RE: IRDP in CCIE Lab & Real world use

From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Tue Aug 01 2006 - 10:14:30 ART

Did you receive my email Fernando?

-----Mensaje original-----
De: Victor Cappuccio [mailto:cvictor@protokolgroup.com]
Enviado el: Lunes, 31 de Julio de 2006 10:00 p.m.
Para: 'Mathew Fernando'; 'ccielab@groupstudy.com'
Asunto: RE: IRDP in CCIE Lab & Real world use

Upppsss I'm very sorry for my previous BIG post mistake, the thing was
because proxy-arp was enabled in the routers.

But here is how you configure IRDP on a Cisco Router/Switch.

R3(config)#ip gdp irdp
%Cannot start GDP client; system is routing IP
R3(config)#no ip routing
R3(config)#
R3(config)#ip gdp irdp
R3(config)#
R3(config)#
R3(config)#^Z
R3#
R3#show ip ro
00:41:54: %SYS-5-CONFIG_I: Configured from console by console
R3#show ip route
Gateway Using Interval Priority Interface
150.100.1.1 IRDP 6 100000 Vlan24
150.100.1.2 IRDP 6 1000 Vlan24
                                                                       
Default gateway is 150.100.1.2
                                                                       
Host Gateway Last Use Total Uses Interface
ICMP redirect cache is empty
R3#
00:41:56: ICMP: rdp advert rcvd type 9, code 0, from 150.100.1.4
R3#
00:41:57: ICMP: rdp advert rcvd type 9, code 0, from 150.100.1.2
R3#u all
All possible debugging has been turned off
R3#
00:41:59: ICMP: rdp advert rcvd type 9, code 0, from 150.100.1.4
R3#

Please apologize for the SPAM
Thanks
Victor.-

-----Mensaje original-----
De: Victor Cappuccio [mailto:cvictor@protokolgroup.com]
Enviado el: Lunes, 31 de Julio de 2006 08:58 p.m.
Para: 'Mathew Fernando'; 'ccielab@groupstudy.com'
Asunto: RE: IRDP in CCIE Lab & Real world use

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: Martes, 01 de Agosto de 2006 04:21 a.m.
Para: Ivan
CC: ccielab@groupstudy.com
Asunto: Re: IRDP in CCIE Lab & Real world use

Hi Group,

Thanks you for the quick replies.

As I understand "ip gdp irdp" is used to make the CISCO router as a
Client when IP routung is disabled.

Whereas, "ip irdp" announce the router as a Gateway to clients. The
options under this command help us to specify the preference, timers
etc and only this command is sufficient.

Can you all pls confirm that my understanding is correct above?

I am trying to lab this up soon.

mathew

On 8/1/06, Ivan <ivan@iip.net> wrote:
> 3) When enable ip irdp on LAN interface router will send ICMP-broadcast to
the
> LAN advertising myself or proxy addres. Windows-host has built in client.
To
> compatible SunOS need to use "multicast" keyword. This force send
advertiment
> to 224.0.0.1 instead broadcast.
>
> 2) Parameter priority used to define prefer gateway if receved number
> IRDP-advertisment.
>
> > 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
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
> --
> Ivan
> 

-- 
Thanks

Mathew

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