Inter AS TE tunnel is down

[sachin30720041]

Hello All,

I am trying to configure Inter AS TE tunnel on XRV routers. But inter-as TE tunnel is not coming up.

XRV2 has configured two ospf processes. router ospf 1 and router ospf 2 Both are redistributed in each other.

And I configured a tunnel with explicit path on XRv1. But tunnel status is down. Am I missing any config ?

I can ping from XRv1 to Xrv3.

RP/0/0/CPU0:ios#ping 3.3.3.3 source 1.1.1.1
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 29/31/39 ms

But tunnel-te1 is down.

XRV1: show ip int br
Interface                       IP-Address Status Protocol Vrf-Name
Loopback0                     1.1.1.1       Up        Up           default
tunnel-te1                      1.1.1.1       Down   Down       default

XRv1----------(router ospf 1)----------XRv2---------(router ospf 2)-----------XRv3

XRV1
--------------

explicit-path name path1
index 10 next-address loose 2.2.2.2
index 20 next-address loose 3.3.3.3
exit

int tunnel-te1
ipv4 unnumbered lo0
destination 3.3.3.3
path-option 1 explicit name path1
exit

mpls traffic-eng
int gi0/0/0/1
exit

rsvp
int gi0/0/0/1
bandwidth
exit
exit

int gi0/0/0/1
ipv4 address 100.10.20.1 255.255.255.0
no sh

int lo0
ipv4 address 1.1.1.1 255.255.255.255

router ospf 1
mpls traffic-eng router-id lo0
area 0
mpls traffic-eng
int gi0/0/0/1
int lo0
exit


XRV2
----------------------------

mpls traffic-eng
int gi0/0/0/1
int gi0/0/0/0
exit

rsvp
int gi0/0/0/1
bandwidth
exit

int gi0/0/0/0
bandwidth
exit
exit

int gi0/0/0/1
ipv4 address 100.10.20.2 255.255.255.0
no sh

int gi0/0/0/0
ipv4 address 100.20.30.2 255.255.255.0
no sh

int lo0
ipv4 address 2.2.2.2 255.255.255.255

router ospf 1
mpls traffic-eng router-id lo0
area 0
mpls traffic-eng
redistribute ospf 2
int gi0/0/0/1
int lo0
exit

router ospf 2
redistribute ospf 1
mpls traffic-eng router-id lo0
area 0
mpls traffic-eng
int gi0/0/0/0
exit

XRV3
-----------------
mpls traffic-eng
int gi0/0/0/0
exit

rsvp
int gi0/0/0/0
bandwidth
exit
exit

int gi0/0/0/0
ipv4 address 100.20.30.3 255.255.255.0
no sh

int lo0
ip address 3.3.3.3 255.255.255.255
exit

router ospf 1
mpls traffic-eng router-id lo0
area 0
mpls traffic-eng
int gi0/0/0/0
int lo0
exit

[MHM Cisco World]

I dont 100% sure but I think that Lo 3.3.3.3/2.2.2.2 is not show in RIB of XRv1?

[sachin30720041]

XRv1 can reach 2.2.2.2 and 3.3.3.3.

[MHM Cisco World]

OK, there are two OSPF process OSPF1 and OSPF2 
XRv2 is run both OSPF process and XRv1 should only run OSPF1 and XRv3 should only run OSPF2,
I see XRv3 is also run OSPF1 ?
As I know if the path is not reachable then the MPLS TE is down

[MHM Cisco World]

also

mpls ldp auto-config<- under ospf to run LDP between XRv1-3

[sachin30720041]

ldp is not needed here because rsvp is assigning the labels.

[Harold Ritter · Accepted solution]

Hi @sachin30720041 ,

I just ran a quick test with your configurations and the tunnel comes up. Can you please provide the "sh mpls traffic-eng tunnels name tunnel-te1 detail" output.

Regards,

[sachin30720041]

Thanks Harold!! It came up. I am not sure why it was not coming up yesterday

[MHM Cisco World]

Why Not coming before ?
in MPLS there is BlackHole if the LDP is not Sync and IGP is establish.
So usually we config under IGP LDP SYNC, 
this make IGP not establish before LDP Sync finish.