Hi,
Typically, the workstations default gateway will be
the router interface for the subnet they are on. It
can be another IP beyond a router/routing switch, etc
but if the route between them and this gateway is lost
then they are stuck. It is suggested to do it the
first way which is easy and logical. There are other
protocols such as IRDP that allow workstations to
learn the default gateway from the network, but this
isn't supported on most devices that I know of. Cisco
supports it.
As for using the switch as a core router, it really
depends. How many routes are in the network, etc. What
type of 3Com is this and what code rev, memory,
hardware/modules, hardware revisions? From my
experiences with routing switches (many vendors) they
work but are not as reliable as true routers yet. They
can do real interesting things at times.
I'm not going to debate OSPF vs EIGRP here, but EIGRP
is Cisco-propiertary and OSPF is a open standard that
almost every major vendor has support for.
You also mentioned you have secondary address's on
some devices (multinetting). You need to be careful
here when routing because most routing protocols use
the primary (or first) IP address on the interface to
source the route update from.
Erick
--- Bob & Karen Timmons <[EMAIL PROTECTED]> wrote:
> Greetings,
>
> We're having a discussion at work on the merits of
> moving the default gateway from our router to our
> switch. In a nutshell, we have multiple IP subnets
> and 2 routers with secondary addresses. I
> understand that the 'Cisco way' is to readdress so
> as to not have multiple IP subnets, however I'm not
> here to debate that. We'd like to move the gateway
> address to our core switch and let it do any routing
> (Our switch (3com) is a layer 3 switch that's
> capable of RIP & OSPF). I'm told, though, that it
> cannot be done. I don't have any spare layer 3
> switches with which to 'play' with. To me, it makes
> sense to have a switch do the routing because
> they're considerably more robust than the routers
> that we currently have.
>
> We're replacing our 3com routers with 2 Cisco 7206's
> next quarter and will be installing a pair of 6500's
> next year. We're moving from OSPF to EIGRP only.
> What we'd like is for the switches to route,
> assuming that they're EIGRP capable. I guess we'd
> need a route-processor.
>
> I guess my question is, can this be done? Is this a
> common practice in the real world? I'm anxious to
> hear from you all.
>
> Bob
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