From: Alan Simpkins (alan_simpkins@xxxxxxxxx)
Date: Tue Aug 01 2000 - 11:45:24 GMT-3
Pretty slick
--- Simon Baxter <Simon.Baxter@au.logical.com> wrote:
> Yeah, nice little protocol for stub networks
> attached to a hub router.
>
> remember, only configure router odr on the hub
> router...
>
> -----Original Message-----
> From: Scott F. Robohn [mailto:sfr@mentortech.com]
> Sent: Tuesday, August 01, 2000 11:18 AM
> To: Brian Edwards; ccielab@groupstudy.com
> Subject: Re: On-Demand Routing (ODR)
>
>
> Brian,
>
> One of my students passed this link on ODR to me
> last week:
>
> http://www.cisco.com/warp/public/105/39.html
>
> Scott
>
> Brian Edwards wrote:
> >
> > Anyone have any experience with this? It seems as
> though it uses CDP. What
> > is the advantage over RIP? Is this a 12.1 feature?
> Might be a nice tool to
> > use in the lab if they limit you from using other
> protocols.
> >
> > /Brian
> >
> > -----Original Message-----
> > From: Simon Baxter
> [mailto:Simon.Baxter@au.logical.com]
> > Sent: Monday, July 31, 2000 4:33 PM
> > To: Kevin Baumgartner; Mark Lewis
> > Cc: ccielab@groupstudy.com
> > Subject: RE: IRB (I thought I understood it
> until...!)
> >
> > I guess the idea is that traffic bridged from the
> r1/r7 lan is bridged
> over
> > the r1/r5 serial link and then selectively (with
> bridge 1 route ipx,
> brisge
> > 1 bridge ip etc) routed (or bridged) from the BVI
> on r5.
> >
> > I haven't built it, but it sounds straight forward
> enough??
> >
> > Simon
> >
> > -----Original Message-----
> > From: Kevin Baumgartner
> [mailto:kbaumgar@cisco.com]
> > Sent: Tuesday, August 01, 2000 3:54 AM
> > To: Mark Lewis
> > Cc: ccielab@groupstudy.com
> > Subject: Re: IRB (I thought I understood it
> until...!)
> >
> > At 04:44 PM 7/31/00 +0000, you wrote:
> >
> > >Hi people,
> > >
> > >This is a question about lab 8, so if you haven't
> done it yet, avert your
> > eyes now !
> > >
> > >
> > >
> > >On lab 8b, you have to configure bridging between
> the ethernet segment
> > connected to r1 & r7 and the serial connection
> between r1 & r5. So far so
> > good. However, then you are required to configure
> IRB on r5. Why? I was
> > under the (obviously mistaken) impression that
> with IRB you use it with
> > multiple interfaces in a bridge-group and it
> provides routing (ref. Cisco
> > LAN Switching (CiscoPress)). There's only one
> interface in the bridge
> group
> > on r5. Is this something to do with encapsulation
> ??!!
> >
> > IRB allows routing between and routed network
> and a bridged network.
> This
> > can be IP, IPX, Appletalk and I believe a few
> other protocols.
> > The key part about using IRB is that you need to
> create what is called a
> > "BVI" interface. This is similar to a physical
> interface and here you
> > configure either IP address, IPX, Appletalk for
> the bridged network. So in
> > lab 8b the IPX network that is defined on r7 has
> to be define also
> > on the BVI interface on r5. The great thing now is
> that you can route
> > between the bridged network and the rest of the
> IPX networks on the
> > ethernet side of r5.
> >
> > Just defining bridge-groups on r5 doesn't give
> you IRB. You need to
> > define the BVI interface and apply the network
> address to it.
> > The easiest way to thing of why you would use IRB
> is to see what happens
> if
> > you are just using bridge-groups. It's a competely
> flat network.
> > Basically one big network for everyone. This is
> not the really world.
> There
> > are going to be a number of subnetted networks
> already and you
> > need to somehow put your bridged network as part
> of this subnetted
> network.
> > This is how IRB comes into play.
> >
> > Kevin
> >
> >
>
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