Migration to Port-Channel from 'hard coded' 100BaseX Trunk

[SteveGodfrey]

I need to increase the bandwidth of a trunk link between a 7513 and 6509, currently there are 23 subinterfaces under a single Fast Ethernet interface which is trunked using ISL to the 6509. Each sub-interface is configured with a HSRP address used for inter VLAN routing.

I intend to configure a Port-Channel and duplciate the sub-interface configuration. While the current Fast Ethernet trunk is active.

My question is can two seperately configured trunk links exist on a single device? Ideally I'd create the Port Channel and assign spare IP addresses to the sub-interfaces and when the time comes to swap to this new trunnk link just move the HSRP addresses across.

[lgijssel]

Hello Steve,

May I suggest a procedure to achieve this?

First of all, you will have downtime during the switchover.

I would use a script to:

1: remove the ip adresses from the FE

2: create the port channel

3: assign the same IP's to the port channel

4: make the existing FE part of the channel

Paste this script to the console. After this it should be possible to add a second link to the channel. With careful preparation (i.e. a script with no errors) you can make the switch witin a minute. In my opinion, this is the safest method.

Regards,

Leo