From: kyle prevey (preveyk@xxxxxxxxxxx)
Date: Tue Nov 13 2001 - 01:53:19 GMT-3
Exactly...just wanted to verfiy it with a guru. Thanks.
Kyle
From: Jerry Toomey <jetoomey@yahoo.com>
Reply-To: jtoomey@wansend.com
To: kyle prevey <preveyk@hotmail.com>
CC: ccielab@groupstudy.com
Subject: Re: IRB Help...need a guru
Date: Mon, 12 Nov 2001 16:11:53 -0800 (PST)
Kyle,
I don't understand your follow-up question. If the switch only has one IP
address, then it won't "route" anything. It will send re-directs to where
the static routes are in the same bridge-group.
When you use a layer-3 bridge and a router, you have to ask yourself the
question, "which box do I want doing the routing between the VLANs?"
If it is the router, then you don't need BVIs at all.
If it is the switch, then you need multiple BVIs, each with an IP.
The only reason for setting up a single BVI with an IP is to telnet to the
switch and manage it.
Jerry
--- kyle prevey <preveyk@hotmail.com> wrote:
> Let me ask you one more if you don't mind.
>
> I have all ports set to bridge with different bridge groups...I have
> only
> one BVI with IP for one bridge group only not the others. I have four
> static routes to get to the other Vlans, Plus a default. SO you are
> saying
> that traffic from a pc coming in a bridge interface (no ip on interface)
> the
> pc is in the BVIs Vlan so it will go to the BVI and then the BVI will
> see
> the static routes and send the traffic out another bridged interface
> where
> the router is so it can get to the other Vlans. Other vlans
> (bridge-groups)
> don't have BVI. This is router on stick scenario with an L3 switch so I
> can
> have ACLs
>
>
>
> From: Jerry Toomey <jetoomey@yahoo.com>
> Reply-To: jtoomey@wansend.com
> To: kyle prevey <preveyk@hotmail.com>, ccielab@groupstudy.com
> Subject: Re: IRB Help...need a guru
> Date: Mon, 12 Nov 2001 15:24:38 -0800 (PST)
>
> Kyle,
> It will bridge to all the ports that have the same "bridge-group" on it.
>
> The BVI is useless if you don't put an IP on it. If you do put an IP on
> it, it will route to any attached networks (other BVI bridge-groups).
> If
> you add a default-route (ip route 0.0.0.0 0.0.0.0 router-ip) then the
> switch will be a mean, clean, layer-3 machine.
>
> Jerry
>
> --- kyle prevey <preveyk@hotmail.com> wrote:
> > It is a layer 3 switch, every interface is set to bridge, there are
> no
> > ip
> > addresses on any of the interfaces, there is one BVI10 interface and
> > there
> > are multiple bridge groups, 10, 20, and 30 and a router is hanging
> off
> > one
> > of the ports (trunk) for inter-vlan routing.
> > If a PC attached to one of the interfaces has its default-gateway
> set
> > to
> > the BVI10, what will happen? Will the BVI do anything with the data
> > since
> > all interfaces are set to bridge and there are no ip addresses on
> any?
> > Will
> > it possibly bridge it out all ports and it eventually will get to the
> > router
> > for Inter-Vlan routing? I have one PC with its default-gateway as the
> > BVI
> > and the data does get to the other Vlans. Some latency though.
> >
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