Re: 1 server with LCAP over 2 switches?

For that you need VSS, then you can create multi-chassis Port-Channel.

On Fri, Aug 28, 2009 at 12:11 PM, Smooth IE <smoothccie_at_googlemail.com>wrote:

> Hello Group,
>
> Just wondering if anyone has ever "spanned" a LCAP EC over 2 switches? I
> have a scenario where I have to CAT 6500's connected with a regular Port
> Channel, trunking of course and user VLANS are allowed over that trunk.
> What
> I want to do is create an LACP EC on 2 ports so that they can form an EC
> with a server that also supports LACP. So this parts easy:-
>
> On CAT-1, we use 2 ports on different blades for resilience.
>
> gig1/2
> switchport
> switchport mode access
> switchport access vlan 100
> channel-group 15 mode passive
> !
> gig4/2
> switchport
> switchport mode access
> switchport access vlan 100
> channel-group 15 mode passive
> !
>
> This should and does work fine with the server, who's type is irrelevant,
> it
> supports LACP and that's all that matters.
>
> The second part of this scenario is, the same server has 2 further
> interfaces, and to provide even more resilience, you need to patch them
> physically into CAT-2, same blade and port, just a different physical
> switch. Then, create the same EC with the same config above (as on CAT-1)
> on CAT-2. Will this work? Will the trunk between the CAT's pass that
> information over? Will this provide resilience in terms of loss of blade
> and
> then loss of entire switch. For some reason, I don't think this will work,
> as EC numbering is locally significant. As far as I know I don't think you
> can SPAN and EC over multiples switch. Any advice would be most welcome.
>
>
>
> SERVER
>
>
>
> Thanks.
> Smooth_IE
>
>
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Received on Fri Aug 28 2009 - 12:45:35 ART