[AusNOG] Running out of VLANs

[James Mcintosh]

Hi Reuben,

Yes you are correct we're using 3750's. One of the main reasons we went for these is because they're stackable and we need many more ports than are available on ME3600/ME3800's. It makes life much easier to have a single logic switch rather than a heap of them connected via uplinks.

Are you suggesting plugging in carrier links directly into routers? If so that's not feasible for us as we have more carrier links than router interfaces.


-James



On Monday, 16 December 2013 2:25 PM, Reuben Farrelly <reuben-ausnog at reub.net> wrote:
 
On 16/12/2013 2:20 PM, James Mcintosh wrote:
> Hi Noggers,
>
> What are people doing about hitting switch VLAN limits? We terminate a
> lot of Ethernet services from several carriers. Our Cisco switch gear is
> great but limited to 128 spanning tree VLAN sessions and 1,000 VLANs.

Which switch platform/models are you using?

By the sounds of it, you're probably using 3560/3750's...which if this 
is the case is probably not a good idea (they're floor access switches, 
not designed for what you're doing and to be honest, not suited to this 
either).

The answer is to either migrate to trunked subinterfaces on a router, OR 
(and this is what I would recommend as the best choice), migrate to the 
Cisco ME3600/ME3800 platform which scales to this degree, easily, and 
gives you lots of nice functionality (such as per-port vlan 
significance) that you probably don't have right now.

Reuben



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