Linkagg LCAP size

[ydeschoe]

All,

Today we successfully migrated towards the VC setup on one part of our 10K switches, this without any major outage (small config error)

Now I have a question, this is following me nothing to do with the VC setup.

We have linkagg lacp channels with a size of 2 or 4 and we would like to increase the size.

Is this possible online or offline

We we try to do it when they are enable we get a error that the lacp is in use

We disable the lacp and then we get the error that the lacp already exist

this is the command we used

linkagg lacp agg XX size 4 and then we get the error that the lacp already exist,

does this mean that we need to remove the lacp config and recreate it with the new size.

Software used is 7.3.2.439.R01

Thanks in advance

Yves

[devnull]

AFAIK yes.. you can't change the size while it exists.

My workaround:
create a new linkagg with the correct size and move the ports from one linkagg to the other. I would disable the ports as i am not sure what happens if you have have the ports in one linkagg and half in the other, while the other side it is still one linkagg..
You will of course have a small downtime.

e.g.

Code: Select all

linkagg lacp agg 1 size 2 admin-state enable 
linkagg lacp agg 1 name "To Stack"
linkagg lacp agg 1 actor admin-key 1
linkagg lacp port 1/1/2 actor admin-key 1
linkagg lacp port 2/1/2 actor admin-key 1

Code: Select all

linkagg lacp agg 2 size 4 admin-state enable 
linkagg lacp agg 2 name "To Stack"
linkagg lacp agg 2 actor admin-key 2
interfaces 1/1/2 admin-state disable
interfaces 2/1/2 admin-state disable

no linkagg lacp port 1/1/2
linkagg lacp port 1/1/2 actor admin-key 2
interfaces 1/1/2 admin-state enable

no linkagg lacp port 2/1/2
linkagg lacp port 2/1/2 actor admin-key 2
interfaces 2/1/2 admin-state enable

If you want to further minimize the downtime you can create a second linkagg on both switches and move one port to the new linkagg. STP should disable that, once you remove the other port stp should go to forwarding (RSTP in <1sec)