Dell S4048-ON User manual

A Dell Deployment and Configuration Guide
Dell Networking S4048-ON
Switch Configuration Guide for Dell PS Series SANs
Dell Storage Engineering
August 2015

2 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
Revisions
Date
Description
August 2015
Initial release
THIS WHITE PAPER IS FOR INFORMATIONAL PURPOSES ONLY, AND MAY CONTAIN TYPOGRAPHICAL ERRORS AND
TECHNICAL INACCURACIES. THE CONTENT IS PROVIDED AS IS, WITHOUT EXPRESS OR IMPLIED WARRANTIES OF
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trademarks and trade names may be used in this document to refer to either the entities claiming the marks and
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3 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
Table of contents
Revisions............................................................................................................................................................................................. 2
1Introduction................................................................................................................................................................................ 5
1.1 Document conventions ................................................................................................................................................. 5
1.2 Audience........................................................................................................................................................................... 5
1.3 Switch details ................................................................................................................................................................... 5
1.4 Cabling diagram .............................................................................................................................................................. 7
2Dell recommended switch configuration .............................................................................................................................8
2.1 Hardware configuration.................................................................................................................................................8
2.2 Delete startup configuration.........................................................................................................................................8
2.3 Configure out of band (OOB) management port .....................................................................................................8
2.4 Configure route for OOB management port (optional) ..........................................................................................9
2.5 Configure login credentials...........................................................................................................................................9
2.6 Enable switch ports ........................................................................................................................................................9
2.7 Enable Jumbo Frames....................................................................................................................................................9
2.8 Configure flow control ..................................................................................................................................................9
2.9 Configure spanning tree on edge ports....................................................................................................................10
2.10 Configure port channel for LAG................................................................................................................................. 10
2.11 Configure QSFP ports for LAG....................................................................................................................................10
2.12 Save configuration ........................................................................................................................................................10
2.13 Configure additional switch ........................................................................................................................................10
3Configure Data Center Bridging (DCB) (optional) ..............................................................................................................11
3.1 Disable 802.3x flowcontrol on SFP+ ports................................................................................................................11
3.2 Disable 802.3x flowcontrol on QSFP ports ...............................................................................................................11
3.3 Enable DCB and reload.................................................................................................................................................11
3.4Create tagged VLAN for all ports and port-channels..............................................................................................11
3.5 Configure DCB policies ............................................................................................................................................... 12
3.6 Apply policies to switch ports..................................................................................................................................... 12
3.7 Save configuration ........................................................................................................................................................ 12
3.8 Configure additional switch ........................................................................................................................................ 12
4Reverting from DCB to non-DCB configuration (optional) ............................................................................................. 13
4.1 Disable DCB ................................................................................................................................................................... 13

4 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
4.2 Remove DCB policies and apply standard flow control ........................................................................................ 13
4.3 Revert to default VLAN ID on switch and arrays ..................................................................................................... 13
4.4 Save configuration ........................................................................................................................................................ 14
4.5 Reload ............................................................................................................................................................................. 14
4.6 Verify DCB status........................................................................................................................................................... 14
4.7 Configure additional switch ........................................................................................................................................ 14
5Optional stack configuration ................................................................................................................................................. 15
5.1 Delete startup configuration on first switch ............................................................................................................ 15
5.2 Configure stack on the first switch ............................................................................................................................ 15
5.3 Delete startup configuration on the second switch............................................................................................... 15
5.4 Configure stack on the second switch ..................................................................................................................... 16
5.5 Verify stack configuration............................................................................................................................................ 16
5.6 Configure out of band (OOB) management port ................................................................................................... 16
5.7 Configure route for OOB management port (optional) ........................................................................................ 17
5.8 Configure login credentials......................................................................................................................................... 17
5.9 Configuring switch ports ............................................................................................................................................. 17
5.10 Save configuration and reload.................................................................................................................................... 18
Additional resources....................................................................................................................................................................... 19

5 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
1Introduction
This document illustrates how to configure Dell Networking S4048-ON switches for use with Dell™ PS
Series storage while using Dell best practices. The recommended configuration uses Link Aggregation
Groups (LAGs) for inter-switch connections. Optional steps are provided in section 3 to enable Data
Center Bridging (DCB) and for stack configurations.
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, or 1 and 5 in this Switch Configuration Guide.
For more information on PS Series SAN design recommendations, see the PS Series Configuration Guide
at: www.Delltechcenter.com/page/equallogic+configuration+guide.
1.1 Document conventions
Table 1 lists the formatting conventions used in this document.
Table 1 Document conventions
Format
Description
Example
Bold
User input
Dell>enable
Italic
Placeholder or variable
your password
<Italic> <brackets>
Separate variables
<ip address> <mask>
1.2 Audience
This switch configuration guide describes an optimal configuration following Dell best practices for a PS
Series iSCSI SAN and is intended for storage or network administrators and deployment personnel.
1.3 Switch details
Table 2 provides an overview of the switch configuration.
Table 2 Switch specifications
Dell Networking S4048-ON
Switch vendor
Dell
Switch model
S4048-ON
Switch firmware
9.8.0.0 or later

6 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
Note: For proper functionality, the switch must be at the switch firmware version shown in Table 2
before proceeding with this configuration. Using previous firmware versions may have unpredictable
results.
The latest firmware updates and documentation can be found at: www.force10networks.com. This site
requires a login.
Note: Firmware version 9.8.0.0 incorporates new command-line syntax for DCB configuration. To
configure a new switch for DCB operation, follow the configuration steps in this Switch Configuration
Guide as outlined below.
If you are upgrading from Dell firmware version prior to 9.8.0.0, your DCB settings in the running
configuration file will be preserved and you may continue to use the original DCB command-line syntax.
If you make changes using the previous DCB command-line syntax, you will receive a warning message
that the commands have been deprecated, however the commands will still continue to function as they
did with the previous version.

7 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
1.4 Cabling diagram
The cabling diagram shown below represents the Dell recommend method for deploying your servers and
PS Series arrays.
Figure 1 Cabling diagram

8 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
2Dell recommended switch configuration
These steps show you how to configure two S4048-ON switches with a Link Aggregation Group (LAG).
The switches are interconnected using two of the 40GbE Quad Small Form-factor Pluggable (QSFP) uplink
ports, 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 PuTTY or another 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 115200,N,8,1 and no flow control.
5. Connect the (QSFP) LAG cables between the switches by connecting port 49 on switch 1 to port 49
on switch 2 and port 50 on switch 1 to port 50 on switch 2. See this configuration in Figure 1.
2.2 Delete startup configuration
Note: The following commands will delete all configuration settings.
Dell>enable
Dell#delete startup-config
Proceed to delete startup-config [confirm yes/no]yes
Dell#reload
System configuration has been modified. Save? [yes/no]no
Proceed with reload [confirm yes/no]yes
Note: The switch will reboot.
2.3 Configure out of band (OOB) management port
Dell>enable
After the startup configuration is deleted, the factory default Enable mode password is calvin.
Dell>#configure
Dell(conf)#interface ManagementEthernet 1/1
Dell(conf-if-ma-1/1)#no shutdown
Dell(conf-if-ma-1/1)#ip address <ip address> <mask>
Dell(conf-if-ma-1/1)#exit

9 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
2.4 Configure route for OOB management port (optional)
Dell(conf)#management route X.Y.Z.0 /24 A.B.C.1
Note: X.Y.Z.0 is the network your management system is connecting from and A.B.C.1 is the gateway for
the switch. If your management system is on the same subnet as the switch, the previous step may be
omitted. The previous example assumes a class C subnet mask.
2.5 Configure login credentials
Dell(conf)#username admin privilege 15 password 0 yourpassword
Dell(conf)#enable password level 15 0 yourpassword
2.6 Enable switch ports
Option 1: Enable ports individually by entering the port number.
Dell(conf)#interface tengigabitethernet 1/1
Dell(conf-if-te-1/1)#switchport
Dell(conf-if-te-1/1)#no shutdown
Dell(conf-if-te-1/1)#exit
Dell(conf)#exit
Option 2: Enable multiple ports at once using the ‘range’ parameter.
Dell#configure
Dell(conf)#interface range tengigabitethernet 1/1–1/48
Dell(conf -if-range-te-1/1-48)#switchport
Dell(conf -if-range-te-1/1-48)#no shutdown
Dell(conf -if-range-te-1/1-48)#exit
Dell(conf)#exit
2.7 Enable Jumbo Frames
Dell#configure
Dell(conf)# interface range tengigabitethernet 1/1–48
Dell(conf -if-range-te-1/1-48)#mtu 12000
2.8 Configure flow control
Dell(conf -if-range-te-1/1-48)#flowcontrol rx on tx off

10 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
2.9 Configure spanning tree on edge ports
Dell(conf-if-range-te-1/1-48)#spanning-tree rstp edge-port
Dell(conf-if-range-te-1/1-48)#exit
Dell(conf)# protocol spanning-tree rstp
Dell(conf-rstp)#no disable
Dell(conf-rstp)#exit
2.10 Configure port channel for LAG
These commands configure the switch interconnect as a LAG.
Dell(conf)#interface Port-channel 1
Dell(conf-if-po-1)#mtu 12000
Dell(conf-if-po-1)#switchport
Dell(conf-if-po-1)#no shutdown
Dell(conf-if-po-1)#exit
2.11 Configure QSFP ports for LAG
These commands assign 40Gb QSFP ports to the Port Channel.
Dell(conf)#interface range fortyGigE 1/49 , fortyGigE 1/50
Dell(conf-if-range-fo-1/49,fo-1/50)#no ip address
Dell(conf-if-range-fo-1/49,fo-1/50)#mtu 12000
Dell(conf-if-range-te-1/49,fo-1/50)#no shutdown
Dell(conf-if-range-fo-1/49,fo-1/50)#flowcontrol rx on tx off
Dell(conf-if-range-fo-1/49,fo-1/50)#port-channel-protocol lacp
Dell(conf-if-range-fo-1/49,fo-1/50-lacp)#port-channel 1 mode active
Dell(conf-if-range-fo-1/49,fo-1/50-lacp)#exit
Dell(conf-if-range-fo-1/49,fo-1/50)#exit
Dell(conf)#exit
2.12 Save configuration
Dell#copy running-config startup-config
2.13 Configure additional switch
Repeat the commands from sections 2.2–2.13 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.

11 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
3Configure Data Center Bridging (DCB) (optional)
To enable DCB mode on the switch, use the following commands.
Note: You must complete the Dell recommended switch configuration steps in Sections 2.1 to 2.12
before configuring the switch for DCB mode.
3.1 Disable 802.3x flowcontrol on SFP+ ports
Dell#configure
Dell(conf)#interface range tengigabitethernet 1/1–1/48
Dell(conf-if-range-te-1/1-48)#no flowcontrol rx on tx off
Dell(conf-if-range-te-1/1-48)#exit
3.2 Disable 802.3x flowcontrol on QSFP ports
Dell(conf)#interface range fortyGigE 1/49 , fortyGigE 1/50
Dell(conf-if-range-fo-1/49-50)#no flowcontrol rx on tx off
Dell(conf-if-range-fo-1/49-50)#exit
3.3 Enable DCB and reload
Dell(conf)#dcb enable
Dell(conf)#exit
Dell#copy running-config startup-config
Dell#reload
Note: After confirming reload request, the switch will reboot.
3.4 Create tagged VLAN for all ports and port-channels
Dell#configure
Dell(conf)#interface vlan vlan-id
Note: You must supply a VLAN id. The valid range is 2-4093.
Dell (conf-if-vl-vlan-id*)#no shutdown
Dell (conf-if-vl-vlan-id*)#tagged tengigabitethernet 1/1–1/48
Dell (conf-if-vl-vlan-id*)#tagged port-channel 1
Dell (conf-if-vl-vlan-id*)#exit

12 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
3.5 Configure DCB policies
Dell(conf)#dcb-map profile-name
Dell(conf-dcbmap-profile-name*)#priority-group 0 bandwidth 50 pfc off
Dell(conf-dcbmap-profile-name*)#priority-group 1 bandwidth 50 pfc on
Note: The sum of the bandwidth-percentages must be equal to 100.
Dell(conf-dcbmap-profile-name*)#priority-pgid 0 0 0 0 1 0 0 0
Dell(conf-dcb-profile-name*)#exit
3.6 Apply policies to switch ports
Dell(conf)#interface range tengigabitethernet 1/1–1/48
Dell(conf-if-range-te-1/1-48)# dcb-map profile-name
Dell(conf-if-range-te-1/1-48)#exit
Dell(conf)#interface range fortyGigE 1/49 , fortyGigE 1/50
Dell(conf-if-range-fo-1/49,fo-1/50)# dcb-map profile-name
Dell(conf-if-range-fo-1/49,fo-1/50)#exit
Dell(conf)#exit
Note: The sum of the bandwidth-percentages must be equal to 100.
3.7 Save configuration
Dell#copy running-config startup-config
3.8 Configure additional switch
Repeat the commands from section 3 to configure DCB on additional switches.

13 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
4Reverting from DCB to non-DCB configuration (optional)
One method to revert from a DCB-configured switch to a non-DCB-configured switch is to delete the
current configuration (startup-config) and follow the steps in section 2. If deleting the current
configuration is not an option, use the following procedure to unconfigure DCB and enable standard flow
control.
Note: This is a disruptive operation that requires down time. The arrays will temporarily lose
communication with each other. Power off all arrays and hosts connected to the SAN before proceeding
with these steps.
4.1 Disable DCB
Dell#configure
Dell(conf)#no dcb enable
Dell(conf)#exit
4.2 Remove DCB policies and apply standard flow control
Dell#configure
Dell(conf)#interface range tengigabitethernet 1/1-48
Dell(conf-if-range-te-1/1-1/48)#no dcb-map profile-name
Dell(conf-if-range-te-1/1-48)#flowcontrol rx on tx off
Dell(conf-if-range-te-1/1-48)#exit
Dell(conf)#interface range fortyGigE 1/49 , fortyGigE 1/50
Dell(conf-if-range-fo-1/49,fo-1/50)#no dcb-map profile-name
Dell(conf-if-range-fo-1/49,fo-1/50)#flowcontrol rx on tx off
Dell(conf-if-range-fo-1/49,fo-1/50)#exit
Dell(conf)#exit
4.3 Revert to default VLAN ID on switch and arrays
Once DCB is disabled on the switch, the PS Series arrays will no longer use the VLAN ID that was
configured when DCB was enabled. The arrays will revert to the default or native VLAN. Therefore, a valid
VLAN must be configured for all host servers, switches, and PS Series array members. A valid VLAN can use
the default or native VLAN ID (typically 0 or 1), or a specific VLAN can be configured (for example, VLAN
100). If a non-default VLAN is configured, then any ports connected to the arrays must be configured as
“untagged”.
Note: Host NICS must also be updated with matching VLAN information.

14 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
Use the following steps to configure the native VLAN on the switch.
Dell#configure
Dell(conf)#no interface vlan vlan-id
4.4 Save configuration
Dell#copy running-config startup-config
4.5 Reload
Dell#reload
System configuration has been modified. Save? [yes/no]yes
Proceed with reload [confirm yes/no]yes
Note: The switch will reboot.
4.6 Verify DCB status
Dell#show dcb
The following status is displayed:
DCB Status : Disabled
4.7 Configure additional switch
Repeat the commands from section 4 to disable DCB on any additional switches.

15 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
5Optional stack configuration
Note: If you wish to use a stack configuration instead of LAG, follow the instructions in this section
instead of those in section 2.
One advantage of stacked switches is that they can be managed as a single switch. However, firmware
updates will update all members of the stack simultaneously and therefore should only be done during
planned downtime.
5.1 Delete startup configuration on first switch
Dell>enable
Dell#delete startup-config
Proceed to delete startup-config [confirm yes/no]yes
Dell#reload
System configuration has been modified. Save? [yes/no]no
Proceed with reload [confirm yes/no]yes
Note: The switch will reboot.
5.2 Configure stack on the first switch
Dell>enable
After the startup configuration is deleted, the factory default Enable mode password is calvin.
Dell#configure
Dell(conf)#stack-unit 1 priority 1
Dell(conf)#stack-unit 1 stack-group 12
Dell(conf)#stack-unit 1 stack-group 13
Dell(conf)#exit
Dell#copy running-config startup-config
Dell#reload
5.3 Delete startup configuration on the second switch
Dell>enable
Dell#delete startup-config
Proceed to delete startup-config [confirm yes/no]yes
Dell#reload

16 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
System configuration has been modified. Save? [yes/no]no
Proceed with reload [confirm yes/no]yes
Note: The switch will reboot.
5.4 Configure stack on the second switch
Dell>enable
Dell#stack-unit 1 renumber 2
Note: After confiming configuration change, the switch will need to reboot.
Dell#configure
Dell(conf)#stack-unit 2 priority 1
Dell(conf)#stack-unit 2 stack-group 12
Dell(conf)#stack-unit 2 stack-group 13
Dell(conf)#exit
Dell#copy running-config startup-config
Dell#reload
5.5 Verify stack configuration
From the first switch (Master) CLI, confirm that the stack has formed:
Dell#show redundancy
Dell#show boot system stack-unit all
Note: The MASTER LED on the switch front panel will show a steady light for the master unit and a
blinking light for the standby unit. All of the following configuration steps must be performed from the
master switch.
5.6 Configure out of band (OOB) management port
Dell#config
Dell(conf)#interface ManagementEthernet 1/1
Dell(conf-if-ma-1/1)#no shutdown
Dell(conf-if-ma-1/1)#ip address ipaddress mask
Dell(conf-if-ma-1/1)#no shutdown
Dell(conf-if-ma-1/1)#exit

17 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
5.7 Configure route for OOB management port (optional)
Dell(conf)#management route X.Y.Z.0 /24 A.B.C.1
Note: X.Y.Z.0 is the network your management system is connecting from and A.B.C.1 is the gateway for
the switch. If your management system is on the same subnet as the switch, the previous step may be
omitted. The previous example assumes a class C subnet mask.
5.8 Configure login credentials
Dell(conf)#username admin privilege 15 password 0 yourpassword
Dell(conf)#enable password level 15 0 yourpassword
5.9 Configuring switch ports
Dell(conf)#interface range tengigabitethernet 1/1–1/48
Dell(conf-if-range-te-1/1-48)#mtu 12000
Dell(conf-if-range-te-1/1-48)#switchport
Dell(conf-if-range-te-1/1-48)#spanning-tree rstp edge-port
Dell(conf-if-range-te-1/1-48)#flowcontrol rx on tx off
Dell(conf-if-range-te-1/1-48)#no shutdown
Dell(conf-if-range-te-1/1-48)#exit
Dell(conf)#interface range tengigabitethernet 2/1–2/48
Dell(conf-if-range-te-2/1-2/48)#mtu 12000
Dell(conf-if-range-te-2/1-2/48)#switchport
Dell(conf-if-range-te-2/1-2/48)#spanning-tree rstp edge-port
Dell(conf-if-range-te-2/1-2/48)#flowcontrol rx on tx off
Dell(conf-if-range-te-2/1-2/48)#no shut
Dell(conf-if-range-te-2/1-2/48)#exit
Dell(conf)# protocol spanning-tree rstp
Dell(conf-rstp)#no disable
Dell(conf-rstp)#exit
Dell(conf)#exit

18 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
5.10 Save configuration and reload
Dell#copy running-config startup-config
Reload the stack to allow settings to take effect:
Dell#reload
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.

19 SCG1026 Dell Networking S4048-ON Switch Configuration Guide for PS Series SANs
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:
PS Series Configuration Guide :
http://en.community.Dell.com/techcenter/storage/w/wiki/equallogic-configuration-guide.aspx
 Dell Storage Compatibility Matrix:
http://en.community.dell.com/dell-groups/dtcmedia/m/mediagallery/20438558/download.aspx
For PS Series best practices white papers, reference architectures, and sizing guidelines for
enterprise applications and SANs, refer to:
http://en.community.dell.com/techcenter/storage/w/wiki/2660.equallogic-technical-content