Re: Fabricpath spine learns tons of MAC, why?

Thanks, William.

You are right on that we have a pure L2 spine: SVIs are defined on leaf
nodes and routing is among the leaves only. We do pair leaf nodes via vPC+.
There is no CE or vPC(+) on the spine nodes. All VLANs, ports or
port-channels on the spine nodes are put in fabricPath mode. Any thoughts?

-- Sent from mobile.

On Sat, Jul 19, 2014 at 1:20 PM, Murphy, William <William.Murphy_at_uth.tmc.edu
> wrote:

> Perhaps a dumb question, but is it a pure L2 spine? If you are doing
> routing on the 7.7K's then they will learn a bunch of MAC's... Also, if
> you have VPC or links doing CE then those links will learn MAC's as well...
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Yuansen Chen
> Sent: Saturday, July 19, 2014 10:51 AM
> To: ccielab_at_groupstudy.com
> Subject: Fabricpath spine learns tons of MAC, why?
>
> This may be off topic. Just see anybody can shed some light on it.
>
> We have 2 Nexus 7706 (running V6.2.8) at the core. The devices are the
> spine of our fabricpath topology. A bunch of other Nexus 7706 leaves
> connect to the core using fabricpath mode. Theoretically, the spine should
> not see individual MAC addresses. Unfortunately, the spine sees almost the
> same number of MACs as seen on the fabricpath leaves. The
> destinations/paths are correct. They use switch IDs, not CE or trunk ports.
> It seems for some unknown reason, the spine strips off the fabricpath
> header and look into the Ethernet header. I double check the ports of the
> spine: one management port in routed mode, all connected up/up ports are
> in fabricmode, and some notConnected ports are in trunk mode (does this
> matter?). Did I miss anything here?
>
> PS: Did anybody successfully bring a 100G link (N77-F312CK-26) up between
> two Nexus 7706 boxes running v6.2.8a? We have to downgrade to v6.2.8 to get
> the speed.
>
> Thanks,
>
> --
> Yuansen Chen
> CCIE #20383
>
>
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Received on Sat Jul 19 2014 - 16:56:28 ART