From: Ivan Kuchin (ivan@iip.net)
Date: Thu Jul 20 2006 - 06:34:18 ART
One more method inject default route into EIGRP process is summary up to
0.0.0.0/0 on the interface.
int f0/0.950
ip summary-address eigrp 5429 0.0.0.0 0.0.0.0
my 2 cent
> 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.
-- iWAN kU^IN (mail to: ivan@iip.net) NOC iip.net 137-31-04
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