RE: Migration to Nexus 5k best practices...

On Wed, Oct 10, 2012 at 00:09:13, 6PE_2.0 wrote:
> Subject: Migration to Nexus 5k best practices...
>
> Hi Mates,
>
> Over the next few weeks, i plan on migrating my dual stack 3750 in my
> data center to NX 5K which connects UCS, NetApp and a bunch of other
> physical server
>
> My primary research/resource so far has been mostly Cisco documentation.
>
> Out of curiosity, for those who have done similar migration, any tips
> on recommended best practices? The Cisco press books i have seen so
> far is been less technical, rather sales. Also blog links welcomed.
>

Assuming that this is a smaller install and that you'll be using the layer 3 card on the 5k's, you'll want to check out a few things about routing and HSRP with VPC's. If you think you'll run an IGP at some point, you should plan for extra links between your 5k's over those used as peer-links. The basic rule of thumb about VPC is that a packet received on a VPC member port needs to be forwarded back out a member port, it cannot use the VPC peer-link as its next hop to get to a member port unless a link in that particular VPC is down. That plays directly into single attached routing devices or devices that have formed an etherchannel to the VPC and are running a routing protocol.

http://bradhedlund.com/2010/12/16/routing-over-nexus-7000-vpc-peer-link-yes-and-no/

http://www.netcraftsmen.net/component/content/article/69-data-center/1215.html

Also, under the main VPC config, you should setup peer-gateway for your NetApp management as it will consult the MAC address of the packet received vs. its ARP table for replies. Peer-gateway allows the packet received with the other HSRP peer MAC to traverse. If you don't feel comfortable turning it on all VPC VLAN's, you can exclude ranges.

-ryan

Blogs and organic groups at http://www.ccie.net
Received on Wed Oct 10 2012 - 12:59:38 ART