switch in a typical network. It describes the advantages of specific functions the PowerConnect 6200
Series switch provides and includes information about configuring those functions using the
command line interface (CLI).
Organization
This document is organized as follows:
• "System Configuration" on page 11 describes how to configure basic system and port settings, use
system interfaces and utilities, and create and use CLI scripts.
• "Switching Configuration" on page 25 provides configuration scenarios for layer 2 switching,
including creating virtual local area networks (VLANs) and Internet Group Management Protocol
(IGMP) snooping interfaces, and enabling port security.
• "Routing Configuration" on page 61 provides configuration scenarios for layer 3 features such as
VLAN routing, Open Shortest Path First (OSPF), and Routing Information Protocol (RIP).
• "Device Security" on page 85 provides information on creating access control lists and configuring
RADIUS and TACACS+ servers.
• "IPv6" on page 103 describes configuring and using IPv6-enabled interfaces in a mixed IPv6/IPv4
network.
• "Quality of Service" on page 109 provides configuration scenarios for class-of-service (CoS)
queueing and differentiated services (DiffServ).
• "Multicast" on page 119 describes how to configure IGMP, IGMP proxy, Distance Vector Multicast
Routing Protocol (DVMRP), and Protocol Independent Multicast (PIM) on the switch.
Additional Documentation
The following documentation provides additional information about PowerConnect 6200 Series
software:

10 About this Document
•The CLI Command Reference for your Dell PowerConnect switch describes the commands available
from the command-line interface (CLI) for managing, monitoring, and configuring the switch.
•The
User’s Guide for your Dell PowerConnect switch describes the Web GUI. Many of the scenarios
described in this document can be fully configured using the Web interface. This guide also provides
initial system setup and configuration instructions.
•The
Getting Started Guide for your Dell PowerConnect switch provides basic information to install,
configure, and operate the system.
• Release notes for your Dell PowerConnect product detail the platform-specific functionality of the
software packages, including issues and workarounds.

System Configuration 11
2
System Configuration
This section provides configuration scenarios for the following features:
•"Traceroute"onpage11
• "Configuration Scripting" on page 13
• "Outbound Telnet" on page 16
• "Simple Network Time Protocol (SNTP)" on page 17
• "Syslog" on page 19
• "Port Description" on page 21
• "Storm Control" on page 22
• "Cable Test for Copper Ports" on page 23
NOTE: For information on setting up the hardware and serial or TFTP connection, refer to the Getting Started
Guide
for your system.
Traceroute
Use Traceroute to discover the routes that packets take when traveling on a hop-by-hop basis to their
destination through the network.
• Maps network routes by sending packets with small Time-to-Live (TTL) values and watches the
ICMP time-out announcements
• Command displays all L3 devices
• Can be used to detect issues on the network
•Tracksupto20hops
• Default UDP port uses 33434 unless modified in the traceroute command

12 System Configuration
CLI Example
The following shows an example of using the traceroute command to determine how many hops there
are to the destination. The command output shows each IP address the packet passes through and how
long it takes to get there. In this example, the packet takes 16 hops to reach its destination.
console#traceroute ?
ipv6 Use keyword 'ipv6' if entering IPv6 Address.
<cr> Press enter to execute the command.
<ip-address|hostname> Enter IP Address or Host Name.console#traceroute
console#traceroute 72.14.253.99
Tracing route over a maximum of 20 hops
1 10.131.10.1 <10 ms <10 ms <10 ms
2 210.210.108.193 <10 ms 10 ms <10 ms
3 192.168.81.1 <10 ms 10 ms <10 ms
4 210.214.5.161 <10 ms 10 ms 10 ms
5 210.214.5.169 <10 ms <10 ms 10 ms
6 124.7.202.2 10 ms <10 ms <10 ms
7 210.18.7.166 40 ms 30 ms 30 ms
8 202.144.2.193 30 ms 30 ms 30 ms
9 202.144.113.151 30 ms 40 ms 30 ms
10 72.14.196.97 40 ms 30 ms 100 ms
11 216.239.43.216 40 ms 40 ms 30 ms
12 216.239.43.209 60 ms 40 ms 40 ms
13 216.239.43.222 40 ms 50 ms 50 ms
14 216.239.43.221 100 ms 110 ms 100 ms
15 209.85.250.88 130 ms 130 ms 120 ms
16 209.85.250.105 130 ms 120 ms 130 ms
17 209.85.250.91 160 ms 160 ms 160 ms
18 216.239.47.237 290 ms 240 ms 250 ms
19 216.239.46.211 240 ms 270 ms 250 ms
--More-- or (q)uit
20 64.233.174.99 250 ms 240 ms 250 ms
console#traceroute
Switch-traceroute> Enter the ip-address|hostname : 10.27.64.141
Switch-traceroute> Packet size (default: 40 bytes): 60
Switch-traceroute> Max ttl value (default: 20): 30
Switch-traceroute> Number of probes to send at each level (default 3): 4

System Configuration 13
Switch-traceroute> Timeout (default: 3 seconds): 5
Switch-traceroute> Source ip-address (default to select best interface address):
Switch-traceroute> Type of service byte (default) :
Tracing route over a maximum of 20 hops
1 10.27.64.141 0 ms 0 ms 0 ms
Configuration Scripting
Configuration scripting allows you to generate a text-formatted script file that shows the current system
configuration. You can generate multiple scripts and upload and apply them to more than one switch.
Overview
Configuration scripting:
• Provides scripts that can be uploaded and downloaded to the system.
• Provides flexibility to create command configuration scripts.
• Can be applied to several switches.
• Can save up to ten scripts up to a maximum size of 2 MB of memory.
• Provides List, Delete, Apply, Upload, Download.
• Provides script format of one CLI command per line.
NOTE: The startup-config and backup-config scripts are not bound by the 2 MB memory limit.
Considerations
When you use configuration scripting, keep the following considerations in mind:
• The total number of scripts stored on the system is limited by NVRAM/FLASH size.
• The application of scripts is partial if the script fails. For example, if the script executes five of ten
commands and the script fails, the script stops at five.
• Scripts cannot be modified or deleted while being applied.
• Validation of scripts checks for syntax errors only. It does not validate that the script will run.
CLI Examples
The following are examples of the commands used for configurations scripting.
Example #1: Viewing the Script Options
console#script ?

14 System Configuration
apply Applies configuration script to the switch.
delete Deletes a configuration script file from the switch.
list Lists all configuration script files present on the switch.
show Displays the contents of configuration script.
validate Validate the commands of configuration script.
Example #2: Viewing and Deleting Existing Scripts
console#script list
Configuration Script Name Size(Bytes)
-------------------------------- -----------
abc.scr 360
running-config.scr 360
startup-config 796
test.scr 360
4 configuration script(s) found.
2046 Kbytes free.
console#script delete test.scr
Are you sure you want to delete the configuration script(s)? (y/n)y
1 configuration script(s) deleted.
Example #3: Applying a Script to the Active Configuration
console#script apply abc.scr
Are you sure you want to apply the configuration script? (y/n)y
.....
....
Configuration script 'abc.scr' applied.
Example #4: Copying the Active Configuration into a Script
Use this command to capture the running configuration into a script.
console#show running-config running-config.scr
Config script created successfully.
Example #5: Uploading a Configuration Script to the TFTP Server
Use this command to upload a configuration script to the TFTP server.

System Configuration 15
console#copy script abc.scr tftp://10.27.64.141/abc.scr
Mode........................................... TFTP
Set TFTP Server IP............................. 10.27.64.141
TFTP Path...................................... ./
TFTP Filename.................................. abc.scr
Data Type...................................... Config Script
Source Filename................................ abc.scr
Management access will be blocked for the duration of the transfer
Are you sure you want to start? (y/n) y
267 bytes transferred
File transfer operation completed successfully.
Example #6: Downloading a Configuration Script to the TFTP Server
Use this command to download a configuration script from the TFTP server to the switch.
console#copy tftp://10.27.64.141/abc.scr script abc.scr
Mode........................................... TFTP
Set TFTP Server IP............................. 10.27.64.141
TFTP Path...................................... ./
TFTP Filename.................................. abc.scr
Data Type...................................... Config Script
Destination Filename........................... abc.scr
Management access will be blocked for the duration of the transfer
Are you sure you want to start? (y/n) y
193 bytes transferred
Validating configuration script...
configure
exit
configure
logging web-session
bridge aging-time 100
exit
Configuration script validated.
File transfer operation completed successfully.
Example #7: Validating a Script
console#script validate abc.scr

16 System Configuration
configure
stack
member 1 2
exit
exit
configure
stack
exit
ip address dhcp
username "admin" password 16d7a4fca7442dda3ad93c9a726597e4 level 15 encrypted
exit
Configuration script 'abc' validated.
console#script apply abc.scr
Are you sure you want to apply the configuration script? (y/n)y
configure
stack
member 1 2
Switch 1 already exists!
exit
exit
configure
stack
exit
ip address dhcp
username "admin" password 16d7a4fca7442dda3ad93c9a726597e4 level 15 encrypted
exit
Configuration script 'abc.scr' applied.
Outbound Telnet
Overview
Outbound telnet:
• Establishes an outbound telnet connection between a device and a remote host.
• When a telnet connection is initiated, each side of the connection is assumed to originate and
terminate at a “Network Virtual Terminal” (NVT).
• Server and user hosts do not maintain information about the characteristics of each other’s terminals
and terminal handling conventions.
• Must use a valid IP address.

System Configuration 17
CLI Examples
The following are examples of the commands used in the outbound telnet feature.
Example #1: Connecting to Another System by Using Telnet
console#telnet 192.168.77.151
Trying 192.168.77.151...
console#
User:admin
Password:
(Dell PC62XX Routing) >enable
Password:
console#show ip interface
Management Interface:
IP Address..................................... 10.27.65.89
Subnet Mask.................................... 255.255.254.0
Default Gateway................................ 10.27.64.1
Burned In MAC Address.......................... 00FF.F2A3.6688
Network Configuration Protocol Current......... DHCP
Management VLAN ID............................. 4022
Routing Interfaces:
Netdir Multi
Interface IP Address IP Mask Bcast CastFwd
---------- --------------- --------------- -------- --------
Simple Network Time Protocol (SNTP)
Overview
The SNTP implementation has the following features:
• Used for synchronizing network resources
•AdaptationofNTP
• Provides synchronized network timestamp
• Can be used in broadcast or unicast mode
• SNTP client implemented over UDP that listens on port 123
CLI Examples
The following are examples of the commands used in the SNTP feature.

18 System Configuration
Example #1: Viewing SNTP Options
(Dell PC62XX Routing)(Config) #sntp ?
console(config)#sntp ?
authenticate Require authentication for received Network Time
Protocol (NTP) traffic from servers.
authentication-key
Define an authentication key for Simple Network Time
Protocol (SNTP).
broadcast Configure SNTP client broadcast parameters.
client Configure the SNTP client parameters.
server Configure SNTP server parameters.
trusted-key Authenticate the identity of a system to which
SNTP will synchronize.
unicast Configure SNTP client unicast parameters.
Example #2: Configuring the SNTP Server
console(config)#sntp server ?
<ipaddress/domain-name> Enter SNTP server address or the domain name.
console(config)#sntp server 192.168.10.25 ?
key Authentication key to use when sending packets to
this peer.
poll Enable/Disable SNTP server polling.
priority Configure SNTP server priority.
<cr> Press enter to execute the command.
console(config)#sntp server 192.168.10.25
Example #3: Viewing SNTP Information
console#show sntp ?
configuration Show the configuration of the Simple Network Time
Protocol (SNTP).
status To show the status of the Simple Network Time
Protocol (SNTP).
console#show sntp configuration
Polling interval: 512 seconds
MD5 Authentication keys:
Authentication is not required for synchronization.
Trusted keys:
No trusted keys.
Unicast clients: Disable

System Configuration 19
Unicast servers:
Server Key Polling
--------- ----------- -----------
192.168.10.25 Disabled Enabled
console#show sntp status
Unicast servers:
Server Status Last response
--------- ----------- --------------------------
192.168.10.25 Unknown 00:00:00 Jan 1 1970
Syslog
Overview
Syslog:
• Allows you to store system messages and/or errors.
• Can store to local files on the switch or a remote server running a syslog daemon.
• Provides a method of collecting message logs from many systems.
Interpreting Log Files
Figure 2-1 describes the information that displays in log messages.
<130> JAN 01 00:00:06 0.0.0.0-1 UNKN [0x800023]: bootos.c(386) 4 %% Event (0xaaaaaa aa)
A. Priority
B. Timestamp
C. Stack ID
D. Component Name
E. Thread ID
F. File Name
G. Line Number
H Sequence Number
I. Message
AB
C DEF GH I

20 System Configuration
Figure 2-1. Log Files Key
CLI Examples
The following are examples of the commands used in the Syslog feature.
Example #1: Viewing Logging Information
console#show logging
Logging is enabled
Console Logging: level warning. Console Messages: 230 Dropped.
Buffer Logging: level info. Buffer Messages: 230 Logged, 200 Max
File Logging: level notActive. File Messages: 0 Dropped.
CLI Command Logging : disabled
Web Session Logging : disabled
SNMP Set Command Logging : disabled
0 Messages were not logged.
Buffer Log:
<189> JAN 01 03:57:58 10.27.65.86-1 TRAPMGR[216282304]: traputil.c(908) 31 %%
Instance 0 has elected a new STP root: 8000:00ff:f2a3:8888
<189> JAN 01 03:57:58 10.27.65.86-1 TRAPMGR[216282304]: traputil.c(908) 32 %%
Instance 0 has elected a new STP root: 8000:0002:bc00:7e2c
<189> JAN 01 04:04:18 10.27.65.86-1 TRAPMGR[231781808]: traputil.c(908) 33 %% New
Spanning Tree Root: 0, Unit: 1
<189> JAN 01 04:04:18 10.27.65.86-1 TRAPMGR[216282304]: traputil.c(908) 34 %% The
unit 1 elected as the new STP root
Example #2: Viewing the Logging File
console#show logging file
Persistent Logging : disabled
Persistent Log Count : 0
Example #5: Configuring Syslog Server
console(config)#logging ?
buffered Buffered (In-Memory) Logging Configuration.
cli-command CLI Command Logging Configuration.
console Console Logging Configuration.
facility Syslog Facility Configuration.
file Configure logging file parameters.
on Enable logging to all supporting destinations.
snmp SNMP Set Command Logging Configuration.
web-session Web Session Logging Configuration.
<ip-address|hostname> Configure syslog server IP address.