Hi all However this sounds like a basic question, I can't find a correctly documented answer on that one so I decided to ask the mailing list.
I have a port-channel configured between 2 switches (SW_1/SW_2, 2 ports G0/3 & G0/4 each) One of the ports on the port-channel goes into Suspended state (SW_1 G0/4), causing the remote one to go into Individual state (SW_1 G0/4) (here I just did it configuring a mismatch on the interface, but this is a behaviour we have with Nexus vPC after reload) On outputs, 1st switch interface is suspended : SW_1(config-if)#do sh ether su Group Port-channel Protocol Ports ------+-------------+-----------+----------------------------------------------- 1 Po1(SU) LACP Gi0/3(P) Gi0/4(s) On 2nd switch, interface goes into Stand-alone since it doesn't receive any LACP BPDU: SW_2#sh ether su Group Port-channel Protocol Ports ------+-------------+-----------+----------------------------------------------- 1 Po1(SU) LACP Gi0/3(P) Gi0/4(I) What confuses me now is that the port G0/4 on SW_1 (suspended) doesn't forward traffic (not on STP) while on SW_2 (Stand-alone) it seems to forward (FWD as an individual port on STP) So does the port in Suspended state (SW_1 G0/4) still process input traffic which cames from SW_2 G0/4? or is there something I miss ? SW_1(config)#do sh spann vlan 1 Interface Role Sts Cost Prio.Nbr Type ------------------- ---- --- --------- -------- -------------------------------- Po1 Desg FWD 4 128.56 P2p SW_2#sh spann vl 1 Interface Role Sts Cost Prio.Nbr Type ------------------- ---- --- --------- -------- -------------------------------- Gi0/4 Desg FWD 4 128.4 P2p Po1 Root FWD 4 128.56 P2p This seems not to have any impact, but I would like to understand how it works exactly. I thought that LACP would suspend G0/4 port on SW_2 as well as it is member of LACP channel but not forming. I found the "port-channel standalone disable" does this on Cat65k (& an equivalent on Nexus) but nothing on 2960 or 3750; moreover, it seems it is designed for different designs. Would anybody have any clue or know any good resource or link for this (rfc-like) ? Many thanks in advance. Regards Gilles. ___________________________________________________________ Marie-Charline vit avec un ministre de 30 ans son aïné. Qui est ce ministre socialiste ? Réponse ici http://people.voila.fr/people/actu-stars/personnalites/pierre-moscovici-sa-compagne-marie-charline-pacquot-se-devoile-people_10042.html _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
