From: Malla, Girish (Girish.Malla@amd.com)
Date: Fri Mar 13 2009 - 12:13:59 ARST
Whenever we configure static route something like ip route x.x.x.x
x.x.x.x interface fa0/0 without any next-hop IP address, router's IOS
believe this network is directly connected to fa0/0 interface and if you
do "show ip route x.x.x.x" it will show it as directly connected network
to fa0/0. Similarly when you configured ip route 0.0.0.0 0.0.0.0 null0
(null0 is also like a virtual interface on the same route for loop
prevention), router treated it as a directly connected network to null0.
And you have already configured "network 0.0.0.0 under EIGRP process
means all directly connected interface's subnets will be advertised. So
EIGRP is advertising this default route to others.
Girish~
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Ram Shummoogum
Sent: Thursday, March 12, 2009 8:26 PM
To: nyrhh@hotmail.co.uk
Cc: ccielab@groupstudy.com
Subject: Re: EIGRP Default Route /w ip route 0.0.0.0/0 null0 + network
0.0.0.0????
Have a look at the EIGRP white paper from Cisso. very well written.
When you install a static route to an interface, and configure a network
statement using router eigrp, which includes the static route, EIGRP
redistributes this route as if it were a directly connected interface.
Ram
nayyar hakeem-habeeb <nyrhh@hotmail.co.uk>
Sent by: nobody@groupstudy.com
03/12/2009 07:40 PM
Please respond to
nayyar hakeem-habeeb <nyrhh@hotmail.co.uk>
To
"ccielab@groupstudy.com" <ccielab@groupstudy.com>
cc
Subject
EIGRP Default Route /w ip route 0.0.0.0/0 null0 + network 0.0.0.0????
Hi Experts,
why would EIGRP inject a 0.0.0.0/0 route with this configuration? I have
always been under the impression that the "network" statement (under
EIGRP)
only enables interfaces for participation.
Is there any explanation for this?
EIGRP Default Route /w ip route 0.0.0.0/0 null0 + network 0.0.0.0
=============================
hostname AS200-1
!
interface FastEthernet0/2
description To Router AS200-5
ip address 10.1.3.1 255.255.255.0
!
router eigrp 200
network 0.0.0.0
no auto-summary
!
ip http server
no ip http secure-server
ip route 0.0.0.0 0.0.0.0 Null0
=============================
AS200-5#r | i _0\.0\.0\.0
Gateway of last resort is 10.1.3.1 to network 0.0.0.0
D* 0.0.0.0/0 [90/28160] via 10.1.3.1, 00:13:26, FastEthernet0/2
=============================
Many Thanks.
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