[c-nsp] Strange behavior OSPF Default route

Harold Ritter (hritter) hritter at cisco.com
Fri Apr 27 18:13:45 EDT 2007


Omar,

This default route is most probably generated by some other device. Can
you do a "show ip ospf da ext 0.0.0.0" and check the advertising router.
It is probably different then the RID of the Central router.  

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of omar parihuana
Sent: Friday, April 27, 2007 5:55 PM
To: nsp
Subject: [c-nsp] Strange behavior OSPF Default route

Hi Folks,

I've figure out a strange behavior with OSPF Default route generation.
I have static routes then I redistributed into OSPF, but Default Route
also is redistributed!!!!, So far I know that the default route
generation is accomplished with default-information originate command.
Why default route is redistributed??? maybe some bug? I copy confs:

Central Router:

!
router ospf 1
 log-adjacency-changes
 redistribute static
 network 172.16.1.0 0.0.0.255 area 0
 network x.x.x.96 0.0.0.31 area 0
!
ip route 0.0.0.0 0.0.0.0 x.x.x.97
!

Remote Router:

!
router ospf 1
 log-adjacency-changes
 network 172.16.1.0 0.0.0.255 area 0
!

Remote#sh ip route | inc \*
       ia - IS-IS inter area, * - candidate default, U - per-user static
route
O*E1 0.0.0.0/0 [110/21] via 172.16.1.53, 11:39:10, Serial0/0:0

The IOS used in Central site is: slot0:c7200-jo3s-mz.122-12.bin

Rgds.

--
Omar E.P.T
-----------------
Certified Networking Professionals make better Connections!
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