[c-nsp] Switch recommendation

[Vincent De Keyzer]

Well, OK, I see your point - and I got the same question off-list too, so
here is the situation: 

This is for a (pre-)Wimax service. We need to cover the whole city with 100
base stations, with up to 200 users per BS - that's what gives the 20,000
figure.

The L2 domain has to spread over the whole city, because a user might roam
across BSs, and he should be able to continue working without renewing his
IP address (we made a test on a tramway recently, and it worked fine over a
journey of several kilometers). 

But indeed we will slice this into several flat L2 networks, just to limit
the size of the broadcast domain.

Still, the switches close to the default gateways will need to know all
these MAC addresses (even if in separate VLANs).

Vincent


> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of Tim Durack
> Sent: mercredi 9 novembre 2005 17:15
> To: Vincent De Keyzer
> Cc: cisco-nsp at puck.nether.net; Church, Chuck
> Subject: Re: [c-nsp] Switch recommendation
> 
> I think what Chuck is trying to say is: How big is your L2 broadcast
> domain!!??
> 
> I know we had severe pain when we were running large, flat L2 domains
> in the 1000+ MAC range. I shudder to think what 10,000+ would be like.
> 
> But maybe your environment is much more controlled...
> 
> Tim:>
> 
> On 11/9/05, Vincent De Keyzer <vincent at dekeyzer.net> wrote:
> > A handful. Today 2, tomorrow maybe 10?
> >
> > Vincent
> >
> > > How many VLANs?   (Please don't say '1')...
> > >
> > >
> > > Chuck Church
> > > Lead Design Engineer
> > >
> > > -----Original Message-----
> > > From: cisco-nsp-bounces at puck.nether.net
> > > [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Vincent De
> > > Keyzer
> > > Sent: Wednesday, November 09, 2005 7:19 AM
> > > To: cisco-nsp at puck.nether.net
> > > Subject: [c-nsp] Switch recommendation
> > >
> > > Hello,
> > >
> > >
> > >
> > > I have the following requirements for a switch :
> > >
> > > *     ability to handle over 20,000 MAC addresses
> > > *     a few GigE ports (1 now, maybe 4 later)
> > > *     a few FE ports (6 now, maybe 12 or 16 later)
> > > *     no layer 3 required
> > >
> > >
> > >
> > > I have the feeling that those requirements are somewhat unusual - a
> few
> > > ports vs. a large number of MAC addresses.
> > >
> > >
> > >
> > > Is the 4503 a good choice for those requirements? What cards should I
> > > stick
> > > in there?
> > >
> > >
> > >
> > > Is there anything cheaper that would do the job?
> > >
> > >
> > >
> > > Vincent
> > >
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