From: David Ham (ccieau@xxxxxxxxxxx)
Date: Sat Aug 24 2002 - 22:18:58 GMT-3
Hunt,
Firstly. RTA and RTB ospf process-id is different from each other.
Secondly. you might need to put network 51.51.0.0 0.0.0.63 area 0
Regards,
David Ham
>From: Hunt Lee <ciscoforme3@yahoo.com.au>
>Reply-To: Hunt Lee <ciscoforme3@yahoo.com.au>
>To: ccielab@groupstudy.com
>Subject: Route missing in OSPF Topological Database
>Date: Sat, 24 Aug 2002 22:53:10 +1000 (EST)
>
>Here is a partial diagram:
>
> 51.51.0.1/26
> /
> /
>1.1.1.1/32 -- RTA --- RTB --- 2.2.2.2/32
> \
> \
> 100.100.100.1/32
>
>N.B: The link connecting between RTA & RTB is 172.16.1.0/24
>
>At RTB:-
>
>router ospf 2
> log-adjacency-changes
> redistribute eigrp 1 subnets
> network 2.2.2.2 0.0.0.0 area 2
> network 51.0.0.0 0.255.255.255 area 0
> network 100.100.100.1 0.0.0.0 area 2
> network 172.16.1.0 0.0.0.255 area 0
>
>
>At RTA:-
>
>router ospf 1
> router-id 1.1.1.1
> log-adjacency-changes
> network 1.1.1.1 0.0.0.0 area 0
> network 172.16.1.0 0.0.0.255 area 0
> distance ospf intra-area 30 inter-area 20 external 50
>
>
>Here is what I don't understand :( RTB has a loopback interface
>(51.51.0.1/26), which is advertised to RTA as O (Intra-Area route).
>RTA can see this route in it's Routing Table, & can ping it too!!
>But I just can't find it in RTA's OSPF Topological database. But if
>the route is not in RTA's OSPF database, how does it get learned by
>RTA in the first place??
>
>RouterB#sh 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
>
> 51.0.0.0/26 is subnetted, 1 subnets
>C 51.51.0.0 is directly connected, Loopback1
> 1.0.0.0/32 is subnetted, 1 subnets
>O 1.1.1.1 [110/11] via 172.16.1.1, 00:01:17, Ethernet0
> 2.0.0.0/32 is subnetted, 1 subnets
>C 2.2.2.2 is directly connected, Loopback0
> 100.0.0.0/32 is subnetted, 1 subnets
>C 100.100.100.1 is directly connected, Loopback2
> 3.0.0.0/24 is subnetted, 1 subnets
>D 3.3.3.0 [90/2297856] via 10.1.1.6, 00:03:41, Serial0
> 172.16.0.0/24 is subnetted, 1 subnets
>C 172.16.1.0 is directly connected, Ethernet0
> 10.0.0.0/30 is subnetted, 1 subnets
>C 10.1.1.4 is directly connected, Serial0
>RouterB#
>
>And I can see the route 51.51.0.0/26 in RTA's Routing Table..
>
>RouterA#sh 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
>
> 51.0.0.0/26 is subnetted, 1 subnets
>O 51.51.0.0 [30/11] via 172.16.1.2, 00:02:01, Ethernet0
> 1.0.0.0/18 is subnetted, 1 subnets
>C 1.1.0.0 is directly connected, Loopback0
> 2.0.0.0/32 is subnetted, 1 subnets
>O IA 2.2.2.2 [20/11] via 172.16.1.2, 00:02:01, Ethernet0
> 100.0.0.0/32 is subnetted, 1 subnets
>O IA 100.100.100.1 [20/11] via 172.16.1.2, 00:02:01, Ethernet0
> 3.0.0.0/24 is subnetted, 1 subnets
>O E2 3.3.3.0 [50/20] via 172.16.1.2, 00:02:01, Ethernet0
> 172.16.0.0/24 is subnetted, 1 subnets
>C 172.16.1.0 is directly connected, Ethernet0
> 10.0.0.0/30 is subnetted, 1 subnets
>O E2 10.1.1.4 [50/20] via 172.16.1.2, 00:02:03, Ethernet0
>
>
>RouterA#ping 51.51.0.1
>
>Type escape sequence to abort.
>Sending 5, 100-byte ICMP Echos to 51.51.0.1, timeout is 2 seconds:
>!!!!!
>Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/8 ms
>
>
>But the route is not in RTA's OSPF Database...
>
>RouterA#sh ip ospf database
>
> OSPF Router with ID (1.1.1.1) (Process ID 1)
>
> Router Link States (Area 0)
>
>Link ID ADV Router Age Seq# Checksum Link count
>1.1.1.1 1.1.1.1 951 0x80000005 0xB7D2 2
>100.100.100.1 100.100.100.1 231 0x80000009 0xEFC 2
>
> Net Link States (Area 0)
>
>Link ID ADV Router Age Seq# Checksum
>172.16.1.2 100.100.100.1 957 0x80000001 0x31E8
>
> Summary Net Link States (Area 0)
>
>Link ID ADV Router Age Seq# Checksum
>2.2.2.2 100.100.100.1 975 0x80000002 0xC53F
>100.100.100.1 100.100.100.1 975 0x80000002 0xF9E4
>
> Type-5 AS External Link States
>
>Link ID ADV Router Age Seq# Checksum Tag
>3.3.3.0 100.100.100.1 976 0x80000002 0xA5E 0
>10.1.1.4 100.100.100.1 977 0x80000002 0xA2C1 0
>RouterA#
>
>
>Any ideas will be greatly appreciated.
>
>Best Regards,
>Hunt
>
>http://digital.yahoo.com.au - Yahoo! Digital How To
>- Get the best out of your PC!
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