From: Landon Fitts (l.fitts@xxxxxxxxxxxxxx)
Date: Wed Feb 06 2002 - 00:56:49 GMT-3
The command to set an area as "totally stubby" is
"area x stub no-summary" on the ABR. You used
"area x nssa no-summary", which only blocks LSA of type 3
and 4 into the "nssa". See Doyle, Vol 1 pages 536-538.
Landon Fitts,
NNCSE, NNCDE, CCNP, CCDP, CCIE Lab Candidate
l.fitts@mindspring.com
----- Original Message -----
From: "Greg Sporton" <greg.sporton@nec.com.au>
To: <ccielab@groupstudy.com>
Sent: Tuesday, February 05, 2002 9:10 PM
Subject: OSPF Totally Stubby Area
> Hi all,
>
> I've got a funny situation with OSPF Redistribution and OSPF Totally
> Stubby Areas. My routers are connected as below:
>
> R5-------R6
> | |
> | |
> R1 R2
>
> Area 0 Between R5 and R6.
> Area 1 Between R1 and R5.
> Area 2 Between R6 and R2.
>
> I have created a loopback interface on R5 and placed it into RIP. I then
> redistribute RIP into OSPF. Both Area 1 and 2 are configured as Totally
> Stubby Areas as show below:
>
> R1:
> router ospf 1
> area 1 nssa
> network 192.168.1.1 0.0.0.0 area 1
>
> R5:
> router ospf 1
> area 1 nssa no-summary
> redistribute rip metric 200 metric-type 1 subnets
> network 192.168.0.1 0.0.0.0 area 0
> network 192.168.1.2 0.0.0.0 area 1
>
> R6:
> router ospf 1
> area 2 nssa no-summary
> network 192.168.0.2 0.0.0.0 area 0
> network 192.168.2.2 0.0.0.0 area 2
>
> R2:
> router ospf 1
> area 2 nssa
> network 192.168.2.1 0.0.0.0 area 2
>
> The routing table on R2 looks as I would expect:
>
> C 192.168.2.0/24 is directly connected, Serial0/0.1
> O*IA 0.0.0.0/0 [110/391] via 192.168.2.2, 01:15:10, Serial0/0.1
>
> But looking at R1, I can't understand why the NSSA Type 1 route is
> appearing in the routing table:
>
> O N1 10.0.0.0/8 [110/590] via 192.168.1.2, 00:18:26, Serial0/0.1
> C 192.168.1.0/24 is directly connected, Serial0/0.1
> O*IA 0.0.0.0/0 [110/391] via 192.168.1.2, 00:18:26, Serial0/0.1
>
> From my understanding a Totally Stubby Area should not inject any
> External routes into the Area but the 10.0.0.0 network is in the OSPF
> Database as a Type 7 LSA. Any ideas why I am still seeing this route?
>
> Regards,
>
> Greg.
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