Advertise route as OSPF, but I see it as "EIGRP" ?

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Sep 12th, 2006
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Sorry if this is a stupid question but I don't understand well why I am able to see route

D 152.1.1.4/30 on RouterD.


Basically the network 152.1.1.4/30 has been advertised via OSPF on RouterC interface. However, that was not advertised there as an EIGRP route...

How come I am able to see it on RouterD as EIGRP ?


Please find attached complete run config.

Please note I am doing one-way redistribution EIGRP->OSPF. Therefore in my view that doesn't justify the EIGRP route for 152.1.1.4/30 on RouterD.


RouterB so]===[s0 RouterC s01]===[s0 RouterD]


RouterB s0=152.1.1.5/30

RouterB S1=152.1.1.6/30


RouterD S0=152.1.2.2/24



From RouterD:


Gateway of last resort is not set


152.1.0.0/16 is variably subnetted, 3 subnets, 2 masks

C 152.1.3.0/24 is directly connected, Loopback0

C 152.1.2.0/24 is directly connected, Serial0/0

D 152.1.1.4/30 [90/2681856] via 152.1.2.1, 00:01:58, Serial0/0



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Edison Ortiz Tue, 09/12/2006 - 20:10
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Can we see routerD and routerC running config ?

news2010a Tue, 09/12/2006 - 21:41
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Hi Edison,

It is attached.

However Sundar hit the nail;

I advertised using the inverse mask and I was no longer able to see the route onto RouterD (EIGRP).


Thanks !



jackyoung Tue, 09/12/2006 - 22:04
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It was because you include S0/0 of router C in EIGRP by the network command. The 150.1.1.4/30 fall into 150.1.0.0 of EIGRP. If you want to enable S0/1 of router C only. You can use below network in the EIGRP of router C.


network 150.1.2.0 255.255.255.0


Hope this helps.




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