NEXUS 5K FEX CHEAT SHEET

Nexus Switches-Nexus Cheat Sheet

Nexus is one of the dominant switches in data centers, most companies already rolled out Nexus Switches like 7k,5k and Fabric Extender 2k. Nexus 1k series is for low latency applications.

The following commands are normally used for Configuring/monitoring Nexus Switches.

Feature- add a feature in switch   feature ssh

Interface

Interface designation   - int eth slot#/port#

Channel-group # mode active/passive

Int po# ( port-channel)

Example

Channel-group 10 mode active
Int portchannel10
Switchport mode access

CAM table

To find the port of a host using mac address

show mac-address-table address [mac address]

FCOE

Enable fcoe mode

Int x/y

Fcoe mode on/auto

VFC

Interface vfc10

Bind interface e1/10

QOS For FCOE

Class-map class-fcoe

Match cos #

ZONING

VSAN- Virtual Storage Network

Zone name name vasn #

Member pwwn#,fcalias

Zoneset name

To activate

Zoneset activate name [zonename] vsan #

Example

int fc1/24

vsan database

vsan 102 interface fc1/24

vsan 202 wwn 10:00:00:00:c9:62:ab:a7 fcid 0x010027 dynamic

fcalias name SQL31_hba1_p0 vsan 102  

fcalias name SQL31_hba1_p0 vsan 102

    member pwwn 10:00:00:00:c9:62:ab:a7

zone name disql31_hba1_p0_4634_10f0 vsan 102

zoneset name Zoneset_B_01242012 vsan 102

zone sql31_hba1_p0_4634_10f0 to zoneset Zoneset_B_01242012 on VSAN 102

zoneset activate name Zoneset_B_01242012 vsan 102

FEX 

For example 2148T has 48x 1ge server ports and 4x10GE uplinks

It is managed by 5k or 7k

There is not PORT CHANNEL config from FEX to server ports

It appears as a line card of Nexus 5k

FEX config managed by 5k and local memory storage for the config

FEX is discovered by SDP protocol

Define number of uplinks

Conf t

Fex 100

Pinning max-links 4

Attach a FEX to interface

Conf t

Int e3/1

Switchport mode fex-fabric

fex associate 100

exit

verify FEX

show fex 100

or show fex 100 detail

other commands are

show inventory fex 100

show version fex 100

show environment fex 100

show diagnostic result fex 100

show logging onboard fex 100

reload fex 100

show tech-support fex 100

Attach fex

Attach fex 100

reset module in nexus switch

(config)# slot #

	(config-slot)# port 9-16 type fc (config-slot)# port 1-8 type ethernet (config-slot)# copy running-config startup-config (config-slot)# poweroff module 3 (config)# no poweroff module 3