02-05-2012 06:44 PM - edited 03-04-2019 03:09 PM
Hi,
I have configured the OSPF on my branch office to head office, but It's work on one branch and not working on another branch. There is no any difference in configuration except the IP address in the working and non working branches.
The ospf functioning router shows all the data when the following command given
show ip ospf database
show ip ospf neigh
show ip route ospf
The ospf not functioning router doesn't show anything when show ip route ospf issued, but it shows the data of ospf database and ospf nieghbour. What may be the problem. Please help
Regards,
Mero
Solved! Go to Solution.
02-05-2012 10:39 PM
Please provide the configuration + topology setup. Without this there is no way to say what problem you may be having.
Thanks
Vivek
02-05-2012 06:58 PM
Hi,
Please post the config from both routers.
02-05-2012 08:18 PM
Hi Mero,
Please provide the output of the commands Executed by you ie:
show ip ospf database
show ip ospf neigh
show ip route ospf
Please ensure that there is no MTU Mismatch between the Routers.
You may also want to check if OSPF is configured as Point To Multi point if you are working in a NBMA type of network.
Regards
Sreenath
02-05-2012 10:04 PM
Make sure you have a right network type configured on your branch router. There are many other reasons why you could have seen routes in database but not in routing table. Please provide the outputs as requested by Reza.
Thanks
Vivek
02-05-2012 10:36 PM
Hi,
In the morning I tried for 2 hours, it doesn't work. But now it's working, no any changes have been done. What may be the problem ?
Regards,
Mero
02-05-2012 10:39 PM
Please provide the configuration + topology setup. Without this there is no way to say what problem you may be having.
Thanks
Vivek
02-06-2012 08:48 AM
Dear Vivek,
I have a mesh topology network. Please go through the following informations.
ne
ROUTER A#sh ip int brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.10.245.26 YES NVRAM up up
FastEthernet0/1 10.10.26.1 YES NVRAM up up
Loopback0 10.10.25.26 YES NVRAM up up
Router A#sh run
interface Loopback0
ip address 10.10.25.26 255.255.255.255
!
interface FastEthernet0/0
description ***** CONNECTED TO WAN 1 *****
ip address 10.10.245.26 255.255.255.0
ip ospf message-digest-key 1 md5 7 XXXXXXXX
duplex auto
speed auto
!
interface FastEthernet0/1
description ***** CONNECTED TO WAN 2 + LAN *****
ip address 10.10.246.26 255.255.255.0 secondary (WAN 2 IP ADDRESS)
ip address 10.10.26.1 255.255.255.0 (LAN IP ADDRESS)
ip ospf message-digest-key 1 md5 XXXXXXXXX
duplex auto
speed auto
router ospf 1
log-adjacency-changes
area 1 authentication message-digest
network 10.10.26.1 0.0.0.0 area 1
network 10.10.245.26 0.0.0.0 area 0
network 10.10.246.26 0.0.0.0 area 1
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.10.246.1 230
ip route 0.0.0.0 0.0.0.0 10.10.245.1 240
!
Router A#show ip ospf data
OSPF Router with ID (10.10.25.26) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
10.10.25.24 10.10.25.24 592 0x80000045 0x00941B 1
10.10.25.26 10.10.25.26 583 0x80000010 0x00588F 1
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
10.10.245.24 10.10.25.24 592 0x80000003 0x00E813
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
10.10.24.0 10.10.25.24 1870 0x8000003A 0x0092CB
10.10.25.0 10.10.25.24 345 0x8000000F 0x006ADC
10.10.26.0 10.10.25.26 583 0x80000007 0x00D6B6
10.10.27.0 10.10.25.24 1870 0x8000003C 0x00F91E
10.10.28.0 10.10.25.24 1870 0x8000003C 0x00EE28
10.10.32.0 10.10.25.24 345 0x8000000D 0x002121
10.10.246.0 10.10.25.24 5 0x80001BF5 0x003672
10.10.246.0 10.10.25.26 583 0x80000007 0x005957
10.10.248.0 10.10.25.24 1874 0x8000003C 0x00EBBD
10.10.25.24 10.10.25.24 1874 0x8000003A 0x00E181
10.10.25.25 10.10.25.24 349 0x8000000F 0x00BA91
10.10.25.26 10.10.25.26 587 0x80000009 0x00246C
10.10.25.27 10.10.25.24 1874 0x8000003C 0x004CD0
10.10.25.28 10.10.25.24 1874 0x8000003C 0x0042D9
10.10.25.29 10.10.25.24 1874 0x8000003C 0x0038E2
10.10.25.32 10.10.25.24 349 0x8000000D 0x0078CE
10.10.252.76 10.10.25.24 1874 0x8000003A 0x0028C8
10.10.252.220 10.10.25.24 9 0x80000001 0x0092F6
Router Link States (Area 1)
Link ID ADV Router Age Seq# Checksum Link count
10.10.25.26 10.10.25.26 587 0x80000003 0x00ED1F 3
Summary Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
10.10.24.0 10.10.25.26 587 0x80000003 0x00FE93
10.10.25.0 10.10.25.26 587 0x80000003 0x0080CF
10.10.27.0 10.10.25.26 587 0x80000003 0x006AE3
10.10.28.0 10.10.25.26 587 0x80000003 0x00er 5FED
10.10.32.0 10.10.25.26 587 0x80000003 0x003316
10.10.245.0 10.10.25.26 587 0x80000005 0x00684B
10.10.25.24 10.10.25.26 587 0x80000003 0x004E49
10.10.25.25 10.10.25.26 587 0x80000003 0x00D084
10.10.25.27 10.10.25.26 587 0x80000003 0x00BC96
10.10.25.28 10.10.25.26 587 0x80000003 0x00B29F
10.10.25.29 10.10.25.26 587 0x80000003 0x00A8A8
10.10.25.32 10.10.25.26 587 0x80000003 0x008AC3
10.10.252.76 10.10.25.26 587 0x80000003 0x009490
10.10.252.220 10.10.25.26 9 0x80000001 0x0090F5
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
0.0.0.0 10.10.25.251 642 0x800005A3 0x00246C 1
0.0.0.0 10.10.25.253 287 0x8000093B 0x000ACA 1
Router A# show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
10.10.25.24 10 FULL/DR 00:00:37 10.10.245.24 FastEthernet0/0
The show ip ospf router does not show anything. The same kind of configuration works in another router, but over here it is not working. What may be the problem. There are lots of neighbor over this network, but can't see other network in show neighbour command, why ?
What are the commands for troubleshooting ospf ?
Regards,
Mero
02-06-2012 08:03 PM
frankly speaking, with the above information i haven't been able to understand your setup. Is it possible for you to provide me a topology / diagram? Diagrams will help us to solve your problem much easily.
The config which you provide is it of your head office or of your branch?
Thanks
Vivek
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