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Problem with multiple routers in 1 subnet?

I'm going to be introducing a layer 3 switch (Cat 3550-12G) into a

subnet that already has a router interface. This new switch is to

serve as the core switch for the new LAN for this office.

The existing router is a Nortel model, and serves as the router

between subnets of the new LAN (, and, the

old LAN (, and the rest of the company via WAN


The new switch will have SVI's of: for client PCs for servers

The existing router has an interface of:

The existing router will physically connect to a port on another cisco

switch, that is part of the VLAN.

My questions:

1. does the existence of multiple routers in my subnet

present any problems? I plan to have my clients point to

the switch's SVI of as their default gateway, as I want

traffic destined for the 10.40 and 10.41 subnets NOT to touch the

existing router, but rather my new L3 switch.

2. does the existence of multiple routers in the same subnet create

problems with RIPv1?

My current guesses:

1. 10.40 clients with a default gateway of (switch SVI),

will send their traffic to the switch, and the switch will forward

traffic destined for the rest of company to the existing router

interface of as necessary.

2. dunno


Re: Problem with multiple routers in 1 subnet?

The clients will forward to whatever gateway you point them to, so having multiple paths on the same subnet

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