RE: Design issues: Inter-connecting Nexus 5000 switches

> -----Original Message-----
> Sent: Wednesday, May 19, 2010 11:20 PM
> To: mish de souza
> Cc: Cisco certification
> Subject: Re: Design issues: Inter-connecting Nexus 5000 switches
>
> Mish,
> to my knowledge there is no need to interconnect access switches to benefit
> from vPC. Please check out this document "Data Center DesignIP Network
> Infrastructure" to validate your design. Though it says "IP network
> infrastructure", it covers L2 topologies as well, and fairly good explained.
>
> You can also check a series of chapters starting from this
>
> http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9670/C07-
> 572831-
> 00_Dsgn_Nexus_vPC_DG.pdf
>

I second the design guides here. Great stuff for getting started with vPC. We have done some testing and as long as you follow the recommendations in the guide, it's hard to create any major issues. There is dual 10G link for the peer traffic and then another OOB link for peer-keepalive, that basic design is pretty resilient. The peer-keepalive is only needed when the vPC is first formed, but can go down after that, you just won't be able to create more vPC port channels or survive a reboot. Even if both fail, you only end up with duplicate frames.

As Kambiz also mentioned, how are you connecting them to your network.

-ryan

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Received on Thu May 20 2010 - 12:26:48 ART