Summary of disconnect procedure to be performed for each example

When performing initial configurations or making changes to existing configurations that might have an impact on Spanning Tree (such as changing link aggregation), it is recommended that you leave connections uncabled or shut down prior to making the configuration changes. This reduces the likelihood of any temporary Spanning Tree loops and possible network-down conditions that might result in the process of adding or changing configurations.

￿Shut down the ports on GbESM_1 and GbESM_2

/oper/port EXT1/dis /oper/port EXT2/dis

￿Shut down the ports on Core1 and Core2

conf t

int range g0/1-2 shut

Cisco 3560G switch configuration

In this topology, each Cisco switch connects two ports (g0/1 and g0/2) to its adjoining Nortel GbESM (EXT1 and EXT2). These aggregated links are to carry VLAN 5, 10, 20, and 99. VLAN 99 is meant to be a management VLAN, and the only blade server in the chassis to have access to it is blade server 4. The native VLAN here is 5.

In the switch configuration mode, create the VLANs and IP interfaces first, as shown in Example 7-1.

Example 7-1 Create the VLANs and IP interfaces first

:

conf t

!

vlan 5

name native vlan 10

name vlan_green vlan 20

name vlan_red vlan 99

name mgmt

By issuing do sh vlan, you can see the intended VLAN layout, as shown in Example 7-2.

Example 7-2 Verifying the VLAN setup

Core1(config)#do sh vlan

VLAN

Name

Status

Ports

 

 

----

--------------------------------

---------

-------------------------------

1

default

active

Gi0/3, Gi0/4, Gi0/5, Gi0/6

 

 

 

Gi0/7, Gi0/8, Gi0/9, Gi0/10

 

 

 

Gi0/11,

Gi0/12, Gi0/13,

Gi0/14

 

 

 

Gi0/15,

Gi0/16, Gi0/17,

Gi0/18

 

 

 

Gi0/19,

Gi0/20, Gi0/21,

Gi0/22

 

 

 

Gi0/25,

Gi0/26, Gi0/27,

Gi0/28

5

native

active

 

 

 

10

vlan_green

active

 

 

 

20

vlan_red

active

 

 

 

99

mgmt

active

 

 

 

1002

fddi-default

act/unsup

 

 

 

Chapter 7. Nortel Networks L2/3 GbESM configuration and network integration 71

Page 85
Image 85
IBM L2/3 manual Cisco 3560G switch configuration, Example 7-1 Create the VLANs and IP interfaces first