Re: connecting EX4300 VC to EX4600 non-VC

Hi,

I believe LACP [802.3ad] LAG can only be setup between 2 logical switches.

In this case, there's 3 logical switches EX4300VC, EX4600A and EX4600B.

LACP on EX4600B stays down because EX4300VC sees a different system ID other than the other LAG partner i.e EX4600A. Thus, no synchronisation flag is sent back in the LACP PDU to EX4600B.

MC-LAG allows for LAG over 2 different logical partners.

MC-LAG is supported as fromJunos OS 13.2X51-D25 on EX4600.

https://pathfinder.juniper.net/feature-explorer/feature-info.html?fKey=4070&fn=Multichassis+link+aggregation+(MC-LAG)

Cheers,

Ashvin