RE: IRDP in CCIE Lab & Real world use

From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Mon Jul 31 2006 - 21:57:47 ART


Hi Mathew,

To Test this

Try to configure something like
        =R1=
Lo-R6 = =R3
        =R2=

If the diagram came mess up, r1,r2,r3 are in the same vlan, r1, r2, r6 are
in other vlan.

At R1 enable irdp, also at R2 enable irdp.

Set the higher preference for the router you what to set as default Gateway
Enable any IGP between R6 and R1 and R2, Redistriburte the R1,R2 Connected
interfaces, so R6 could reach that network
At R3 point a static Route to the fas0/0 to proxy-arp for any destination

To test this
Sh down the inte sitting with R3
Clear arp at R3
And try again

This is what I saw labbing this today, with your requirement. I think that
it could be a combination of Proxy-Arp at the router acting as
default-gateway. I have not test the preferences of outgoing, so please
excuse me if I'm wrong.

Saludos,
Victor.-

-----Mensaje original-----
De: nobody@groupstudy.com [mailto:nobody@groupstudy.com] En nombre de Mathew
Fernando
Enviado el: Lunes, 31 de Julio de 2006 07:31 p.m.
Para: ccielab@groupstudy.com
Asunto: IRDP in CCIE Lab & Real world use

Hi Group,

When we configure a CISCO router to announce itself as a Default
gateway via IRDP, I think all we need is to configure "ip irdp"
(minimum) under the LAN interface. Here I believe router acts as a
server.

1. Is the IRDP client/server architecture?

2. Is this a dynamic way to tell the clients compared to static ways
like HSRP/VVRP?

2. How do the Clients (Windows, Linux etc) learn this gateway?

Thanks

Mathew



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