Upgrading VSS link from 4 x 10G to 2 x 40G

[Olivier ARRIGHI]

Hi folks, I have 2 switches C6824-X-LE-40G running VSS on 4 x 10Gbits/s ports. I'm willing to upgrade the VSL to 2 x 40Gbits/ links.

Any way to do it without disrupting traffic? (everything is attached to this stack correctly using etherchannels dispatched on both switches.

Can I build a second VSL with the 40G ports and then remove the 10G VSL?

thanks for any procedure to do it.

olivier

[Reza Sharifi]

Hi,

I have never done this before but in general, there should not be much traffic on the VLS links. It is mainly used for some multicast traffic and any device that is not duly connected to both chassis. So, 4 10Gig links provide plantly of bandwidth.  I usually use 2 10Gig and have never seen any issues with bandwidth.

HTH

[Joseph W. Doherty]

". . . there should not be much traffic on the VLS links."

BTW, that's correct for a properly designed VSS system (everything dual connected) and for normal operation. However, where the VSL might be slammed is when a line card on a chassis fails. Then all the egress bandwidth on the failed card, on that chassis, would need to be redirected to the VSS peer.