From: Steve McNutt (lpd@xxxxxxxxxxxxxxxx)
Date: Sat Nov 04 2000 - 02:20:47 GMT-3
Tony's sample config does not work on a serial link though. I bring it up
not because I want to confuse the issue or be a mr. smartypants, but because
I think it's proabaly a good idea to understand that/how bridging behaves
differently on serial links.
To get bridging to work on a serial links, and still be able to use the same
test points on r1 and r2, both sides of the link will have to be put into a
bridge group and IRB will have to be used. Don't forget to add a bridge 1
route IP command on R2.
Lo0-[R1]-s0-------s0-[R2]-BVI1
2.2.2.2 1.1.1.1 1.1.1.2
-steve
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Tony Olzak
Sent: Friday, November 03, 2000 9:11 PM
To: Chuck Larrieu; Erick B.; Ccielab
Subject: Re: confusion on bridging
Chuck,
The command "ip routing" is on by default and hidden from the configuration.
Take two routers and configure them with just ip addresses. Then place a
loopback on R1. Place a default static route on R2 and ping the loopback on
R1. You will be able to ping successfully even though there are no routing
protocols running on R1.
Configs:
R1
interface loopback 0
ip address 2.2.2.2
!
interface ethernet 0
ip address 1.1.1.1 255.0.0.0
R2
interface ethernet 0
ip address 1.1.1.2 255.0.0.0
You actually need to turn off IP routing in global config or in a bridge
command (IRB, etc.).
----- Original Message -----
From: "Chuck Larrieu" <chuck@cl.cncdsl.com>
To: "Erick B." <erickbe@yahoo.com>; "Ccielab" <ccielab@groupstudy.com>
Sent: Friday, November 03, 2000 6:15 PM
Subject: RE: confusion on bridging
> How will it route ip if there are no static routes defined, or no routing
> protocol enabled, with networks placed into that routing process?
>
> I believe the show ip route will yield a "routing table" consisting of
> connected interfaces. Traffic will not "route" between devices. I.e
> forwarding will not take place.
>
> Am I wrong again?
>
> Chuck
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Erick B.
> Sent: Friday, November 03, 2000 2:49 PM
> To: David T. Absalom
> Cc: Ccielab
> Subject: Re: confusion on bridging
>
> Yes.
>
> It'll route IP and bridge everything else if you have
> a IP address assigned to the interface and don't have
> 'no ip routing' globally.
>
> --- "David T. Absalom" <dabsalom@lucent.com> wrote:
> > I'm confused (nothing new...)
> >
> > If an interface is in a bridge group but has an ip
> > address and the "no ip
> > routing" statement has NOT been issued
> > (additionally, no crb or irb), will
> > it route or bridge. Is ip routing on by default
> > when an ip address is added
> > to an interface?
>
>
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