Dell Cisco Catalyst 3850 PS Series Manuale utente

A Dell EMC Deployment and Configuration Guide

Cisco Catalyst 3850

Switch Configuration Guide for Dell PS Series SANs

Dell Storage Engineering

October 2016

2 Cisco Catalyst 3850 Switch Configuration Guide for Dell PS Series SANs | SCG3299

Revisions

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 ANY KIND.

and names mentioned herein may be trademarks of their respective companies.

Date

Description

October 2016

Initial release

3 Cisco Catalyst 3850 Switch Configuration Guide for Dell PS Series SANs | SCG3299

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 Startup configuration file ..................................................................................................................................... 6

2.3 Basic system configuration ................................................................................................................................. 6

2.4 Configure Jumbo Frames, LLDP, and Spanning Tree ....................................................................................... 7

2.5 Configure policy-map and increase queue multiplier ......................................................................................... 8

2.6 Configure port-channel interfaces ...................................................................................................................... 8

2.7 Configuring edge-ports ....................................................................................................................................... 9

2.8 Save configuration .............................................................................................................................................. 9

2.9 Configure additional switch ................................................................................................................................. 9

AAdditional resources ................................................................................................................................................... 10

4 Cisco Catalyst 3850 Switch Configuration Guide for Dell PS Series SANs | SCG3299

1 Introduction

This document illustrates how to configure Cisco® Catalyst 3850 switches for use with Dell™ PS Series storage

using Dell best practices. The recommended configuration uses a link aggregation group (LAG) for inter-switch

connections.

If you are following the Rapid EqualLogic Configuration steps, use sections 1 and 2 in this switch

configuration guide.

For more information on Dell PS series SAN design recommendations, see the PS Series Configuration

Guide.

1.1 Audience

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

iSCSI SAN and is intended for storage or network administrators and deployment personnel.

1.2 Switch details

Table 1 provides an overview of the switch configuration. This switch configuration guide covers setup

instructions for all Catalyst 3850 switch models.

Switch specifications

Cisco Catalyst 3850

Switch vendor

Cisco

Switch model

Catalyst 3850

Switch firmware

03.07.04E or later

16.3.1 or later

Note: For proper functionality, the switch must be at the firmware version shown in Table 1 before

proceeding with 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 Catalyst 3850 Switch Configuration Guide for Dell PS Series SANs | SCG3299

1.3 Cabling diagram

The cabling diagram shown in Figure 1 represents the Dell recommend method for deploying your servers

and PS Series storage arrays.

Cabling diagram

Note: Figure 1 shows the Catalyst 3850 with 10 Gb SFP+ interfaces used for the port-channel.

6 Cisco Catalyst 3850 Switch Configuration Guide for Dell PS Series SANs | SCG3299

2 Dell recommended switch configuration

These steps show you how to configure two Cisco Catalyst 3850 switches. The switches are interconnected

using the 10 Gbps ports configured as a LAG.

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

SAN for iSCSI traffic.

2.1 Hardware configuration

1. Power on both switches.

2. Connect a serial cable to the management port.

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 2 x 10 Gb Ethernet ports, at least, between switch 1 and switch 2 as shown in Figure 1.

These are used as switch interconnect links.

2.2 Startup configuration file

Note: This example assumes a switch at its default configuration settings. Always back up your

configuration settings prior to performing any configuration changes.

Switch>enable

Switch#erase startup-config

Erasing the nvram filesystem will remove all configuration files! Continue?

[confirm]

Switch#reload

2.3 Basic system configuration

The following steps will setup the initial configuration for the Cisco switch.

Would you like to enter the initial configuration dialog? [yes/no]: yes

Would you like to enter basic management setup? [yes/no]: yes

Enter host name [Switch]: Switch

The enable secret is a password used to protect access to privileged EXEC and

configuration modes. This password, after entered, becomes encrypted in the

configuration.

Enter enable secret: <password>

7 Cisco Catalyst 3850 Switch Configuration Guide for Dell PS Series SANs | SCG3299

The enable password is used when you do not specify an enable secret password,

with some older software versions, and some boot images.

Enter enable password: <password>

The virtual terminal password is used to protect access to the router over a

network interface.

Enter virtual terminal password: <password>

Setup account for accessing HTTP server? [yes]: no

Configure SNMP Network Management? [no]: <Enter your choice>

Note: The current interface summary is displayed here.

Enter interface name used to connect to the management network from the above

interface summary: GigabitEthernet0/0

Configuring interface GigabitEthernet0/0:

Configure IP on this interface? [no]: yes

IP address for this interface: <management ip address>

Subnet mask for this interface [255.0.0.0]: <subnet mask>

Note: The configuration command script is displayed here.

[0] Go to the IOS command prompt without saving this config.

[1] Return back to the setup without saving this config.

[2] Save this configuration to nvram and exit.

Enter your selection [2]: 2

2.4 Configure Jumbo Frames, LLDP, and Spanning Tree

Switch(config)#system mtu 9198

Switch(config)#lldp run

Switch(config)#spanning-tree mode pvst

8 Cisco Catalyst 3850 Switch Configuration Guide for Dell PS Series SANs | SCG3299

2.5 Configure policy-map and increase queue multiplier

Switch(config)#policy-map single-queue-buffer

Switch(config-pmap)#class class-default

Switch(config-pmap-c)#bandwidth percent 100

Switch(config-pmap-c)#queue-buffers ratio 100

Switch(config-pmap-c)#exit

Switch(config-pmap)#exit

Note: Cisco issue CSCuu14019 and other related issues require the following buffer multiplier command to

prevent output queue drops.

Switch(config)#qos queue-softmax-multiplier 1200

2.6 Configure port-channel interfaces

Switch(config)#interface port-channel 1

Switch(config-if)#switchport

Switch(config-if)#flowcontrol receive on

Switch(config-if)#exit

Note: 10 Gb ports 1/1/3 and 1/1/4 are used for the port-channel. Change the port number in the following

command if using other ports for the port channel between two switches.

Switch(config)#interface range tenGigabitEthernet 1/1/3 - 4

Switch(config-if-range)#no shutdown

Switch(config-if-range)#channel-group 1 mode active

Switch(config-if-range)#service-policy output single-queue-buffer

Switch(config-if-range)#exit

9 Cisco Catalyst 3850 Switch Configuration Guide for Dell PS Series SANs | SCG3299

2.7 Configuring edge-ports

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

specify a range of ports to configure. This section enables link-level flow control (802.3x), portfast, and service

policy.

Switch(config)#interface range gigabitEthernet 1/0/1 –24

Note: Configure all the 48 ports for the 48 port model of the switch using the following command.

# interface range gigabitEthernet 1/0/1 –48

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

Switch(config-if-range)#spanning-tree portfast

Switch(config-if-range)#service-policy output single-queue-buffer

Switch(config-if-range)#switchport

Switch(config-if-range)#no shutdown

Switch(config-if-range)#exit

Switch(config)#exit

2.8 Save configuration

Switch#copy running-config startup-config

2.9 Configure additional switch

Repeat the commands from sections 2.1 through 2.8 to configure the second switch.

10 Cisco Catalyst 3850 Switch Configuration Guide for Dell PS Series SANs | SCG3299

A Additional resources

Dell.com/support is focused on meeting customer needs with proven services and support.

Dell TechCenter is an online technical community where IT professionals have access to numerous resources

for Dell software, hardware and services.

Storage Solutions Technical Documents on Dell TechCenter provide expertise that helps to ensure customer

success on Dell Storage platforms.

See the following additional referenced or recommended Dell publications:

 Dell PS Series Configuration Guide

 Dell Storage Compatibility Matrix

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