[c-nsp] Handling redundancy between buildings.

[Kevin Seich]

Thank Scott, I will take a look at that.  32 might just be enough for what
we want to accomplish.

On Mon, Apr 30, 2012 at 3:31 PM, Scott Voll <svoll.voip at gmail.com> wrote:

> run your 3750's in a HSRP setup.  weight the one in the building to be
> primary for the vlan's in that building and do the oppisite in the other
> building.
>
> we do it here and it works pretty slick.
>
> Not knowing the size of your buildings.... it is possible to run out of
> HSRP instances.  I think we topped our 3750E off at 32.
>
> Not sure what your looking at for total vlans.
>
> YMMV
>
> Scott
>
> On Mon, Apr 30, 2012 at 12:08 PM, Kevin Seich <kseich at gmail.com> wrote:
>
>> We have 2 buildings on our Campus right next to each other.  They are
>> connected by 10 Gb fiber pulls.  Each building has it's own generator and
>> UPS.  Each building has it's own ISP.  We have an ASA 5520 failover pair,
>> one in each building.  We have 2 - 3750x stacked in each building as a
>> core.  We are currently a flat network, a /16.  We are in the
>> design/brainstorming phase of segmenting this into vlans.  We'd like to
>> take the burden off the ASA for routing and do all inter vlan routing on
>> the 3750s.  From what we can see, you cannot treat the 3750s as a failover
>> pair, like the ASAs.  What are our options in segmenting this?
>>
>> 1  We can do all routing on the ASAs.  This would achieve the same
>> redundancy we have now, but put the burden on the ASA for routing all
>> vlans.
>>
>> 2  Put the routing on the 3750 stack.  This would essentially break our 2
>> buildings into separate networks, separate , non-overlapping vlans in each
>> building.  reconfigure services to talk across the buildings and vlans.
>>
>> 3  put in routers behind the ASAs that handle all the vlan routing.  These
>> function in a failover pair.  this keeps the redundancy we are looking for
>> but we are not utilizing the layer 3 capability that we paid for on the
>> 3750s.
>>
>> Are there other options?  What have you guys/girls done?
>>
>> Looking for any other input you have just to spark the design creativity.
>>
>> Thank you !
>> Kevin
>> _______________________________________________
>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>
>
>