[c-nsp] Migrating multi 1Gb port-chan member ints to 10G .....possible withot having to create a new portchan?

[CiscoNSP List]

Hi Everyone,


Ive researched this, and the info Ive read s not entirely definitive (I dont have an opportunity to test  the migration in a lab unfortunately_


We have an existing port-chan on an asr1006, with 4 x 1Gb ports....egress from ASR1006 on the member ports is very balanced, but unfortunately, ingress, we are always seeing 2 links basically maxing out (Other end of portchan is 4500x(VSS stack, with "primary" switch, being the one with the 2 over active ports.) ....we've resigned to the fact that we will need to go 10G to fix the "issue"....Now the problem is that the existing portchan has 100's of subunterfaces, so we dont want to have to create a "new" portchan with the 2 x 10G links, and migrate all the subinterfaces....from what Ive read, the member interfaces of the etherchan need to be of the same "Speed + Duplex"....some go even further and say the same "physical" ty;e (i.e. 1Gb SM -> 1Gb SM)....but I have also read where people have added a 10G int to an existing portchan (That only has 1Gb members), and it "worked".....Can anyone please confirm if this is possible?  i.e. set the 10G interfaces to 1000/Full, then add them to the existing portchan, delete the "old" 1Gb member ints, then change the 10Gb interfaces to auto?  I really hope there is someway that this can be achieved without having to migrate all the subints to a new portchan....ant suggestions/experiences are greatly appreciated.


Cheers