From: Peter (peter@cyscoexpert.com)
Date: Wed Oct 01 2003 - 13:11:27 GMT-3
Gary,
Assuming you have Layer 3 on at least one Cat3550 then you can segment your
network in this way.
Connection to the router can be another subnet.
You will end up having "interface vlan"s on 3550 that will route between the
vlans and hosts will point to the IP addresses on those vlan interfaces as
default gateways to get outside the subnet. On the router you will need a
route pointing to your internal vlans to the 3550.
_____________________________
Peter
#7247 (R&S, Security, SP)
CyscoExpert Corp.
4433 W. Touhy Ave. Suite 410
Lincolnwood, IL 60712
Phone (847) 674-3392
Toll Free (866) CyscoXP (297-2697)
Fax (847) 674-2625
----- Original Message -----
From: "Gary Bartlett" <ciscokid@sympatico.ca>
To: <ccielab@groupstudy.com>
Sent: Wednesday, October 01, 2003 8:58 AM
Subject: vlan planning
> hi Group,
>
>
>
> I have a client that has 3 switches configured as a flat network (all
> ports are in vlan1), all devices are web servers & they have 5 class C
> address spaces, 2 of the switches are 3550's and 1 is a 1900. They would
> like to better organize there network layout & think that each server
> should be put into there own VLAN... I'm well versed in routing, but I
> think I'm missing something when it comes to switching... To my
> understanding, if layer 3 switching is enabled on the cat 3550s, the
> layer 3 switches should be able to resolve the routing locally, & not
> have to forward the packets to the router to route between VLANS.
>
>
>
> The cat1900 is connected to one of the 3550s, so if each port is put
> into its own vlan, it would forward the request to the 3550 (will the
> 3550 tell the 1900 to route between VLANS?)
>
>
>
> I'm also not sure if this is a very good design? The client wants to
> decrease the impact of broadcast storms because of a virus they got a
> while ago.
>
>
>
> So I would have to configure a trunk between the 3 switches (No problem)
> but another question lies on how traffic will be forwarded to the router
> out to the internet... The router is a 2501 with an Ethernet interface
> connecting to one of the switches, I'm not sure how a server connected
> to one of the switches would forward its traffic to the router in
> another vlan, is that done with a default route?
>
>
>
> & if so, what about if the router is connected to switchA, and a server
> on switchB needed to get to the router, I don't know how this would
> work, would a default route be needed on this switch as well?
>
>
>
> any help would be appreciated
>
>
>
> Thanks
>
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This archive was generated by hypermail 2.1.4 : Mon Nov 24 2003 - 07:52:54 GMT-3