Packet Tracer OSPF RID
alliasneo
Member Posts: 186
in CCNA & CCENT
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
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
Comments
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Eildor
Member Posts: 444
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
Member Posts: 124
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
While no trees were harmed in the transmission of this message, several electrons were severely inconvenienced :cool: -
alliasneo
Member Posts: 186
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
Member Posts: 444
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
Member Posts: 45 ■■□□□□□□□□
show ip ospf interfaceCurrently reading :study:
Routing TCP/IP, Volume 1 (2nd Edition)
Implementing Cisco IP Routing (ROUTE) Foundation Learning Guide
JNCIA - Junos Study Guide - Parts 1 & 2 -
alliasneo
Member Posts: 186
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
Member Posts: 444
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.
