[c-nsp] Design Q

[Gert Doering]

Hi,

On Wed, Apr 13, 2005 at 03:14:36PM -0500, info at beprojects.com wrote:
> The question is, what do I do if I want to create 4-5 VLAN's.  Say I 
> have a layer3 switch like a 3750.  My initial thought would be to make 
> it the DG for each vlan and it would have a default route of .1. 
> However every time it gets a redirect, it will add it to it's routing 
> table, right?  

Routers don't listen to ICMP redirects.  That's for hosts.

(Also, a 3750 would choke if you try to feed it a full routing table
via ICMP redirects...)

> Now if one of the machines on one of the vlan's is a dns 
> server or web server, theoretically, there could be thousands on 
> different destinations, in which case the L3 switch will have thousands 
> of routing entries and we all know that a lower end switch like the 3750 
> does not have enough memory to hold 100,000 routes.

Exactly.

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de