Cisco Nexus 9372PX User manual

A Dell EMC Deployment and Configuration Guide

Cisco Nexus 9372PX

Switch Configuration Guide for Dell PS Series SANs

Dell EMC Engineering

June 2017

2 Cisco Nexus 9372PX Switch Configuration Guide for Dell PS Series SANs | SCG3665

Revisions

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.

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.

Date

Description

June 2017

Initial release

3 Cisco Nexus 9372PX Switch Configuration Guide for Dell PS Series SANs | SCG3665

Table of contents

Revisions.............................................................................................................................................................................2

1Introduction...................................................................................................................................................................4

1.1 Document conventions.......................................................................................................................................4

1.2 Audience.............................................................................................................................................................4

1.3 Switch details......................................................................................................................................................4

1.4 Cabling diagram..................................................................................................................................................5

2Dell EMC recommended switch configuration .............................................................................................................6

2.1 Hardware configuration ......................................................................................................................................6

2.2 Delete startup configuration................................................................................................................................6

2.3 Run the basic system configuration....................................................................................................................7

2.4 Enable LLDP.......................................................................................................................................................8

2.5 Disable Data Center Bridging (DCB)..................................................................................................................8

2.6 Configure the vPC domain .................................................................................................................................8

2.7 Configure the Port-Channel................................................................................................................................9

2.8 Enable Jumbo Frames on edge ports ................................................................................................................9

2.9 Enable link level flow control (802.3x) on edge ports.........................................................................................9

2.10 Configure portfast on edge ports......................................................................................................................10

2.11 Enable switch ports ..........................................................................................................................................10

2.12 Save configuration............................................................................................................................................10

2.13 Configure additional switch...............................................................................................................................10

ATechnical support and resources...............................................................................................................................11

A.1 Related resources ............................................................................................................................................11

4 Cisco Nexus 9372PX Switch Configuration Guide for Dell PS Series SANs | SCG3665

1 Introduction

This document illustrates how to configure a Cisco®Nexus 9372PX switch for use with Dell™PS Series

storage using Dell EMC best practices.

Note: For more information on PS Series SAN design recommendations, see the Dell PS Series

Configuration Guide.

1.1 Document conventions

Table 1 lists the formatting conventions used in this document.

Document conventions

Format

Description

Example

Bold

User input

Dell>enable

Italic

Placeholder or variable

ip address

Bold italic

User input (variable)

Dell>my password

Separate variables

1.2 Audience

This switch configuration guide describes a verified configuration following Dell EMC best practices for a

dedicated 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.

Switch specifications

Cisco Nexus 9372PX

Switch vendor

Cisco

Switch model

Nexus 9372PX

Switch firmware

7.0(3)I5(2)

Note: For proper functionality, the switch must be at the firmware version shown in Table 2 before

proceeding with this configuration. Using previous firmware versions may have unpredictable results.

Note: The latest firmware updates and documentation can be found at: www.cisco.com. This site requires a

5 Cisco Nexus 9372PX Switch Configuration Guide for Dell PS Series SANs | SCG3665

1.4 Cabling diagram

The cabling diagram shown in Figure 1 represents the method recommended by Dell EMC for deploying

servers and PS Series arrays.

Cabling diagram

6 Cisco Nexus 9372PX Switch Configuration Guide for Dell PS Series SANs | SCG3665

2 Dell EMC recommended switch configuration

Use the following steps to configure the Cisco Nexus 9372PX switch.

Note: The configuration steps in this section are only recommended when the switch is used as a dedicated

SAN for iSCSI traffic (not shared with LAN traffic).

2.1 Hardware configuration

1. Power on the chassis.

2. Connect a serial cable to the active supervisor management port.

3. Using PuTTY or another terminal utility, open a serial connection session to the switch.

4. Open a 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.

2.2 Delete startup configuration

Note: This example assumes a switch at its default configuration settings. Using the write erase

command will set the startup configuration file to its default settings. Always back up the configuration

settings prior to performing any configuration changes

switch#write erase

Warning: This command will erase the startup-configuration

Do you wish to proceed anyway ? (y/n) [n]y

switch#reload

This command will reboot the system

Do you want to continue? (y/n) [n]y

Note: The switch will reboot.

7 Cisco Nexus 9372PX Switch Configuration Guide for Dell PS Series SANs | SCG3665

2.3 Run the basic system configuration

The following steps use the setup utility to configure connectivity for basic management of the system.

After the switch fully reboots, the following prompts will appear:

Abort Power On Auto Provisioning and continue with normal setup ?(yes/no)[n]:y

---- System Admin Account Setup ----

Do you want to enforce secure password standard (yes/no):yes

Enter the password for "admin":my password

Confirm the password for "admin":my password

---- Basic System Configuration Dialog VDC: 1 ----

This setup utility will guide you through the basic configuration of

the system. Setup configures only enough connectivity for management

of the system.

Please register Cisco Nexus9000 Family devices promptly with your

supplier. Failure to register may affect response times for initial

service calls. Nexus9000 devices must be registered to receive

entitled support services.

Press Enter at anytime to skip a dialog. Use ctrl-c at anytime

to skip the remaining dialogs.

Would you like to enter the basic configuration dialog (yes/no):yes

Create another login account (yes/no) [n]:n

Configure read-only SNMP community string (yes/no) [n]:n

Configure read-write SNMP community string (yes/no) [n]:n

Enter the switch name :my switch name

Continue with Out-of-band (mgmt0) management configuration? (yes/no) [y]:y

Mgmt0 IPv4 address :my IP address

Mgmt0 IPv4 netmask :my netmask

Configure the default gateway? (yes/no) [y]:y

IPv4 address of the default gateway :my gateway

Configure advanced IP options? (yes/no) [n]:n

Enable the telnet service? (yes/no) [n]:y

Enable the ssh service? (yes/no) [y]:n

Configure the ntp server? (yes/no) [n]:n

Configure default interface layer (L3/L2) [L2]:L2

Configure default switchport interface state (shut/noshut) [noshut]:shut

Configure CoPP system profile (strict/moderate/lenient/dense) [strict]:

8 Cisco Nexus 9372PX Switch Configuration Guide for Dell PS Series SANs | SCG3665

The following configuration will be applied:

Would you like to edit the configuration? (yes/no) [n]:n

Use this configuration and save it? (yes/no) [y]:y

[########################################] 100%

Copy complete.

Log into the switch using the credentials created previously.

2.4 Enable LLDP

switch#config

switch(config)#feature lldp

switch(config)#interface ethernet 1/1-48

switch(config-if-range)#lldp receive

switch(config-if-range)#lldp transmit

switch(config-if-range)#exit

2.5 Disable Data Center Bridging (DCB)

All steps in this section are required in order to properly disable DCB.

Note: By default, DCB is enabled. This document provides steps to disable DCB. Perform all operations

during a maintenance window, because a temporary loss of communication between host servers and

storage arrays may occur.

switch(config)#lldp tlv-select dcbxp

switch(config)#copy running-config startup-config

switch(config)#no lldp tlv-select dcbxp

switch(config)#copy running-config startup-config

2.6 Configure the vPC domain

switch(config)#feature lacp

switch(config)#feature vpc

switch(config)#vpc domain 1

switch(config-vpc-domain)#peer-keepalive destination peer IP address

--------:: Management VRF will be used as the default VRF ::--------

switch(config-vpc-domain)#exit

9 Cisco Nexus 9372PX Switch Configuration Guide for Dell PS Series SANs | SCG3665

2.7 Configure the Port-Channel

switch(config)#interface port-channel 1

switch(config-if)#switchport mode trunk

switch(config-if)#spanning-tree port type network

switch(config-if)#vpc peer-link

switch(config-if)#mtu 9216

switch(config-if)#flowcontrol receive on

switch(config-if)#flowcontrol send on

switch(config-if)#exit

switch(config)#interface ethernet 1/49-50

switch(config-if)#switchport mode trunk

switch(config-if)#channel-group 1

switch(config-if)#mtu 9216

switch(config-if)#no shutdown

switch(config-if)#exit

2.8 Enable Jumbo Frames on edge ports

switch(config)#system jumbomtu 9216

switch(config)#interface ethernet 1/1-48

switch(config-if-range)#mtu 9216

2.9 Enable link level flow control (802.3x) on edge ports

Perform this step for each individual port that is connected to a storage controller or a host server interface

port, or specify a range of ports to configure.

switch(config-if-range)#priority-flow-control mode off

switch(config-if-range)#flowcontrol send off

switch(config-if-range)#flowcontrol receive on

switch(config-if-range)#exit

Note: Optionally, to reduce egress port packet drops, use the following command to enable the ultra-burst

feature mode:

switch(config)# hardware qos ns-buffer-profile ultra-burst

10 Cisco Nexus 9372PX Switch Configuration Guide for Dell PS Series SANs | SCG3665

2.10 Configure portfast on edge ports

switch(config)#interface ethernet 1/1-48

switch(config-if-range)#spanning-tree port type edge

Warning: edge port type (portfast) should only be enabled on ports connected to

a single host. Connecting hubs, concentrators, switches, bridges, etc… to this

interface when edge port type (portfast) is enabled, can cause temporary

bridging loops. Use with CAUTION.

Edge Port Type (Portfast) will be configured in 96 interfaces due to the range

commend but will only have effect when the interfaces are in a non-trunking

mode.

2.11 Enable switch ports

The following example enables a range of ports. If preferred, enable individual ports as needed.

switch(config-if-range)#shutdown

switch(config-if-range)#no shutdown

switch (config-if-range)#exit

switch(config)#exit

2.12 Save configuration

switch# copy running-config startup-config

switch# reload

2.13 Configure additional switch

Repeat the steps in sections 2.1 through 2.12 to configure the second switch.

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