At 03:59 PM 4/7/01 -0400, Fred Danson wrote:
Fred I setup Lab #30 just to see if I would experience the same thing,
and initially I did, until I rebooted RouterA (your R2503).
Somehow rebooting allowed reachability and I was able to ping
the 152.1.1.1 address (actaully I used 192.168.104.3).
I also noticed the "ip ospf interface-retry 0" on several interfaces
in your config, I had them in mine's also. I gotta look that one up
but I suspect that it appears in the config because the opposite side
of the link hasn't been initialized or configured yet!
After I deleted all the "ip ospf interface-retry 0" entries off the
interface configs and rebooted all three routers, I still have
reachibility to 192.168.104.3 (your 152.1.1.1) and also found
that network 192.168.104.0 (your 152.1.0.0) is in the routing
table of RouterB (your 2523).
I have all the router configs and sh commands as well as the
capture of the successful ping, but I'll reserve posting them
to save bandwidth until I hear if you rebooted and cleaned up
the configs and your problem still exist.
Stefan
>Hey group,
>
>I am in the middle of Lab #30 from the CCIE Lab Study Guide which involves
>OSPF virtual links. Here's my configs:
>
>R2503 - backbone router
>hostname r2503
>!
>!
>ip subnet-zero
>!
>!
>!
>interface Loopback0
>ip address 1.1.1.1 255.255.255.0
>no ip directed-broadcast
>!
>interface Ethernet0
>no ip address
>no ip directed-broadcast
>shutdown
>!
>interface Serial0
>ip address 192.1.1.1 255.255.255.0
>no ip directed-broadcast
>ip ospf interface-retry 0
>no ip mroute-cache
>no fair-queue
>!
>interface Serial1
>no ip address
>no ip directed-broadcast
>shutdown
>!
>interface BRI0
>no ip address
>no ip directed-broadcast
>shutdown
>!
>router ospf 100
>network 192.1.1.1 0.0.0.0 area 0
>!
>ip classless
>!
>!
>!
>line con 0
>transport input none
>line aux 0
>line vty 0 4
>!
>end
>
>--------------------------------------------------
>
>R2523- backbone router, link between R2503 & R4000
>hostname r2523
>!
>!
>ip subnet-zero
>!
>!
>!
>interface Loopback0
>ip address 2.2.2.2 255.255.255.0
>no ip directed-broadcast
>!
>interface Serial0
>ip address 193.1.1.2 255.255.255.0
>no ip directed-broadcast
>ip ospf interface-retry 0
>no ip mroute-cache
>no fair-queue
>!
>interface Serial1
>ip address 192.1.1.2 255.255.255.0
>no ip directed-broadcast
>ip ospf interface-retry 0
>clockrate 64000
>!
>interface Serial2
>no ip address
>no ip directed-broadcast
>shutdown
>!
>interface Serial3
>no ip address
>no ip directed-broadcast
>shutdown
>!
>interface Serial4
>no ip address
>no ip directed-broadcast
>shutdown
>!
>interface Serial5
>no ip address
>no ip directed-broadcast
>shutdown
>!
>interface Serial6
>no ip address
>no ip directed-broadcast
>shutdown
>!
>interface Serial7
>no ip address
>no ip directed-broadcast
>shutdown
>!
>interface Serial8
>no ip address
>no ip directed-broadcast
>shutdown
>!
>interface Serial9
>no ip address
>no ip directed-broadcast
>shutdown
>!
>interface TokenRing0
>no ip address
>no ip directed-broadcast
>shutdown
>!
>interface BRI0
>no ip address
>no ip directed-broadcast
>shutdown
>!
>router ospf 100
>area 1 virtual-link 3.3.3.3
>network 192.1.1.2 0.0.0.0 area 0
>network 193.1.1.2 0.0.0.0 area 1
>!
>ip classless
>!
>!
>!
>line con 0
>transport input none
>line aux 0
>line vty 0 4
>!
>end
>
>-----------------------------------------
>
>R4000, in areas 1 & 4, has a virtual link through R2523
>hostname r4000
>!
>!
>!
>!
>interface Loopback0
>ip address 3.3.3.3 255.255.255.0
>!
>interface Ethernet0
>ip address 152.1.1.1 255.255.255.0
>no keepalive
>media-type 10BaseT
>!
>interface Serial0
>ip address 193.1.1.1 255.255.255.0
>no ip mroute-cache
>no fair-queue
>clockrate 64000
>!
>interface Serial1
>no ip address
>shutdown
>!
>interface TokenRing0
>no ip address
>shutdown
>!
>router ospf 100
>network 152.1.1.1 0.0.0.0 area 4
>network 193.1.1.1 0.0.0.0 area 1
>area 1 virtual-link 2.2.2.2
>!
>ip classless
>!
>!
>!
>line con 0
>line aux 0
>line vty 0 4
>login
>!
>end
>
>-------------------------------------
>
>the virtual link seems to be working fine. Here's a paste of
>show ip ospf virtual-link from r2523
>r2523#show ip ospf vir
>Virtual Link OSPF_VL0 to router 3.3.3.3 is up
> Run as demand circuit
> DoNotAge LSA allowed.
> Transit area 1, via interface Serial0, Cost of using 64
> Transmit Delay is 1 sec, State POINT_TO_POINT,
> Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
> Hello due in 00:00:01
> Adjacency State FULL (Hello suppressed)
>
>Here's a paste of show ip ospf virtual-link from r4000
>r4000#show ip ospf vir
>Virtual Link OSPF_VL0 to router 2.2.2.2 is up
> Run as demand circuit
> DoNotAge LSA allowed.
> Transit area 1, via interface Serial0, Cost of using 64
> Transmit Delay is 1 sec, State POINT_TO_POINT,
> Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
> Hello due in 00:00:03
> Adjacency State FULL (Hello suppressed)
>
>Here's the problem. I cannot ping r4000's ethernet interface (which is in
>area 4) from r2503. the network statement for 152.1.1.0/24 is in r2503's
>route table, but not in r2523's route table.
>
>r2503#show 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, * - candidate
>default
> U - per-user static route, o - ODR
>
>Gateway of last resort is not set
>
> 1.0.0.0/24 is subnetted, 1 subnets
>C 1.1.1.0 is directly connected, Loopback0
> 152.1.0.0/24 is subnetted, 1 subnets
>O IA 152.1.1.0 [110/138] via 192.1.1.2, 00:17:22, Serial0
>O IA 193.1.1.0/24 [110/128] via 192.1.1.2, 00:17:22, Serial0
>C 192.1.1.0/24 is directly connected, Serial0
>
>r2523#show 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, * - candidate
>default
> U - per-user static route, o - ODR
>
>Gateway of last resort is not set
>
> 2.0.0.0/24 is subnetted, 1 subnets
>C 2.2.2.0 is directly connected, Loopback0
>C 193.1.1.0/24 is directly connected, Serial0
>C 192.1.1.0/24 is directly connected, Serial1
>
>When I try to ping 152.1.1.1 from r2503, I get U.U.U. This makes total sense
>because r2523 does not have a route for it in its table, but the question
>is: Why doesn't r2523 have a route for 152.1.1.0/24 in its table?
>
>If someone can spot a mistake in my config, or even give me an idea, please
>feel free. :)
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