OSPF NSSA Problem

Hey guys, shouldn't the 172 network configured on R3 show on R1's routing table?

R1#sho ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
C       10.1.1.0/24 is directly connected, Loopback1
O       10.1.2.1/32 [110/2] via 10.1.12.2, 00:14:10, FastEthernet0/0
O IA    10.1.3.1/32 [110/3] via 10.1.12.2, 00:14:10, FastEthernet0/0
C       10.1.12.0/24 is directly connected, FastEthernet0/0
O IA    10.1.23.0/24 [110/2] via 10.1.12.2, 00:14:10, FastEthernet0/0
R1#

R1#show run
Building configuration...

Current configuration : 604 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
!
!
!
!
!
!
!
ip name-server 0.0.0.0
!
!
!
!
!
!
interface Loopback1
 ip address 10.1.1.1 255.255.255.0
!
interface FastEthernet0/0
 ip address 10.1.12.1 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
router ospf 1
 log-adjacency-changes
 network 10.1.12.0 0.0.0.255 area 0
 network 10.1.1.0 0.0.0.255 area 0
!
ip classless
!
!
!
!
!
!
!
!
!
line con 0
line vty 0 4
 login
!
!
!
end


R1#show run
Building configuration...

Current configuration : 604 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
!
!
!
!
!
!
!
ip name-server 0.0.0.0
!
!
!
!
!
!
interface Loopback1
 ip address 10.1.1.1 255.255.255.0
!
interface FastEthernet0/0
 ip address 10.1.12.1 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
router ospf 1
 log-adjacency-changes
 network 10.1.12.0 0.0.0.255 area 0
 network 10.1.1.0 0.0.0.255 area 0
!
ip classless
!
!
!
!
!
!
!
!
!
line con 0
line vty 0 4
 login
!
!
!
end




R2#sho run
Building configuration...

Current configuration : 643 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R2
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback2
 ip address 10.1.2.1 255.255.255.0
!
interface FastEthernet0/0
 ip address 10.1.12.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 10.1.23.2 255.255.255.0
 duplex auto
 speed auto
!
router ospf 1
 log-adjacency-changes
 area 23 nssa
 network 10.1.12.0 0.0.0.255 area 0
 network 10.1.2.0 0.0.0.255 area 0
 network 10.1.23.0 0.0.0.255 area 23
!
ip classless
!
!
!
!
!
!
!
!
!
line con 0
line vty 0 4
 login
!
!
!
end


R2#sho run
Building configuration...

Current configuration : 643 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R2
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback2
 ip address 10.1.2.1 255.255.255.0
!
interface FastEthernet0/0
 ip address 10.1.12.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 10.1.23.2 255.255.255.0
 duplex auto
 speed auto
!
router ospf 1
 log-adjacency-changes
 area 23 nssa
 network 10.1.12.0 0.0.0.255 area 0
 network 10.1.2.0 0.0.0.255 area 0
 network 10.1.23.0 0.0.0.255 area 23
!
ip classless
!
!
!
!
!
!
!
!
!
line con 0
line vty 0 4
 login
!
!
!
end






R3#show run
Building configuration...

Current configuration : 715 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R3
!
!
!
!
!
!
!
!
!
!
ip name-server 0.0.0.0
!
!
!
!
!
!
interface Loopback3
 ip address 10.1.3.1 255.255.255.0
!
interface Loopback20
 ip address 172.20.200.1 255.255.255.0
!
interface FastEthernet0/0
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface FastEthernet0/1
 ip address 10.1.23.3 255.255.255.0
 duplex auto
 speed auto
!
router ospf 1
 log-adjacency-changes
 area 23 nssa
 redistribute connected subnets 
 network 10.1.23.0 0.0.0.255 area 23
 network 10.1.3.0 0.0.0.255 area 23
!
ip classless
!
!
!
!
!
!
!
!
!
line con 0
line vty 0 4
 login
!
!
!
end

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Comments

Daniel333

Why is it that I can spend an hour staring at something and not get it, yet once I post it thus making a fool of myself I get it a minute later.

For the record the area 23 nssa needed the "no-summ" on the the, since it' can't summerize the 172.x.x.x in to the 10.x.x.x....

BennyLava

Are you sure you didn't change something else also? Adding 'no-summary' on the ABR just stops type-3 LSAs from being sent into area 23, it shouldn't affect R1 at all. Your configs that you posted look fine to me as is.

BennyLava

I just pasted your configs in, it seems to work fine for me:

R1(config)#do sh ip rou
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

172.20.0.0/24 is subnetted, 1 subnets
O E2 172.20.200.0 [110/20] via 10.1.12.2, 00:00:04, FastEthernet0/0
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
C 10.1.12.0/24 is directly connected, FastEthernet0/0
O 10.1.2.1/32 [110/2] via 10.1.12.2, 00:00:04, FastEthernet0/0
O IA 10.1.3.1/32 [110/3] via 10.1.12.2, 00:00:04, FastEthernet0/0
C 10.1.1.0/24 is directly connected, Loopback1
O IA 10.1.23.0/24 [110/2] via 10.1.12.2, 00:00:04, FastEthernet0/0

R2#sh ip rou
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

172.20.0.0/24 is subnetted, 1 subnets
O N2 172.20.200.0 [110/20] via 10.1.23.3, 00:00:20, FastEthernet0/1
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
C 10.1.12.0/24 is directly connected, FastEthernet0/0
O 10.1.3.1/32 [110/2] via 10.1.23.3, 00:00:20, FastEthernet0/1
C 10.1.2.0/24 is directly connected, Loopback2
O 10.1.1.1/32 [110/2] via 10.1.12.1, 00:00:10, FastEthernet0/0
C 10.1.23.0/24 is directly connected, FastEthernet0/1

R3(config)#do sh ip rou
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

172.20.0.0/24 is subnetted, 1 subnets
C 172.20.200.0 is directly connected, Loopback20
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
O IA 10.1.12.0/24 [110/2] via 10.1.23.2, 00:00:17, FastEthernet0/1
C 10.1.3.0/24 is directly connected, Loopback3
O IA 10.1.2.1/32 [110/2] via 10.1.23.2, 00:00:17, FastEthernet0/1
O IA 10.1.1.1/32 [110/3] via 10.1.23.2, 00:00:17, FastEthernet0/1
C 10.1.23.0/24 is directly connected, FastEthernet0/1

EdTheLad

Daniel333 wrote: »

For the record the area 23 nssa needed the "no-summ" on the the, since it' can't summerize the 172.x.x.x in to the 10.x.x.x....

No-summary on R2 would just turn area 23 into a NSSA totally stubby area.I love this terminology!

Daniel333

Given that it worked for you, I am thinking Packet Tracer is at fault. It's not the first time it's acted weird. Ill fire up some real router tomorrow and try it out.

But from your output it seems like even without the no-summ on there it still distributed the 172 network, and summerized it?

kryolla

Daniel333 wrote: »

Given that it worked for you, I am thinking Packet Tracer is at fault. It's not the first time it's acted weird. Ill fire up some real router tomorrow and try it out.

But from your output it seems like even without the no-summ on there it still distributed the 172 network, and summerized it?

I think you are confused what no-summary means. All it means is no LSA-3 will be going INTO the area it is not summarizing anything. In order to summarize you need area range command or for external it is summary-address

Xenz

Daniel333 wrote: »

Given that it worked for you, I am thinking Packet Tracer is at fault. It's not the first time it's acted weird. Ill fire up some real router tomorrow and try it out.

But from your output it seems like even without the no-summ on there it still distributed the 172 network, and summerized it?

Packet tracer for CCNP stuff? No way to use dynamips/GNS? Packet tracer was shifty enough covering some of the late CCNA topics. I can't imagine trying to use it for CCNP studies.

Daniel333

kryolla wrote: »

I think you are confused

No doubt about that! I think messing with this fancy Cisco stuff was a mistake.

Xenz wrote:

Packet tracer for CCNP stuff? No way to use dynamips/GNS? Packet tracer was shifty enough covering some of the late CCNA topics. I can't imagine trying to use it for CCNP studies.

1ghz laptop, GNS3 doesn't have a chance

kryolla

Daniel333 wrote: »

No doubt about that! I think messing with this fancy Cisco stuff was a mistake.

I dont think its a mistake you just have to keep on working on it and it will all make sense

Bosefus

Daniel333 wrote: »

Given that it worked for you, I am thinking Packet Tracer is at fault. It's not the first time it's acted weird.

I second this. Packet tracer does some funky stuff sometimes.