From: ccie2be (ccie2be@nyc.rr.com)
Date: Tue Jun 22 2004 - 13:22:49 GMT-3
I don't think so. Before R5 can do proxy arp, the Cat must send a ping
reply packet. With ip routing enabled on the Cat, how will the Cat know
which interface to send the packet out assuming it didn't drop the packet
when it couldn't find a matching route for the destination address in it's
route table?
----- Original Message -----
From: "Shane Marquis" <Shane.Marquis@busint.com.au>
To: <ccielab@groupstudy.com>
Sent: Tuesday, June 22, 2004 12:09 PM
Subject: RE: Routing without routing protocol
> Maby I don't understand the question - Im tired and havent read the whole
> thing, but cant this be done by enableing proxy arp on R5? And using the
> static your allowed on r5 to point at the 3550's lo?
> Shane
>
>
>
>
> > -----Original Message-----
> > From: ccie2be [mailto:ccie2be@nyc.rr.com]
> > Sent: Wednesday, 23 June 2004 2:00 AM
> > To: MMoniz; Group Study
> > Subject: Re: Routing without routing protocol
> >
> > OK, Mike. Maybe you're on to something, but...
> >
> > there's only basically one command, ip irdp.
> >
> > Using that one command, how do I make R5 generate irdp
> > messages as opposed to just listening for those messages.
> > And, likewise with the 3550, how do I make the 3550 listen
> > for irdp instead of sending them?
> >
> > Thanks, Tim
> > ----- Original Message -----
> > From: "MMoniz" <ccie2002@tampabay.rr.com>
> > To: "ccie2be" <ccie2be@nyc.rr.com>; "Group Study"
> > <ccielab@groupstudy.com>
> > Sent: Tuesday, June 22, 2004 11:32 AM
> > Subject: RE: Routing without routing protocol
> >
> >
> > > Actually you would need to enable IRDP on R5 so it will produce IRDP
> > > messages. The Cat will listen to these
> > > as it will be the client.
> > >
> > > IRDP has the capability to "intercept" rip and igrp
> > messages but this is
> > not
> > > a requirement.
> > >
> > > IRDP actually uses ICMP for messaging as the name implies.
> > Here is a link
> > > for it.
> > >
> > >
> > http://www.cisco.com/univercd/cc/td/doc/product/software/ios12
> > 2/122cgcr/fipr
> > > _c/ipcprt1/1cfipadr.htm#1001945
> > >
> > > Mike
> > >
> > > -----Original Message-----
> > > From: ccie2be [mailto:ccie2be@nyc.rr.com]
> > > Sent: Tuesday, June 22, 2004 11:17 AM
> > > To: MMoniz; Group Study
> > > Subject: Re: Routing without routing protocol
> > >
> > >
> > > Hey Mike,
> > >
> > > Option isn't allowed - the instructions explicitly told me
> > to enable ip
> > > routing on the 3550.
> > >
> > > Re: irdp. I thought of that this morning but I thought if
> > irdp were used,
> > it
> > > would have to be on the 3550. However, since there's no
> > routing protocol
> > > running on the link between the 3550 and R5, there wouldn't
> > be any routing
> > > updates to listen for.
> > >
> > > Also, if I remember correctly, irdp only listens for rip or
> > igrp updates
> > and
> > > only ospf is running on R5.
> > >
> > > I think there's still something else I'm missing.
> > >
> > > Thanks, I'm sure I'll find out, Tim
> > >
> > > ----- Original Message -----
> > > From: "MMoniz" <ccie2002@tampabay.rr.com>
> > > To: "ccie2be" <ccie2be@nyc.rr.com>; "Group Study"
> > <ccielab@groupstudy.com>
> > > Sent: Tuesday, June 22, 2004 10:28 AM
> > > Subject: RE: Routing without routing protocol
> > >
> > >
> > > > Well I would say you have basically 2 options here.
> > > >
> > > > 1. Use IRDP on R5
> > > >
> > > > 2. Disable IP routing on the Cat and configure a
> > default-gateway. This
> > is
> > > > not a static route or a static network!!
> > > >
> > > > Mike
> > > >
> > > > -----Original Message-----
> > > > From: nobody@groupstudy.com
> > [mailto:nobody@groupstudy.com]On Behalf Of
> > > > ccie2be
> > > > Sent: Tuesday, June 22, 2004 10:10 AM
> > > > To: Group Study
> > > > Subject: Routing without routing protocol
> > > >
> > > >
> > > > Hi All,
> > > >
> > > > This one got me.
> > > >
> > > > 3550 has routing enabled but no routing protocols enabled.
> > > >
> > > > It's only path to the rest of the network is via R5. All
> > other routers
> > on
> > > > the
> > > > other side of R5 must be able to ping the 3550's loopback.
> > > >
> > > > I'm allowed to use one static route on R5.
> > > >
> > > > This is what it looks like:
> > > >
> > > > 3550 lo0 fa0/5 ------- e0/1 R5 ----- rest of network
> > > >
> > > > How do I provide reachabiltiy to the 3550's lo0 without
> > violating lab
> > > rules
> > > > ie
> > > > no default routes or default networks and
> > > > no static routes except the one explicitly allowed here?
> > > >
> > > > Please tell me what I'm missing. Thanks, Tim
> > > >
> > > >
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