Hey gang,
I've been using Packet Tracer (v7) to do a little bit of design work and what not, and I noticed a peculiar problem when I simulate a link failure in a very basic OSPF environment. At first I thought maybe it was my config (knocking some dust off, and I was playing with multi-area OSPF), but I stripped it down the vanilla-est of vanilla with a single area OSPF config, and I'm still having the same problem.
So, the problem: Whenever I simulate a link failure on any of my routers, I lose ALL of their previously learned OSPF routes, and they never recalculate routes no matter how long I wait. Is this a bug in PT v7? All of the OSPF timers are set to default. All routers still show adjacency with their directly connected neighbors. I feel like I'm either going crazy, or I'm missing something so obvious that I'm going to be embarrassed. Thanks for any help!
I pasted the configs below. Like I said, vanilla.
When I simulate the link failure between R1 and R3, debug shows the following output:
Interface down or detached
00:23:34: OSPF: Build router LSA for area 0, router ID 10.3.3.3, seq 0xffffffff80000008
00:23:34: OSPF: DR/BDR election on GigabitEthernet0/0
00:23:34: OSPF: Elect BDR 0.0.0.0
00:23:34: OSPF: Elect DR 0.0.0.0
00:23:34: OSPF: Elect BDR 0.0.0.0
00:23:34: OSPF: Elect DR 0.0.0.0
00:23:34: DR: none BDR: none
00:23:34: OSPF: Build router LSA for area 0, router ID 10.3.3.3, seq 0xffffffff80000009
00:23:34: OSPF: Build router LSA for area 0, router ID 10.3.3.3, seq 0xffffffff80000009
00:23:42: OSPF: Rcv hello from 10.2.2.2 area 0 from GigabitEthernet0/2 10.3.10.6
00:23:42: OSPF: End of hello processing
R3#show ip ospf ne
Neighbor ID Pri State Dead Time Address Interface
10.2.2.2 1 FULL/BDR 00:00:33 10.3.10.6 GigabitEthernet0/2
R3#
00:31:02: OSPF: Rcv hello from 10.2.2.2 area 0 from GigabitEthernet0/2 10.3.10.6
_____________________________________________
Configs:
R1:
Current configuration : 877 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
ip cef
no ipv6 cef
license udi pid CISCO2911/K9 sn FTX15246X2G
spanning-tree mode pvst
interface Loopback1
ip address 10.1.1.1 255.255.255.255
!
interface GigabitEthernet0/0
ip address 10.3.10.10 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet0/1
ip address 10.3.10.1 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet0/2
no ip address
duplex auto
speed auto
shutdown
!
interface Vlan1
no ip address
shutdown
!
router ospf 1
log-adjacency-changes
network 10.3.10.0 0.0.0.3 area 0
network 10.3.10.8 0.0.0.3 area 0
!
ip classless
!
ip flow-export version 9
line con 0
!
line aux 0
!
line vty 0 4
login
end
______________________________________________
R2:
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R2
!
ip cef
no ipv6 cef
!
license udi pid CISCO2911/K9 sn FTX1524CG3O
!
spanning-tree mode pvst
interface Loopback1
ip address 10.2.2.2 255.255.255.255
!
interface GigabitEthernet0/0
no ip address
duplex auto
speed auto
shutdown
!
interface GigabitEthernet0/1
ip address 10.3.10.2 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet0/2
ip address 10.3.10.6 255.255.255.252
duplex auto
speed auto
!
interface Vlan1
no ip address
shutdown
!
router ospf 1
log-adjacency-changes
network 10.3.10.0 0.0.0.3 area 0
network 10.3.10.4 0.0.0.3 area 0
!
ip classless
!
ip flow-export version 9
line con 0
!
line aux 0
!
line vty 0 4
login
end
____________________________________________
R3:
Current configuration : 876 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R3
!
ip cef
no ipv6 cef
!
license udi pid CISCO2911/K9 sn FTX152417FF
!
spanning-tree mode pvst
!
interface Loopback1
ip address 10.3.3.3 255.255.255.255
!
interface GigabitEthernet0/0
ip address 10.3.10.9 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface GigabitEthernet0/2
ip address 10.3.10.5 255.255.255.252
duplex auto
speed auto
!
interface Vlan1
no ip address
shutdown
!
router ospf 1
log-adjacency-changes
network 10.3.10.4 0.0.0.3 area 0
network 10.3.10.8 0.0.0.3 area 0
!
ip classless
!
ip flow-export version 9
!
line con 0
!
line aux 0
!
line vty 0 4
login
end
