Re: OT : To Connect IBM BladeCentre Swiches with Nexus 2k

Brian,

Thanks for your inputs!

Can you please let me know what is north/south traffic etc stands for ., ?
why does it creates a problem when traffic goes East to west?
Also please go through the attached diagram which shows the exact
connectivity how all devices connected.

1) N2k's are connected with N5k on a VPC
2) 6500's are connected with N5k on a VPC

3) All Four blade switch connected with two cables each to N2k as
ether-channel access port.

Currently the setup is in implementation stage and throughput is as follows

N2k 1 or N2k 2 to N5k is 40Gbps throughput

6500- 1 or 6500- 2 to N5k is 40Gbps throughput

Blade-switch 2*1 gig eth-channel to N2k is 2Gbps throughput

~ Akber.

On Wed, Dec 19, 2012 at 7:35 PM, Brian McGahan <bmcgahan_at_ine.com> wrote:

> It's not really a consequence of spanning-tree that's an issue because
> like you said they're just access ports. Be aware though that the 2K's do
> not support STP on their downstream facing links, as these links always run
> as edge ports with BPDU filter enabled. The real potential design issue is
> that the Nexus 2k doesn't support local switching. If most or all of your
> traffic is north/south then this is fine, but if you're trying to go
> east/west between the blade switches then all your traffic has to go north
> on the uplinks to the parent Nexus 5K switch, and then south back down to
> the 2K. Also depending on how many uplinks you have on your 2K's going to
> the 5K's, you're potentially going to be oversubscribing these links beyond
> what you want.
>
> Ideally you would probably skip the 2K's and go direct to the 5K's, e.g.
> 5020 or 5596 if you need more port density, but of course the disadvantage
> of this is the cost.
>
>
> HTH,
>
> Brian McGahan, CCIE #8593 (R&S/SP/Security)
> bmcgahan_at_INE.com
>
> Internetwork Expert, Inc.
> http://www.INE.com
>
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Akber Ali Mirza
> Sent: Wednesday, December 19, 2012 3:08 AM
> To: CCIE Lab
> Subject: OT : To Connect IBM BladeCentre Swiches with Nexus 2k module
>
> Hello All,
>
>
>
> We are looking forward to implement IBM BladeCentre Swiches connectivity
> with Nexus 2k module.
>
>
>
> I would like to brief you about my network over as follows:
>
>
>
> Coreswitch : 6513 ( Layer 3 switch + Spanning Tree root)
>
>
>
> Nexus 5010 : Layer 2 switch
>
>
>
> Nexus 2k 10G ports based module.
>
>
>
> *Currentl Solution : *we want to connect the IBM Blade Switches (4) as
> demonstrated in the attached diagram which will be connected
>
> to Nexus 2k module as Ether-channel Access port.
>
>
>
> Initially we been proposed by our vendor with this design and Now vendor
> is recommending us to connect the Blade switch etiher to
>
>
>
> Nexus 5k switch or directly to 6513 core-switches instead of Nexus 2k
> modules as they say Nexus 2k modules are only to connect
>
>
>
> the Edge devices .
>
>
>
> We do not have ports available on Nexus 5010 to connect the cables from
> IBM Blade Centre Switches.
>
>
>
> Otherthan that, incase if we go ahead and connect the IBM Blade switches
> as access ether-channel access port with Nexus 2k module
>
> what are the consequences we have to face realted Spanning tree or any
> other.
>
>
>
>
>
> Request you to please give your valuable comments at the earliest!
>
>
>
>
>
>
>
> ~ Akber Mirza.
>
>
> Blogs and organic groups at http://www.ccie.net
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Received on Wed Dec 19 2012 - 20:27:03 ART