Nexus Experiences,

Hello all

We're planing a nexus deployment late this year, early next. This would be replacing our current 3 data center 6500 based core.

I'd be very interested any experiences, good and bad you may have had as you migrated from a Cat6K or Cat45/4900 based datacenter environment.

We currently have approx 800 servers over 4x 6509s at the server access layer and a dual 6509 core. All with redundant sup720-10GE.

Stage 1 is slowly replace the server access layer with N5K/N2K Stage 2 is to replace the 6509 core with NX7K

TIA Wes

Reply to
wes
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I know this is rather late but what the hell!

No real gotchas with the 5Ks, but rememner management is OOB.

If you want to run vPC, you will need a pair og 10G links joining the pair of

5Ks.

With the 7Ks, the biggest things to watch for are make sure they support any specific features you need - they are very much stripped down packet forwarding machines. If you need things like SLB, WCCP etc you may need to look closely at your options.

The second is the way they eat ports, particularly on the 32 port cards.

  1. There is no internal link between VDCs for traffic.
  2. There are two modes to run the interfaces in, shared and dedicated.

These two points can really eat cards.

If you are running two VDCs, and you want two links to join the VDCs as well, that is four interfaces per 7K already. If you want to make sure you have the full 10G you need to run the interfaces in dedicated mode. That can be set per group of four, but it does mean that if you want two dedicated 10G links between switches, you are using half a 32-port card already.

If you want to run vPC on the 7Ks, you need a pair of 10G links joining the VDCs, These are dedicated vPC port links and are in addition to any links you need to join vPCs for ser traffic. You have two VDCs want two links to join them and you want to run vPC on the, that is a 32 port line card fully used.

Paul,

Reply to
Paul Matthews

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