CRS-8 IOS-XR 4.3.2 not showing up FRR information in "sh mpls traffic-eng fast-reroute database " output

[sree30499]

Hi,

The topology looks like below. The four routers are connected in the below said fashion. Note 186 and 195 are connected. The IGP is ISIS.

              7600 185

                    |

                    |

               CRS-8 80

                    /\

                  /     \

   7600 186----ASR9K 195

I have configured the p2mp tunnel on the router 185(head) tunnel765(185->80->186 and 195). 185 headend router ios ver is 15.3.3.

If the interface Gig 0/3/0/7(connected to 186) on .80(mid) is bought down the traffic is fast rerouted towards backup tunnel 387 (80->195->186). But this is not shown in the output of “sh mpls traffic-eng fast-reroute database”.

Please find the other outputs that show the FRR ready and active highlighted below when the int Gig 0/3/0/7 is up and when it is bought down. Any idea what could be the problem?

If we have a p2p MPLS te tunnel from 185->80->195 instead of p2mp, the CRS shows the FRR information as READY and when the interface is bought down trasitions to ACTIVE state.

RP/0/RP1/CPU0:CRS-2-P2-80#sh mpls traffic-eng tunnels backup	RP/0/RP1/CPU0:CRS-2-P2-80#sh mpls traffic-eng tunnels backup
Tue Feb 25 06:45:08.819 UTC	Tue Feb 25 06:47:22.213 UTC
tunnel-te387	tunnel-te387
Admin: up, Oper: up	Admin: up, Oper: up
Src: 192.168.169.80, Dest: 192.168.169.186, Instance: 2	Src: 192.168.169.80, Dest: 192.168.169.186, Instance: 2
Fast Reroute Backup Provided:	Fast Reroute Backup Provided:
Protected LSPs: 1 (0 active)	Protected LSPs: 1 (1 active)
Protected S2L Sharing Families: 1	Protected S2L Sharing Families: 1
Protected S2Ls: 1	Protected S2Ls: 1
Backup BW: any-class (no limit specified), Inuse: 0 kbps	Backup BW: any-class (no limit specified), Inuse: 0 kbps
Protected i/fs: Gi0/3/0/7	Protected i/fs: Gi0/3/0/7
RP/0/RP1/CPU0:CRS-2-P2-80#	RP/0/RP1/CPU0:CRS-2-P2-80#
RP/0/RP1/CPU0:CRS-2-P2-80#sh mpls traffic-eng tunnels protection frr tunnel-id 765	RP/0/RP1/CPU0:CRS-2-P2-80#sh mpls traffic-eng tunnels protection frr tunnel-id 765
Tue Feb 25 06:46:11.067 UTC	Tue Feb 25 06:48:00.279 UTC
p2mp P2MP S2L Tunnel Id: 765	p2mp P2MP S2L Tunnel Id: 765
Role Midpoint, signaled, connection up	Role Midpoint, signaled, connection up
Src: 192.168.169.185, ExtId: 192.168.169.185, Instance: 486	Src: 192.168.169.185, ExtId: 192.168.169.185, Instance: 486
Dest: 192.168.169.186, P2MP Id: 765, OrigId: 192.168.169.185, SGId: 1	Dest: 192.168.169.186, P2MP Id: 765, OrigId: 192.168.169.185, SGId: 1
Fast Reroute Protection: Requested	Fast Reroute Protection: Requested
Inbound: FRR Inactive	Inbound: FRR Inactive
S2L signalling info:	S2L signalling info:
Original: in i/f: GigabitEthernet0/3/0/9, label:  1048568, phop: 192.168.169.10	Original: in i/f: GigabitEthernet0/3/0/9, label:  1048568, phop: 192.168.169.10
Outbound: FRR Ready	Outbound: FRR Active
Backup tunnel-te387 to S2L nhop	Backup tunnel-te387 to S2L nhop
tunnel-te387: out i/f: GigabitEthernet0/3/0/8, next hop: 192.168.169.2	tunnel-te387: out i/f: GigabitEthernet0/3/0/8, next hop: 192.168.169.2
S2L signalling info:	S2L signalling info:
Original: out i/f: GigabitEthernet0/3/0/7, label:  1007, next hop: 192.168.169.6	Original: out i/f: GigabitEthernet0/3/0/7, label:  1007, next hop: 192.168.169.6
With FRR: out i/f: tunnel-te387, label:  1007	With FRR: out i/f: tunnel-te387, label:  1007
Sub-LSP bw: 0 kbps, Backup level: any-class unlimited, type: CT0	Sub-LSP bw: 0 kbps, Backup level: any-class unlimited, type: CT0
p2mp P2MP S2L Tunnel Id: 765	p2mp P2MP S2L Tunnel Id: 765
Role Midpoint, signaled, connection up	Role Midpoint, signaled, connection up
Src: 192.168.169.185, ExtId: 192.168.169.185, Instance: 486	Src: 192.168.169.185, ExtId: 192.168.169.185, Instance: 486
Dest: 192.168.169.195, P2MP Id: 765, OrigId: 192.168.169.185, SGId: 2	Dest: 192.168.169.195, P2MP Id: 765, OrigId: 192.168.169.185, SGId: 2
Fast Reroute Protection: Requested	Fast Reroute Protection: Requested
Inbound: FRR Inactive	Inbound: FRR Inactive
S2L signalling info:	S2L signalling info:
Original: in i/f: GigabitEthernet0/3/0/9, label:  1048568, phop: 192.168.169.10	Original: in i/f: GigabitEthernet0/3/0/9, label:  1048568, phop: 192.168.169.10
Outbound: FRR Inactive	Outbound: FRR Inactive
S2L signalling info:	S2L signalling info:
Original: out i/f: GigabitEthernet0/3/0/8, label:  160009, next hop: 192.168.169.2	Original: out i/f: GigabitEthernet0/3/0/8, label:  160009, next hop: 192.168.169.2

[sree30499]

finally found the answer......"show mpls traffic-eng fast-reroute database displays only P2P FRR state. For P2MP tunnels, use show mrib mpls traffic-eng fast-reroute database"