Packet Tracer OSPF RID

Hey guys,

Just configuring OSPF and I added a loopback of 1.1.1.1 to one of my routers and then added the ospf config but the loopback wasn't chosen as the DR. Do you know if PT has a fault with using the loopback over other ip addresses configured? Am I right in thinking it should have chosen this loopback?
-this is on an ethernet segment so the DR and BDR is to be chosen.

thanks

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Comments

Eildor

alliasneo wrote: »

Hey guys,

Just configuring OSPF and I added a loopback of 1.1.1.1 to one of my routers and then added the ospf config but the loopback wasn't chosen as the DR. Do you know if PT has a fault with using the loopback over other ip addresses configured? Am I right in thinking it should have chosen this loopback?
-this is on an ethernet segment so the DR and BDR is to be chosen.

thanks

Have you tried clearing the OSPF process using the "clear ip ospf process" command?

SubnetZero

Did you clear the OSPF process on your routers? The OSPF RID will not change until you reset the OSPF process. The same thing is true for DR/BDR elections since they aren't preemptive in nature.

Try "clear ip ospf process"

HTH

alliasneo

yeah I have just tried that but still the same:

Router#clear ip ospf ?
process Reset OSPF process
Router#clear ip ospf pro
Reset ALL OSPF processes? [no]: y

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on Serial2/0 from FULL to DOWN, Neighbor Down: Adjacency forced to reset

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on Serial2/0 from FULL to DOWN, Neighbor Down: Interface down or detached

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 172.168.0.1 on Serial3/0 from FULL to DOWN, Neighbor Down: Adjacency forced to reset

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 172.168.0.1 on Serial3/0 from FULL to DOWN, Neighbor Down: Interface down or detached

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet0/0 from FULL to DOWN, Neighbor Down: Adjacency forced to reset

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet0/0 from FULL to DOWN, Neighbor Down: Interface down or detached

Router#
00:01:55: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on Serial2/0 from LOADING to FULL, Loading Done

00:01:56: %OSPF-5-ADJCHG: Process 1, Nbr 172.168.0.1 on Serial3/0 from LOADING to FULL, Loading Done

Router#
Router#
Router#
Router#
Router#
Router#
00:02:00: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet0/0 from LOADING to FULL, Loading Done

Router#
Router#
Router#sh ip ospf neigh

Neighbor ID Pri State Dead Time Address Interface
192.168.0.1 0 FULL/ - 00:00:36 192.168.0.1 Serial2/0
172.168.0.1 0 FULL/ - 00:00:31 172.168.0.1 Serial3/0
192.168.0.1 1 FULL/DR 00:00:31 20.20.20.1 FastEthernet0/0
Router#

Eildor

alliasneo wrote: »

yeah I have just tried that but still the same:

Router#clear ip ospf ?
process Reset OSPF process
Router#clear ip ospf pro
Reset ALL OSPF processes? [no]: y

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on Serial2/0 from FULL to DOWN, Neighbor Down: Adjacency forced to reset

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on Serial2/0 from FULL to DOWN, Neighbor Down: Interface down or detached

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 172.168.0.1 on Serial3/0 from FULL to DOWN, Neighbor Down: Adjacency forced to reset

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 172.168.0.1 on Serial3/0 from FULL to DOWN, Neighbor Down: Interface down or detached

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet0/0 from FULL to DOWN, Neighbor Down: Adjacency forced to reset

00:01:52: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet0/0 from FULL to DOWN, Neighbor Down: Interface down or detached

Router#
00:01:55: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on Serial2/0 from LOADING to FULL, Loading Done

00:01:56: %OSPF-5-ADJCHG: Process 1, Nbr 172.168.0.1 on Serial3/0 from LOADING to FULL, Loading Done

Router#
Router#
Router#
Router#
Router#
Router#
00:02:00: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet0/0 from LOADING to FULL, Loading Done

Router#
Router#
Router#sh ip ospf neigh

Neighbor ID Pri State Dead Time Address Interface
192.168.0.1 0 FULL/ - 00:00:36 192.168.0.1 Serial2/0
172.168.0.1 0 FULL/ - 00:00:31 172.168.0.1 Serial3/0
192.168.0.1 1 FULL/DR 00:00:31 20.20.20.1 FastEthernet0/0
Router#

edit: Never mind, misunderstood your question.

angel.oa

show ip ospf interface

Eildor

That's strange... did you configure a manual RID?

alliasneo

Eildor wrote: »

That's strange... did you configure a manual RID?

No I don't believe so, here is the sh run on the router I thought was going to be the DR:

Router#sh run
Building configuration...

Current configuration : 904 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
ip address 20.20.20.2 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet1/0
no ip address
duplex auto
speed auto
shutdown
!
interface Serial2/0
ip address 192.168.0.2 255.255.255.0
!
interface Serial3/0
ip address 172.168.0.2 255.255.255.0
!
interface FastEthernet4/0
no ip address
shutdown
!
interface FastEthernet5/0
no ip address
shutdown
!
router ospf 1
log-adjacency-changes
network 192.168.0.0 0.0.0.255 area 30
network 172.168.0.0 0.0.0.255 area 20
network 20.20.20.0 0.0.0.255 area 50
network 1.1.1.1 0.0.0.0 area 50
!
ip classless
!
!
!
no cdp run
!
!
!
!
!
line con 0
line vty 0 4
login
!
!
!
end

and here is the sh ip osp int fa0/0:

Router#sh ip ospf int fa0/0
FastEthernet0/0 is up, line protocol is up
Internet address is 20.20.20.2/24, Area 50
Process ID 1, Router ID 1.1.1.1, Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 1.1.1.1, Interface address 20.20.20.2
No backup designated router on this network
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:05
Index 4/4, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 192.168.0.1
Suppress hello for 0 neighbor(s)
Router#

Something really strange going on now though, I've let packet tracer sit for a while since re-opening it and now on Router 2:

Router#sh ip ospf neigh

Neighbor ID Pri State Dead Time Address Interface
192.168.0.1 0 FULL/ - 00:00:37 192.168.0.1 Serial2/0
172.168.0.1 0 FULL/ - 00:00:30 172.168.0.1 Serial3/0
192.168.0.1 1 FULL/DROTHER 00:00:30 20.20.20.1 FastEthernet0/0
Router#sh ip ospf neigh

Neighbor ID Pri State Dead Time Address Interface
192.168.0.1 0 FULL/ - 00:00:36 192.168.0.1 Serial2/0
172.168.0.1 0 FULL/ - 00:00:39 172.168.0.1 Serial3/0
192.168.0.1 1 FULL/DROTHER 00:00:39 20.20.20.1 FastEthernet0/0
Router#sh ip ospf neigh

Neighbor ID Pri State Dead Time Address Interface
192.168.0.1 0 FULL/ - 00:00:32 192.168.0.1 Serial2/0
172.168.0.1 0 FULL/ - 00:00:35 172.168.0.1 Serial3/0
192.168.0.1 1 FULL/DROTHER 00:00:35 20.20.20.1 FastEthernet0/0
Router#

Eildor

Designated Router (ID) 1.1.1.1, Interface address 20.20.20.2

Isn't that the expected result?

Do a show ip ospf interface on one of the other routers.

fsanyee

try to reload the router.