From: Alex De Gruiter \(AU\) (Alex.deGruiter@didata.com.au)
Date: Wed Jul 19 2006 - 20:38:41 ART
There are 2 ways to distribute a static route into EIRGP - using
redistribution or flagging specific routes as candidate defaults.
The 1st method you have in the configuration, "redistribute static
route-map DEFAULT_STATIC_REDISTR", redistributes those routes you desire
(in your case, static, and according to your route map).
The 2nd method is a little more interesting; EIGRP traditionally
operates by flagging candidate routes in the routing table, rather than
generating a default 0.0.0.0/0 route into the process. If you have a
default candidate network specified on the hub route, that route can be
flagged to the spoke routers as a potential default route. You control
the networks which are valid candidates with the access-list. For
example, if you have the following configuration:
Router#
interface serial 0/0
ip address 192.168.7.1 255.255.255.252
interface Ethernet 0/0
ip address 172.16.1.1 255.255.255.0
ip default-network 192.168.7.0
router eigrp 1
default-information out 3
network 172.16.1.0 0.0.0.2555
network 192.168.7.0
access-list 3 permit 192.168.7.0
The subnet 192.168.7.0/30 is flagged as a candidate default route on the
hub router by virtue of the "ip default-network" command. However this
route is also flagged in EIGRP advertisements as a candidate default -
you'll see it in the routing table with an "*".
The access-list indicates which routes should be flagged as defaults
(or, depending on whether the glass is half full or empty, what routes
should not be). The ACL is an optional parameter - if you don't apply an
ACL, then all candidate default routes are flagged when advertised.
Applying an ACL allows you to restrict the routes that will be
advertised, potentially useful if you have multiple candidate defaults,
and want to control what will and will not be advertised.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Jens Petter
Sent: Thursday, 20 July 2006 1:30 AM
To: 'CCIE LAB'
Subject: sending default with eigrp
Hi,
I am trying to send a default route with eigrp to other routers..
This is my config :
router eigrp 1
redistribute static route-map DEFAULT_STATIC_REDISTR
passive-interface default
no passive-interface GigabitEthernet0/2
no passive-interface ATM1/0.3
network 213.162.233.108 0.0.0.3
network 213.162.235.16 0.0.0.3
default-information out DEFAULT
no auto-summary
ip access-list standard DEFAULT
permit 0.0.0.0
route-map DEFAULT_STATIC_REDISTR permit 1
match ip address DEFAULT
This is coming in fine to the eigrp topology table and routing table on
the
other routers..
nhus-gw#sh ip eig to
IP-EIGRP Topology Table for AS(1)/ID(213.225.71.129)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 0.0.0.0/0, 1 successors, FD is 284160
via 213.162.235.17 (284160/28160), Ethernet3/0
D*EX 0.0.0.0/0 [170/284160] via 213.162.235.17, 1d03h, Ethernet3/0
But what I am wondering is what is the default-information out DEFAULT
Command really do. From what I see the default is sent fine without it
to the other routers.. So why do we need this command and when do we
need it..???
Jens
This archive was generated by hypermail 2.1.4 : Tue Aug 01 2006 - 07:13:48 ART