From: Antonio (twinturbos@xxxxxxxxxxxx)
Date: Wed May 15 2002 - 15:50:02 GMT-3
On router A change it to only this:
router ospf 64
network 10.1.1.0 0.0.0.255 area 0
network 192.1.1.0 0.0.0.255 area 0
network 11.1.1.0 0.0.0.255 area 0
or
int lo 0
ip ospf network point-to-point
That's a start, you should be able to figure out the rest yourself...
----- Original Message -----
From: "Jonathan Hays" <jhays@jtan.com>
To: <ccielab@groupstudy.com>
Sent: Wednesday, May 15, 2002 2:04 PM
Subject: link state database- missing lo0 entries
> I am puzzled why Router A loopback 0 (10.1.1.1/24) and Router B loopback
> 0 (152.1.1.1/24) do not appear in the link state database below. These
> routes do not appear despite the fact the lo0 interfaces are configured
> for OSPF in each router and despite the fact that each router's routing
> table shows an OSPF route for the other router's loopback 0.
>
> I am not new to OSPF but I am looking at every little detail in
> preparation for the CCIE lab. Maybe I need to do some more reading?
>
> Any help would be appreciated.
>
> Jonathan
>
> = = = = =
>
> DETAILS:
>
> This scenario is from Lab #33 of "Cisco CCIE LAB Study Guide, Second
> Edition" by Hutnik and Satterlee.
>
> In brief, two routers are running OSPF over a directly connected serial
> link. I have given relevant configuration for each router at the bottom
> of my post.
>
> Here is the link state database (same on both routers, of course):
>
> RouterA#sh ip ospf database.
>
> OSPF Router with ID (11.1.1.1) (Process ID 64)
>
>
> Router Link States (Area 0)
>
> Link ID ADV Router Age Seq# Checksum Link
> count
> 11.1.1.1 11.1.1.1 599 0x80000006 0xA0A1 3
> 153.1.1.1 153.1.1.1 597 0x80000009 0xFB77 4
> RouterA#
>
> And here is proof that OSPF is running on those loopback 0 interfaces:
> - - - - -
> RouterA#show ip ospf interface
> Loopback0 is up, line protocol is up
> Internet Address 10.1.1.1/24, Area 0
> Process ID 64, Router ID 11.1.1.1, Network Type LOOPBACK, Cost: 1
> Loopback interface is treated as a stub Host
> Serial0 is up, line protocol is up
> Internet Address 192.1.1.1/24, Area 0
> Process ID 64, Router ID 11.1.1.1, Network Type POINT_TO_POINT, Cost:
> 64
> Transmit Delay is 1 sec, State POINT_TO_POINT,
> Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
> Hello due in 00:00:09
> Neighbor Count is 1, Adjacent neighbor count is 1
> Adjacent with neighbor 153.1.1.1
> Suppress hello for 0 neighbor(s)
> RouterA#
> - - - - -
> RouterB#sh ip ospf interface
> Loopback0 is up, line protocol is up
> Internet Address 152.1.1.1/24, Area 0
> Process ID 64, Router ID 153.1.1.1, Network Type LOOPBACK, Cost: 1
> Loopback interface is treated as a stub Host
> Loopback1 is up, line protocol is up
> Internet Address 153.1.1.1/24, Area 0
> Process ID 64, Router ID 153.1.1.1, Network Type LOOPBACK, Cost: 1
> Loopback interface is treated as a stub Host
> Serial0 is up, line protocol is up
> Internet Address 192.1.1.2/24, Area 0
> Process ID 64, Router ID 153.1.1.1, Network Type POINT_TO_POINT, Cost:
> 64
> Transmit Delay is 1 sec, State POINT_TO_POINT,
> Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
> Hello due in 00:00:07
> Neighbor Count is 1, Adjacent neighbor count is 1
> Adjacent with neighbor 11.1.1.1
> Suppress hello for 0 neighbor(s)
> RouterB#
> - - - - -
> And both routers see each other's loopback 0 via OSPF in their routing
> tables.
> RouterA sees 152.1.1.1 which is the loopback 0 on Router B.
> - - - - -
> 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, * - candidate
> default
> U - per-user static route, o - ODR
>
> Gateway of last resort is not set
>
> 153.1.0.0/32 is subnetted, 1 subnets
> O 153.1.1.1 [110/65] via 192.1.1.2, 00:17:38, Serial0
> 152.1.0.0/32 is subnetted, 1 subnets
> O 152.1.1.1 [110/65] via 192.1.1.2, 00:17:38, Serial0
> 10.0.0.0/24 is subnetted, 1 subnets
> C 10.1.1.0 is directly connected, Loopback0
> 11.0.0.0/24 is subnetted, 1 subnets
> C 11.1.1.0 is directly connected, Loopback1
> C 192.1.1.0/24 is directly connected, Serial0
> RouterA#
> - - - - -
> And RouterB sees 10.1.1.1 which is the loopback 0 on Router A.
> - - - - -
> 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, * - candidate
> default
> U - per-user static route, o - ODR
>
> Gateway of last resort is not set
>
> 153.1.0.0/24 is subnetted, 1 subnets
> C 153.1.1.0 is directly connected, Loopback1
> 152.1.0.0/24 is subnetted, 1 subnets
> C 152.1.1.0 is directly connected, Loopback0
> 10.0.0.0/32 is subnetted, 1 subnets
> O 10.1.1.1 [110/65] via 192.1.1.1, 00:16:50, Serial0
> C 192.1.1.0/24 is directly connected, Serial0
> RouterB#
> = = = = =
> CONFIGURATIONS
>
> hostname RouterA
> !
> interface Loopback0
> ip address 10.1.1.1 255.255.255.0
> !
> interface Loopback1
> ip address 11.1.1.1 255.255.255.0
> !
> interface Serial0
> ip address 192.1.1.1 255.255.255.0
> !
> router ospf 64
> network 10.1.1.1 0.0.0.0 area 0
> network 192.1.1.1 0.0.0.0 area 0
> = = = = =
> hostname RouterB
> !
> interface Loopback0
> ip address 152.1.1.1 255.255.255.0
> !
> interface Loopback1
> ip address 153.1.1.1 255.255.255.0
> !
> interface Serial0
> ip address 192.1.1.2 255.255.255.0
> clockrate 500000
> !
> router ospf 64
> network 0.0.0.0 255.255.255.255 area 0
> !
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:58:57 GMT-3