Dell N2000 Series User manual

Dell Networking N2000 Series
Switch Configuration Guide for EqualLogic SANs
Dell Storage Engineering
May 2014
[e-mail]

2 SCG1015 Dell Networking N2000 Series Configuration Guide
Revisions
Date
Description
May 2014
Initial release
© 2014 Dell Inc. All rights reserved. Reproduction of this material in any manner whatsoever without the express
written permission of Dell Inc. is strictly forbidden. For more information, contact Dell.
Dell, the Dell logo, and the Dell badge, EqualLogic, and Force10 are trademarks of Dell Inc.

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Table of contents
Revisions............................................................................................................................................................................................. 2
1Introduction................................................................................................................................................................................4
1.1 Audience...........................................................................................................................................................................4
1.2 Switch details ................................................................................................................................................................... 4
1.3 Cabling diagram .............................................................................................................................................................. 5
2Dell recommended switch configuration .............................................................................................................................6
2.1 Hardware configuration.................................................................................................................................................6
2.2 Delete startup configuration.........................................................................................................................................6
2.3 Configure out-of-band management port (Optional).............................................................................................8
2.4 HTTP and Telnet authentication .................................................................................................................................. 8
2.5 Enable iSCSI optimization feature................................................................................................................................9
2.6 Enable flow control ........................................................................................................................................................9
2.7 Configure Jumbo MTU for all ports ..........................................................................................................................10
2.8 Configure spanning tree portfast on edge ports.....................................................................................................10
2.9 Configure 10GbE ports for LAG ................................................................................................................................. 10
2.10 Save configuration ........................................................................................................................................................10
2.11 Configure additional switch .........................................................................................................................................11
3Stack configuration (optional) ............................................................................................................................................... 12
3.1 Configure out-of-band management port (Optional)........................................................................................... 14
3.2 HTTP and Telnet authentication ................................................................................................................................ 14
3.3 Enable iSCSI optimization feature.............................................................................................................................. 15
3.4 Enable flow control ...................................................................................................................................................... 15
3.5 Configure Jumbo MTU for all ports .......................................................................................................................... 16
3.6 Configure spanning tree portfast on edge ports..................................................................................................... 16
3.7 Save configuration ........................................................................................................................................................ 16
Additional resources....................................................................................................................................................................... 17

4 SCG1015 Dell Networking N2000 Series Configuration Guide
1Introduction
This document illustrates how to configure Dell™ Networking N2000 Series switches for use with
EqualLogic™PS Series storage using Dell best practices. The recommended configuration uses link
aggregation groups (LAGs) for inter-switch connections.
If you are following the Rapid EqualLogic Configuration steps at
http://en.community.dell.com/techcenter/storage/w/wiki/3615.rapid-equallogic-configuration-portal-
by-sis.aspx, use sections 1 and 2 from this guide for LAG, or sections 1 and 3 from this guide for stack
configuration.
For more information on EqualLogic SAN design recommendations, see the EqualLogic Configuration
Guide at: http://en.community.dell.com/dell-
groups/dtcmedia/m/mediagallery/19852516/download.aspx.
1.1 Audience
This switch configuration guide describes an optimal configuration following Dell best practices for an
EqualLogic iSCSI SAN and is intended for storage or network administrators and deployment personnel.
1.2 Switch details
The table below provides an overview of the switch configuration.
Table 1 Switch specifications
Dell Networking N2000 Series
Switch vendor
Dell
Switch model
Dell Networking N2000 series –N2024, N2048
Switch firmware
6.0.1.3 and later
Note: For proper functionality, the switch must be at the switch firmware version shown in the table
above before proceeding with this configuration. Using previous firmware versions may have
unpredictable results.
The latest firmware updates and documentation can be found at: support.dell.com.

5 SCG1015 Dell Networking N2000 Series Configuration Guide
1.3 Cabling diagram
The cabling diagram shown below represents the Dell recommend method for deploying your servers and
EqualLogic arrays.
Figure 1 Cabling diagram

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2Dell recommended switch configuration
These steps show you how to configure two Dell Networking N2000 switches with a Link Aggregation
Group (LAG). The switches are interconnected using the fixed 10GbE SFP+ module on the front and the
LAG is configured for Dynamic Link Aggregation Control Protocol (LACP).
2.1 Hardware configuration
1. Power on the two switches.
2. Connect a serial cable to the serial port of the first switch.
3. Using any terminal utility, open a serial connection session to the switch.
4. Open your terminal emulator and configure it to use the serial port (usually COM1, but this may
vary depending on your system). Configure serial communications for 9600,N,8,1 and no flow
control.
5. Connect the optical cables between the fixed 10GbE module on the front of the N2000 switches.
See this configuration in Figure 1.
2.2 Delete startup configuration
Note: All configuration settings will be deleted
console>enable
console#reload
Are you sure you want to reload the stack? (y/n) y
Note: The switch will reboot.
Follow the prompts shown below when the Main Menu is displayed during the bootup process.
Dell Networking Boot Options
============================
Select a menu option within 3 seconds or the Operational Code will start
automatically...
1 - Start Operational Code
2 - Display Boot Menu
Select (1, 2)# 2
Boot Main Menu
==============

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1 - Start Operational Code
2 - Select Baud Rate
3 - Retrieve Logs
4 - Load New Operational Code
5 - Display Operational Code Details
9 - Reboot
10 - Restore Configuration to Factory Defaults
11 - Activate Backup Image
12 - Start Password Recovery
Enter choice number 10.
Are sure you want to Erase Current Configuration? (Y/N): Y
Erasing Current Configuration...done.
Boot Main Menu
==============
1 - Start Operational Code
2 - Select Baud Rate
3 - Retrieve Logs
4 - Load New Operational Code
5 - Display Operational Code Details
9 - Reboot
10 - Restore Configuration to Factory Defaults
11 - Activate Backup Image
12 - Start Password Recovery
Enter choice number 9and the system will reboot. Wait for the following prompt:
Would you like to run the setup wizard (you must answer this question within 60
seconds)? [Y/N] N

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2.3 Configure out-of-band management port (Optional)
This section will configure a 1GbE port to be used as a dedicated out-of-band (OOB) management port. It
is recommended to perform this step. If you skip this step, then all configuration and monitoring must be
performed via the serial ports.
Note: In the configuration below, Vlan 50 is used for management. Use any valid non-default vlan in your
setup. The IP address provided should be accessible from your management system (and not connected
to the SAN). The switch port used in this configuration should be connected to a LAN or management
network.
console>enable
console#configure
console(config)#vlan 50
console(config-vlan50)#exit
console(config)#interface vlan 50
console(config-if-vlan50)#ip address ipaddress mask
console(config-if-vlan50)#exit
console(config)#interface gigabitethernet 1/0/port number
console(config-if-Gi1/0/port number)#switchport access vlan 50
console(config-if-Gi1/0/port number)#exit
Note: If your management system is in the same subnet as the switch, omit the step below.
console(config)#ip default-gateway gateway
Warning! Notice! The configured default gateway will not take effect until an
interface belonging to the same subnet as the configured Gateway is created and
activated.
console(config)#exit
2.4 HTTP and Telnet authentication
console#configure
console(config)#line telnet
console(config-telnet)#login authentication default

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console(config-telnet)#exit
console(config)#ip http authentication local
console(config)#username admin password yourpassword privilege 15
console(config)#enable password yourpassword
2.5 Enable iSCSI optimization feature
This feature, enabled by default, is activated only when EqualLogic arrays are detected, however, Dell
recommends manually configuring these steps too. This feature, when enabled automatically, performs
the following:
Configures jumbo frames to 9216 on all ports.
Disables unicast storm.
Enables spanning tree portfast on ports connected to EqualLogic arrays.
Configures flow control on all ports.
Note: Spanning tree portfast must be manually configured for host facing ports. Refer to Section 2.8.
console#configure
console(config)#iscsi enable
Enabling iSCSI Optimization will enable Flow Control which may cause all the
interfaces to temporarily go down.
Are you sure you want to continue? (y/n) y
console(config)#exit
2.6 Enable flow control
Note: If iSCSI optimization is enabled, flow control is automatically configured on all switch ports upon
detection of an EqualLogic Array. Dell recommends also manually configuring this step.
console#configure
console(config)#flowcontrol receive on
This operation may take a few minutes.
Management interfaces will not be available during this time.
Are you sure you want to continue? (y/n)y
console(config)#exit

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2.7 Configure Jumbo MTU for all ports
Note: If iSCSI optimization is enabled, flow control is automatically configured on all switch ports upon
detection of an EqualLogic Array. Dell recommends also manually configuring this step.
console(config)#system jumbo mtu 9216
console(config)#exit
2.8 Configure spanning tree portfast on edge ports
Note: If iSCSI optimization is enabled, spanning tree portfast is automatically configured on ports
connected to EqualLogic arrays. These manual steps must be performed on switch ports connected to
hosts servers.
console#configure
console(config)#interface range gigabitethernet all
console(config-if)#spanning-tree portfast
console(config-if)#exit
2.9 Configure 10GbE ports for LAG
These commands assign the two fixed 10GbE SFP+ ports on the front of the switch to the Port Channel.
console(config)#interface range tengigabitethernet 1/0/1-2
console(config-if)#no spanning-tree portfast
console(config-if)#channel-group 1 mode active
console(config-if)#exit
console(config)#exit
2.10 Save configuration
console#copy running-config startup-config
This operation may take a few minutes.
Management interfaces will not be available during this time.
Are you sure you want to save? (y/n)y

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2.11 Configure additional switch
Repeat the commands from Section 2 to configure the second switch.
Note: The preceding procedure places all switch ports in the default VLAN. If you prefer to place ports in
a non-default VLAN, refer to the documentation for your switch.

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3Stack configuration (optional)
Note: If you already completed Section 2 you are finished. If you wish to use a stack configuration
instead of LAG, follow the instructions below instead of Section 2.
Note: One advantage of stacked switches is that they can be managed as a single switch; however
firmware updates will update and reboot all members of the stack simultaneously and therefore should
only be done during planned downtime.
1. Connect the cables between the stacked switches. (Stacking ports are on the rear side of the
switch).
2. On both switches, type the following commands to clear the current configuration:
console>enable
console#reload
Are you sure you want to reload the stack? (y/n) y
Note: The switch will reboot.
Follow the prompts shown below when the Main Menu is displayed during the bootup process.
Dell Networking Boot Options
============================
Select a menu option within 3 seconds or the Operational Code will start
automatically...
1 - Start Operational Code
2 - Display Boot Menu
Select (1, 2)# 2
Boot Main Menu
==============
1 - Start Operational Code
2 - Select Baud Rate
3 - Retrieve Logs
4 - Load New Operational Code

13 SCG1015 Dell Networking N2000 Series Configuration Guide
5 - Display Operational Code Details
9 - Reboot
10 - Restore Configuration to Factory Defaults
11 - Activate Backup Image
12 - Start Password Recovery
Enter choice number 10.
Are sure you want to Erase Current Configuration? (Y/N): Y
Erasing Current Configuration...done.
Boot Main Menu
==============
1 - Start Operational Code
2 - Select Baud Rate
3 - Retrieve Logs
4 - Load New Operational Code
5 - Display Operational Code Details
9 - Reboot
10 - Restore Configuration to Factory Defaults
11 - Activate Backup Image
12 - Start Password Recovery
Enter choice number 9and the system will reboot. Wait for the following prompt:
Would you like to run the setup wizard (you must answer this question within 60
seconds)? [Y/N] N
Note: All remaining configuration must be done from the switch designated as master. To determine
which switch is the master unit, check the Master LED located on the front of each switch.

14 SCG1015 Dell Networking N2000 Series Configuration Guide
3.1 Configure out-of-band management port (Optional)
This section configures a 1GbE port to be used as a dedicated out-of-band management port. It is
recommended to perform this step. If you skip this step, then all configuration and monitoring must be
performed through the serial ports.
Note: In the configuration below, Vlan 50 is used for management. Use any valid non-default vlan in your
setup. The IP address provided should be accessible from your management system (and not connected
to the SAN). The switch port used in this configuration should be connected to a LAN or management
network.
console>enable
console#configure
console(config)#vlan 50
console(config-vlan50)#exit
console(config)#interface vlan 50
console(config-if-vlan50)#ip address ipaddress mask
console(config-if-vlan50)#exit
console(config)#interface gigabitethernet 1/0/port number
console(config-if-Gi1/0/port number)#switchport access vlan 50
console(config-if-Gi1/0/port number)#exit
Note: If your management system is in the same subnet as the switch then omit the step below.
console(config)#ip default-gateway gateway
Warning! Notice! The configured default gateway will not take effect until an
interface belonging to the same subnet as the configured Gateway is created and
activated.
console(config)#exit
3.2 HTTP and Telnet authentication
console>enable
console#config
console(config)#line telnet

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console(config-telnet)#login authentication default
console(config-telnet)#exit
console(config)#ip http authentication local
console(config)#username admin password yourpassword privilege 15
console(config)#enable password yourpassword
3.3 Enable iSCSI optimization feature
This feature, enabled by default, is activated when EqualLogic arrays are detected, however, Dell
recommends manually configuring these steps too. It automatically performs the following:
Configures jumbo frames to 9216 on all ports.
Disables unicast storm.
Enables spanning tree portfast on ports connected to EqualLogic arrays.
Configures flow control on all ports.
Note: Spanning tree portfast must be manually configured for host facing ports. Refer to Section 3.6.
console#configure
console(config)#iscsi enable
Enabling iSCSI Optimization will enable Flow Control which may cause all the
interfaces to temporarily go down.
Are you sure you want to continue? (y/n) y
console(config)#exit
3.4 Enable flow control
Note: If iSCSI optimization is enabled, flow control is automatically configured on all switch ports upon
detection of an EqualLogic Array. Dell recommends also manually configuring this step.
console#configure
console(config)#flowcontrol receive on
This operation may take a few minutes.
Management interfaces will not be available during this time.
Are you sure you want to continue? (y/n)y
console(config)#exit

16 SCG1015 Dell Networking N2000 Series Configuration Guide
3.5 Configure Jumbo MTU for all ports
Note: If iSCSI optimization is enabled, flow control is automatically configured on all switch ports upon
detection of an EqualLogic Array. Dell recommends also manually configuring this step.
console(config)#system jumbo mtu 9216
console(config)# exit
3.6 Configure spanning tree portfast on edge ports
Note: If iSCSI optimization is enabled, spanning tree portfast is automatically configured on ports
connected to EqualLogic arrays. These manual steps must be performed on switch ports connected to
hosts servers.
console#configure
console(config)#interface range gigabitethernet all
console(config-if)#spanning-tree portfast
console(config-if)#exit
3.7 Save configuration
console#copy running-config startup-config
This operation may take a few minutes.
Management interfaces will not be available during this time.
Are you sure you want to save? (y/n)y
Note: The preceding procedure places all switch ports in the default VLAN. If you prefer to place ports in
a non-default VLAN, refer to the documentation for your switch.

17 SCG1015 Dell Networking N2000 Series Configuration Guide
Additional resources
Support.dell.com is focused on meeting your needs with proven services and support.
DellTechCenter.com is an IT Community where you can connect with Dell Customers and Dell employees
for the purpose of sharing knowledge, best practices, and information about Dell products and your
installations.
Referenced or recommended Dell publications:
Dell EqualLogic Configuration Guide:
http://en.community.dell.com/dell-groups/dtcmedia/m/mediagallery/19852516/download.aspx
Dell EqualLogic Compatibility Matrix:
http://en.community.dell.com/dell-groups/dtcmedia/m/mediagallery/19856862/download.aspx
For EqualLogic best practices white papers, reference architectures, and sizing guidelines for enterprise
applications and SANs, refer to Storage Infrastructure and Solutions Team Publications at:
http://dell.to/sM4hJT