Dell S4048-ON User manual

Dell EMC Configuration and Deployment Guide
Dell EMC Networking S4048-ON
Switch Configuration Guide for Dell PS Series SANs
Abstract
This document illustrates how to configure Dell EMC™ Networking
S4048-ON switches for use with Dell™ PS Series storage while using
Dell EMC best practices.
February 2018

Revisions
2 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
Revisions
Date
Description
August 2015
Initial release
February 2018
Update to include configuration steps for both OS 9.x and 10.x
The information in this publication is provided “as is.” Dell Inc. makes no representations or warranties of any kind with respect to the information in this
publication, and specifically disclaims implied warranties of merchantability or fitness for a particular purpose.
Use, copying, and distribution of any software described in this publication requires an applicable software license.
2015–2018 Dell Inc. or its subsidiaries. All Rights Reserved. Dell, EMC, Dell EMC and other trademarks are trademarks of Dell Inc. or its subsidiaries.
Other trademarks may be trademarks of their respective owners.
Dell believes the information in this document is accurate as of its publication date. The information is subject to change without notice.

Table of contents
3 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
Table of contents
Revisions.............................................................................................................................................................................2
1Introduction...................................................................................................................................................................6
1.1 Firmware support................................................................................................................................................6
1.2 Document conventions.......................................................................................................................................6
1.3 Audience.............................................................................................................................................................6
1.4 Cabling diagram..................................................................................................................................................7
2Switch configuration (OS 9.x).......................................................................................................................................8
2.1 Dell EMC recommended switch configuration....................................................................................................8
2.1.1 Hardware configuration ......................................................................................................................................8
2.1.2 Delete startup configuration................................................................................................................................9
2.1.3 Configure out of band (OOB) management port................................................................................................9
2.1.4 Configure route for OOB management port (optional).......................................................................................9
2.1.5 Configure login credentials.................................................................................................................................9
2.1.6 Enable switch ports ..........................................................................................................................................10
2.1.7 Enable Jumbo frames.......................................................................................................................................10
2.1.8 Configure flow control.......................................................................................................................................10
2.1.9 Configure spanning tree on edge ports............................................................................................................10
2.1.10 Configure port channel for LAG ...................................................................................................................10
2.1.11 Configure QSFP ports for LAG ....................................................................................................................11
2.1.12 Save configuration........................................................................................................................................11
2.1.13 Configure additional switch..........................................................................................................................11
2.2 Configure Data Center Bridging (DCB) (optional)............................................................................................12
2.2.1 Disable 802.3x flowcontrol on SFP+ ports .......................................................................................................12
2.2.2 Disable 802.3x flowcontrol on QSFP ports.......................................................................................................12
2.2.3 Enable DCB and reload....................................................................................................................................12
2.2.4 Create tagged VLAN for all ports and port-channels........................................................................................12
2.2.5 Configure DCB policies ....................................................................................................................................13
2.2.6 Apply policies to switch ports............................................................................................................................13
2.2.7 Save configuration............................................................................................................................................13
2.2.8 Configure additional switch...............................................................................................................................13
2.3 Revert from DCB to non-DCB configuration (optional).....................................................................................13
2.3.1 Disable DCB.....................................................................................................................................................13
2.3.2 Remove DCB policies and apply standard flow control ...................................................................................14
2.3.3 Revert to default VLAN ID on switch and arrays..............................................................................................14

Table of contents
4 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
2.3.4 Save configuration............................................................................................................................................14
2.3.5 Reload ..............................................................................................................................................................14
2.3.6 Verify DCB status .............................................................................................................................................14
2.3.7 Configure additional switch...............................................................................................................................14
2.4 Optional stack configuration.............................................................................................................................15
2.4.1 Delete startup configuration on first switch.......................................................................................................15
2.4.2 Configure stack on the first switch....................................................................................................................15
2.4.3 Delete startup configuration on the second switch...........................................................................................15
2.4.4 Configure stack on the second switch..............................................................................................................16
2.4.5 Verify stack configuration .................................................................................................................................16
2.4.6 Configure out of band (OOB) management port..............................................................................................16
2.4.7 Configure route for OOB management port (optional).....................................................................................16
2.4.8 Configure login credentials...............................................................................................................................17
2.4.9 Configure switch ports......................................................................................................................................17
2.4.10 Save configuration and reload .....................................................................................................................17
3Switch configuration (OS 10.x)...................................................................................................................................18
3.1 Dell recommended switch configuration...........................................................................................................18
3.1.1 Hardware configuration ....................................................................................................................................18
3.1.2 Check firmware version....................................................................................................................................18
3.1.3 Delete startup configuration..............................................................................................................................19
3.1.4 Configure out of band (OOB) management port..............................................................................................19
3.1.5 Configure login credentials...............................................................................................................................19
3.1.6 Configure QSPF ports to 4 x 10GbE breakout ports........................................................................................19
3.1.7 Enable switch ports ..........................................................................................................................................20
3.1.8 iSCSI enable.....................................................................................................................................................20
3.1.9 Enable Jumbo frames and flow control (optional)............................................................................................21
3.1.10 Configure spanning tree on edge ports........................................................................................................21
3.1.11 Configure port channel for link aggregation.................................................................................................21
3.1.12 Configure port channel member ports..........................................................................................................21
3.1.13 Save configuration........................................................................................................................................22
3.1.14 Configure additional switch..........................................................................................................................22
3.2 Configure Data Center Bridging (DCB) (optional)............................................................................................22
3.2.1 Disable iSCSI....................................................................................................................................................22
3.2.2 Disable 802.3x flowcontrol on all ports.............................................................................................................22
3.2.3 Enable DCB......................................................................................................................................................22
3.2.4 Create tagged VLAN for all ports and port-channels........................................................................................23

Table of contents
5 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
3.2.5 Create QoS policy-map with dot1p values as trusted......................................................................................23
3.2.6 Create PFC dot1p traffic class..........................................................................................................................23
3.2.7 Configure network QoS policy map..................................................................................................................23
3.2.8 Configure ETS policies.....................................................................................................................................24
3.2.9 Create ETS policy-map for bandwidth allocations............................................................................................24
3.2.10 QoS policy....................................................................................................................................................24
3.2.11 Apply policies and VLAN ID to all switch edge ports (except port-channel member ports).........................25
3.2.12 Apply policies and vlan id on port-channel and its member ports................................................................25
3.2.13 iSCSI enable ................................................................................................................................................25
3.2.14 Save configuration........................................................................................................................................25
3.2.15 Show commands to verify DCBx, ETS, and PFC status on individual ports ...............................................26
3.2.16 Configure additional switches ......................................................................................................................26
3.3 Revert from DCB to non-DCB configuration (optional).....................................................................................27
3.3.1 Disable DCB.....................................................................................................................................................27
3.3.2 Disable iSCSI....................................................................................................................................................27
3.3.3 Remove DCB policies and apply standard flow control on edge ports ............................................................27
3.3.4 Remove DCB policies and apply standard flow control on port-channel member ports..................................28
3.3.5 Revert to default VLAN ID on switch and arrays..............................................................................................28
3.3.6 Remove ETS, PFC, and other policies from switch configuration....................................................................29
3.3.7 iSCSI enable.....................................................................................................................................................29
3.3.8 Save configuration............................................................................................................................................29
3.3.9 Reload ..............................................................................................................................................................29
3.3.10 Verify DCB status.........................................................................................................................................29
3.3.11 Configure additional switch..........................................................................................................................29
ATechnical support and resources...............................................................................................................................30
A.1 Related resources ............................................................................................................................................30

Introduction
6 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
1 Introduction
This document illustrates how to configure Dell EMC™ Networking S4048-ON switches for use with Dell™ PS
Series storage while using Dell EMC best practices. The recommended configuration uses Link Aggregation
Groups (LAGs) for inter-switch connections.
The host servers and storage controllers can be connected to the switches using the 40GbE Quad Small
Form-factor Pluggable (QSFP) ports with appropriate breakout cables. The switches are interconnected to
each other using 40GbE cables.
To enable Data Center Bridging (optional), see section 2.2 (OS 9.x) or 3.2 (OS 10.x).
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 3 in this Switch Configuration Guide.
Note: For more information on PS Series SAN design recommendations, see the Dell PS Series
Configuration Guide.
1.1 Firmware support
The Dell EMC Networking S4048-ON Open Networking switch has the ability to run different switch operating
systems software/firmware. This document provides configuration steps specific to Dell Networking OS 9.x
(firmware 9.x) and Dell Networking OS 10.x (firmware 10.x). Refer the section of this document that is
applicable to your firmware version:
•Dell Networking OS 9.x (firmware 9.x): section 2
•Dell Networking OS 10.x (firmware 10.x): section 3
1.2 Document conventions
Table 1 lists the formatting conventions used in this document.
Document conventions
Item
Convention
Example
Code samples
Monospace
System configuration has been modified.
Parameters
Italic
Dell(profile-name)#
Command-line commands
Bold
OS#show version
Command-line user-supplied
variables
Bold, italic, brackets
<vlan-id>
1.3 Audience
This switch configuration guide describes an optimal configuration following Dell EMC best practices for a PS
Series iSCSI SAN and is intended for storage or network administrators and deployment personnel.

Introduction
7 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
1.4 Cabling diagram
The cabling diagram in Figure 1 represents the Dell EMC recommended method for deploying servers and
PS Series arrays.
Cabling diagram

Switch configuration (OS 9.x)
8 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
2 Switch configuration (OS 9.x)
This section provides steps to configure Dell EMC Networking S4048-ON switches running Dell Networking
OS 9.x (firmware 9.x). If your switches are running firmware Dell Networking OS 10.x (firmware 10.x), follow
the steps in section 3 instead.
Table 2 provides an overview of the switch configuration.
Switch specifications (OS 9.x)
Dell EMC Networking S4048-ON
Switch vendor
Dell EMC
Switch model
S4048-ON
Switch firmware
9.x (9.10.0.0 or above)
Note: For proper functionality, the switch must be at the switch firmware version shown in Table 2 before
proceeding with this configuration. Using firmware other than the versions specified in this document may
have unpredictable results.
Note: Firmware downloads and documentation can be found at Dell.com/support.
2.1 Dell EMC recommended switch configuration
The steps in this section show 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).
2.1.1 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 the 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.

Switch configuration (OS 9.x)
9 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
2.1.2 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.
2.1.3 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 <ipaddress> <mask>
Dell(conf-if-ma-1/1)#exit
2.1.4 Configure route for OOB management port (optional)
Dell(conf)#management route <X.Y.Z.0>/24 <A.B.C.1>
Note: In the previous command, <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 prior example assumes a class C subnet mask.
2.1.5 Configure login credentials
Dell(conf)#username admin privilege 15 password 0 <yourpassword>
Dell(conf)#enable password level 15 0 <yourpassword>

Switch configuration (OS 9.x)
10 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
2.1.6 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
2.1.7 Enable Jumbo frames
Dell#configure
Dell(conf)# interface range tengigabitethernet 1/1–48
Dell(conf -if-range-te-1/1-48)#mtu 12000
2.1.8 Configure flow control
Dell(conf -if-range-te-1/1-48)#flowcontrol rx on tx off
2.1.9 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
2.1.10 Configure port channel for LAG
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

Switch configuration (OS 9.x)
11 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
2.1.11 Configure QSFP ports for LAG
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
2.1.12 Save configuration
Dell#copy running-config startup-config
2.1.13 Configure additional switch
Repeat the commands from section 2.1 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.

Switch configuration (OS 9.x)
12 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
2.2 Configure Data Center Bridging (DCB) (optional)
Use the following commands to enable DCB mode on the switch.
Note: You must complete the Dell EMC recommended switch configuration steps in section 2.1 before
configuring the switch for DCB mode.
2.2.1 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
2.2.2 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
2.2.3 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.
2.2.4 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

Switch configuration (OS 9.x)
13 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
2.2.5 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
2.2.6 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.
2.2.7 Save configuration
Dell#copy running-config startup-config
2.2.8 Configure additional switch
Repeat the commands from section 2.2 to configure DCB on additional switches.
2.3 Revert 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 2.1. 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 downtime. The arrays will temporarily lose communication
with each other. Power off all arrays and hosts connected to the SAN before proceeding with these steps.
2.3.1 Disable DCB
Dell#configure
Dell(conf)#no dcb enable
Dell(conf)#exit

Switch configuration (OS 9.x)
14 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
2.3.2 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
2.3.3 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: The host NICS must also be updated with matching VLAN information.
Use the following steps to configure the native VLAN on the switch.
Dell#configure
Dell(conf)#no interface vlan <vlan-id>
2.3.4 Save configuration
Dell#copy running-config startup-config
2.3.5 Reload
Dell#reload
System configuration has been modified. Save? [yes/no]yes
Proceed with reload [confirm yes/no]yes
Note: The switch will reboot.
2.3.6 Verify DCB status
Dell#show dcb
DCB Status : Disabled
2.3.7 Configure additional switch
Repeat the commands from section 2.3 to disable DCB on any additional switches.

Switch configuration (OS 9.x)
15 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
2.4 Optional stack configuration
Note: If choosing to use a stack configuration instead of LAG, follow the instructions in this section instead of
those in section 2.1.
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.
2.4.1 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.
2.4.2 Configure stack on the first switch
Dell>enable
Note: 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
2.4.3 Delete startup configuration on the second switch
Dell>enable
Dell#delete startup-config
Proceed to delete startup-config [confirm yes/no]yes
Dell#reload
System configuration has been modified. Save? [yes/no]no
Proceed with reload [confirm yes/no]yes
Note: The switch will reboot.

Switch configuration (OS 9.x)
16 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
2.4.4 Configure stack on the second switch
Dell>enable
Dell#stack-unit 1 renumber 2
Note: After confirming the 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
2.4.5 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.
2.4.6 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
2.4.7 Configure route for OOB management port (optional)
Dell(conf)#management route <X.Y.Z.0>/24 <A.B.C.1>
Note: In the previous command, <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 prior example assumes a class C subnet mask.

Switch configuration (OS 9.x)
17 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
2.4.8 Configure login credentials
Dell(conf)#username admin privilege 15 password 0 <yourpassword>
Dell(conf)#enable password level 15 0 <yourpassword>
2.4.9 Configure 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
2.4.10 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 switch documentation.

Switch configuration (OS 10.x)
18 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
3 Switch configuration (OS 10.x)
This section provides steps to configure Dell EMC Networking S4048-ON switches running Dell Networking
OS 10.x (firmware 10.x). If your switches are running Dell Networking OS 9.x (firmware 9.x), follow the steps
in section 2 instead.
Table 3 provides an overview of the switch configuration.
Switch specifications (OS 10.x)
Dell EMC Networking S4048-ON
Switch vendor
Dell EMC
Switch model
S4048-ON
Switch firmware
10.3.1 or above
Note: For proper functionality, the switch must be at the switch firmware version shown in Table 3 before
proceeding with this configuration. Using firmware other than the versions specified in this document may
have unpredictable results.
Note: Firmware downloads and documentation can be found at Dell.com/support.
3.1 Dell EMC recommended switch configuration
These steps show 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).
3.1.1 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.
3.1.2 Check firmware version
OS10# show version
Note: If the active version displayed here is not 10.3.1 or above, visit Dell.com/support and download the
latest update for the switches.

Switch configuration (OS 10.x)
19 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
3.1.3 Delete startup configuration
Note: The following commands will delete all configuration settings.
OS10# delete startup-configuration
Proceed to delete startup-config [confirm yes/no(default)]yes
OS10# reload
System configuration has been modified. Save? [yes/no]no
Proceed to reboot the system? [confirm yes/no]yes
Note: The switch will reboot.
3.1.4 Configure out of band (OOB) management port
After the startup configuration is deleted, the factory default password is admin.
OS10# configure terminal
OS10(config)# interface mgmt 1/1/1
OS10(conf-if-ma-1/1/1)# no ip address dhcp
OS10(conf-if-ma-1/1/1)# ip address <ipaddress>/<subnet>
OS10(conf-if-ma-1/1/1)# exit
OS10(config)#
3.1.5 Configure login credentials
OS10(config)# username admin password $0$<password>
3.1.6 Configure QSPF ports to 4 x 10GbE breakout ports
QSFP ports can be configured as breakouts to be used with 10GbE iSCSI storage or server network
adapters. To configure these ports as 4 x 10GbE ports, use the following commands.
OS10(config)# interface breakout 1/1/<port-number> map 10g-4x
OS10(config)# exit
OS10#
Use the following command to check port interface status.
OS10# show interface status

Switch configuration (OS 10.x)
20 Dell EMC Networking S4048-ON Switch Configuration Guide for Dell PS Series SANs | SCG1026
3.1.7 Enable switch ports
Switch ports are enabled and are configured for switchport mode access by default for S4048 switches. If
choosing to reconfigure the ports, use the following steps.
Option 1: Enable ports individually by entering the port number.
OS10# configure terminal
OS10(config)#interface ethernet 1/1/1
Note: For ports configured as 4 x 10GbE breakout ports, use the following command in which 1/1 represents
the switch number, <xx> represents the port number, and <yy> represents sub port number:
OS10(conf)#interface range ethernet 1/1/<xx>:<yy>
OS10(conf-if-eth1/1/1)# switchport mode access
OS10(conf-if-eth1/1/1)# no shutdown
OS10(conf-if-eth1/1/1)# exit
Option 2: Enable multiple ports at once using the range parameter.
OS10# configure terminal
OS10(config)# interface range ethernet 1/1/1–1/1/48
Note: For ports configured as 4 x 10GbE breakout ports, use the following command in which 1/1 represents
the switch number, <xx> represents the port number, and <yy> represents sub port number:
OS10(conf)#interface range ethernet 1/1/<xx>:<yy>-1/1/<xx>:<yy>
OS10(conf-range-eth1/1/1-1/1/48)# switchport
OS10(conf-range-eth1/1/1-1/1/48)# no shutdown
OS10(conf-range-eth1/1/1-1/1/48)# exit
3.1.8 iSCSI enable
This section describes enabling iSCSI auto-detection of attached storage arrays and switch auto-
configuration. PS Series and Dell EMC SC Series storage arrays will be detected by the switch when iscsi is
enabled. The switch will auto-configure for Jumbo frames with MTU 9216 and flowcontrol receive on, transmit
off for all the ports. The ports detected to be connected to the above storage units will be auto-configured as
spanning-tree edge ports and unicast storm control is disabled.
OS10(config)# iscsi enable
OS10(config)# iscsi session-monitoring enable