From: Pete Yeargin \(pyeargin\) (pyeargin@cisco.com)
Date: Sun Jun 15 2003 - 17:35:49 GMT-3
I don't necessarily know that anyone has really answered this question
yet, Weidong. The "ip gdp irdp" command is used when you want a router
to act like a host running GDP (normally a workstation capability).
Once routing is disabled on a router with a "no ip routing" command, the
router has no gateway to which it can forward packets. By entering the
global config command "ip gdp irdp", you enable your router (which is
acting like a host) to process IRDP packets generated by advertising
candidate gateway routers. On the candidate router side, simply
enabling "ip irdp" causes the router to announce its candidacy. You can
tinker with preference commands under ip irdp to have one gateway
preferred over the second when running two redundant routers on one LAN
(in lieu of HSRP for example). Hope this helps. Like Brian said, just
get a couple of routers and play around with it.
Pete
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Brian Dennis
Sent: Friday, June 06, 2003 3:33 PM
To: 'Weidong Xiao'; 'John Matijevic'; ccielab@groupstudy.com
Subject: RE: ip gdp irdp?
Just get two routers and play around with it. On one router disable ip
routing and enable gdp for RIP. Then have the other router generate a
default route with RIPv1. After you see the route show up on the router
that doesn't have ip routing enabled, switch over to using IGRP. After
that you can try to play around with IRDP.
Router#sho run | in gdp
ip gdp rip
Router#sho ip rout
Gateway Using Interval Priority Interface
212.15.5.11 RIP 19 50 Ethernet0/0
Default gateway is 212.15.5.11
Host Gateway Last Use Total Uses Interface
ICMP redirect cache is empty
Router#
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Weidong Xiao
Sent: Friday, June 06, 2003 9:04 AM
To: John Matijevic; ccielab@groupstudy.com
Subject: RE: ip gdp irdp?
Thanks John, but there isn't much information in that link.
-----Original Message-----
From: John Matijevic [mailto:matijevi@bellsouth.net]
Sent: 06 June 2003 14:59
To: Weidong Xiao; ccielab@groupstudy.com
Subject: Re: ip gdp irdp?
Hello
GDP
The Gateway Discovery Protocol (GDP) allows hosts to dynamically detect
the arrival of new routers as well as determine when a router goes down.
http://www.cisco.com/en/US/tech/tk648/tk362/tech_protocols_list.html
Sincerely,
Matijevic
----- Original Message -----
From: "Weidong Xiao" <Weidong.Xiao@vi.net>
To: <ccielab@groupstudy.com>
Sent: Friday, June 06, 2003 6:45 AM
Subject: ip gdp irdp?
> Hello group,
>
> Can someone shed some light on the following command? I have tried CCO
search engine, Command References Master Index, Command Lookup tool, but
the only clue I got is that these commands not supported in layer 3
switching...
>
> Router(config)#ip gdp ?
> igrp Discover routers transmitting IGRP router updates
> irdp Discover routers transmitting IRDP router updates
> rip Discover routers transmitting RIP router updates
>
>
> Thanks in advance,
>
> Weidong
> CCNP, CCDP, CSS1
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