MPLS neighbors not forming

[Harry_Coetzee]

Strange this one.
I have configured 3 router to do some mpls. ANd ospf as the routing protocol. The all 3 have formed Ospf adjacencies and can ping each other. MPLS ip is turn on, on all the interfaces that needs to be. But I have forced the mpls router id to the loopback /32. But still no neighbors have formed

[Harry_Coetzee]

SP1 Config file
SP1#terminal length 0
SP1#sh run
Building configuration...

Current configuration : 1184 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SP1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef

!
interface Loopback0
ip address 10.0.1.1 255.255.255.255
!
interface FastEthernet0/0
ip address 172.16.100.254 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet1/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial2/0
mtu 1512
ip address 10.0.12.1 255.255.255.0
ip ospf 1 area 0
mpls ip
serial restart-delay 0
!
interface Serial2/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial2/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial2/3
no ip address
shutdown
serial restart-delay 0
!
router ospf 1
log-adjacency-changes
network 10.0.0.0 0.0.0.255 area 0
!
ip http server
no ip http secure-server
ip forward-protocol nd
!
!
!
!
!
mpls ldp router-id Loopback0 force
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
login
!
!
end
SP2 config file

SP2#sh run
Building configuration...

Current configuration : 1234 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SP2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
!

interface Loopback0
ip address 10.0.2.1 255.255.255.255
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet1/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial2/0
mtu 1512
ip address 10.0.12.2 255.255.255.0
ip ospf 1 area 0
mpls ip
serial restart-delay 0
!
interface Serial2/1
mtu 1512
ip address 10.0.23.2 255.255.255.0
ip ospf 1 area 0
mpls ip
serial restart-delay 0
clock rate 64000
!
interface Serial2/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial2/3
no ip address
shutdown
serial restart-delay 0
!
router ospf 1
log-adjacency-changes
network 10.0.0.0 0.0.0.255 area 0
!
ip http server
no ip http secure-server
ip forward-protocol nd
!
!
!
!
!
mpls ldp router-id Loopback0 force
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
login
!
!
end

SP3 config file

SP3#sh run
Building configuration...

Current configuration : 1202 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SP3
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef

interface Loopback0
ip address 10.0.3.1 255.255.255.255
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet1/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial2/0
ip address 172.16.200.254 255.255.255.0
serial restart-delay 0
!
interface Serial2/1
mtu 1512
ip address 10.0.23.1 255.255.255.0
ip ospf 1 area 0
mpls ip
serial restart-delay 0
clock rate 64000
!
interface Serial2/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial2/3
no ip address
shutdown
serial restart-delay 0
!
router ospf 1
log-adjacency-changes
network 10.0.0.0 0.0.0.255 area 0
!
ip http server
no ip http secure-server
ip forward-protocol nd
!
!
!
!
!
mpls ldp router-id Loopback0 force
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
login
!
!
end

[SJuggins]

Harry,

You need to check the following things :-

Can ALL routers contact the loopbacks of the neighbouring routers? From your configs I would say no. They need to be able to ping the loopbacks in order to form.

If they cannot contact the loopbacks, they cannot form neighbour adjacencies.

Your MTU must match on all MPLS interfaces and should be OK set to 1512.

Post up an output of "sh mpls ldp neigh"

[Harry_Coetzee]

Yes the routers couldn't ping the other routers loop o becuase the ser + loop had to be configured ip ospf 1 area 0 that way the formed OSFP neighbours and MPLS. The lab book didn't have that part in it. I only configured the ser int for OSPF .

H

[SJuggins]

Great, good to hear it's working now