RE: Two Default Routes which path?

From: kevin mitnick (kevin_ross46@xxxxxxxxxxx)
Date: Thu May 16 2002 - 00:49:24 GMT-3


   
Hansang,

Even with the maximim-path set , I still get two
routes to default with only one prefered. Here is a
"show ip route" I captured from rouer A
Gateway of last resort is 165.21.200.9 to network
0.0.0.0

     172.16.0.0/24 is subnetted, 1 subnets
C 172.16.6.0 is directly connected, Loopback1
C 192.168.50.0/24 is directly connected, Ethernet0
     165.21.0.0/30 is subnetted, 4 subnets
C 165.21.200.8 is directly connected, Serial0.2
C 165.21.200.12 is directly connected, Serial0.3
O 165.21.200.0 [110/128] via 165.21.200.14,
00:01:36, Serial0.3
O 165.21.200.4 [110/128] via 165.21.200.9,
00:01:36, Serial0.2
O*E2 0.0.0.0/0 [110/1] via 165.21.200.9, 00:01:36,
Serial0.2
               [110/1] via 165.21.200.14, 00:01:37,
Serial0.3

 --- Hansang Bae <hbae@nyc.rr.com> wrote: > At 02:39
AM 5/16/2002 +0100, kevin mitnick wrote:
> >I have tested this scenario with 4 OSPF routers
> linked
> >in a ring topology.
> >
> >A--B--C--D (D connected to A)
> >
> >Router B and D originate default.
> >
> >I configured two routers B and C to orignate
> default
> >with equal cost. The other two routers who recieve
> the
> >LSA's from the default originating routers will
> only
> >choose one best default path although their routing
> >table indicates an alternaive parth. There is
> somthing
> >special about how default routes are treated. I
> have
> >yet to put my finger on it.
>
>
> If you want OSPF to choose multiple equal cost
> routes, you need "maximum-path blah" under ROUTER
> OSPF PID.
>
> Are you sure your defaults are *both* in the routing
> table?
>
> hsb
>



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