Topology
Figure 10-12: TI-LFA FRR path using Adjacent P and Q Nodes
TI-LFA FRR Path using Adjacent P and Q nodes with OSPF-SR
P4
P4#configure terminal | Enter configure mode. |
P4(config)#interface eth2 | Enter interface mode. |
P4(config-if)# ip ospf cost 1000 | Configure the OSPF cost of the interface |
P4(config-if)#exit | Exit interface mode. |
P4(config)#exit | Exit configure mode |
P4(config)#commit | Commit the candidate configuration to the running configuration. |
P3
P3#configure terminal | Enter configure mode. |
P3(config)#interface eth2 | Enter interface mode. |
P3(config-if)# ip ospf cost 1000 | Configure the OSPF cost of the interface |
P3(config-if)#exit | Exit interface mode. |
P3(config)#exit | Exit configure mode |
P3(config)#commit | Commit the candidate configuration to the running configuration. |
Validation
P1
P1#show ip ospf tilfa-backup-path
OSPF process 100:
Route [1.1.1.1]
NO PQ node
Route [1.1.1.2]
Route [1.1.1.3]
P-node: 1.1.1.5 Q-node: 1.1.1.4
Route [1.1.1.4]
P-node: 1.1.1.5 Q-node: 1.1.1.4
Route [1.1.1.5]
P-node: 1.1.1.4 Q-node: 1.1.1.5
Route [1.1.1.6]
P-node: 1.1.1.4 Q-node: 1.1.1.5
Route [1.1.1.7]
P-node: 1.1.1.5 Q-node: 1.1.1.4
Route [10.1.2.0]
Route [10.2.3.0]
Route [10.2.6.0]
Route [10.3.4.0]
Route [10.3.7.0]
Route [10.4.5.0]
Route [10.5.6.0]
Neighbor [1.1.1.1]
Neighbor [1.1.1.3]
P-node: 1.1.1.5 Q-node: 1.1.1.4
Neighbor [1.1.1.6]
P-node: 1.1.1.4 Q-node: 1.1.1.5
Displaying vertex-info in tilfa_network table
Vertex [1.1.1.1]
P node: 1.1.1.4 dist: 2
P node: 1.1.1.7 dist: 2
P node: 1.1.1.3 dist: 1
P node: 1.1.1.5 dist: 2
P node: 1.1.1.6 dist: 1
Vertex [1.1.1.2]
No P Nodes
No Q Nodes
Vertex [1.1.1.3]
P node: 1.1.1.1 dist: 1
P node: 1.1.1.5 dist: 2
P node: 1.1.1.6 dist: 1
Q node: 1.1.1.4 dist: 2
Q node: 1.1.1.7 dist: 2
P-node: 1.1.1.5 Q-node: 1.1.1.4
Backup out-interface: eth3
Vertex [1.1.1.4]
P node: 1.1.1.1 dist: 1
P node: 1.1.1.5 dist: 2
P node: 1.1.1.6 dist: 1
Q node: 1.1.1.4 dist: 2
Q node: 1.1.1.7 dist: 2
P-node: 1.1.1.5 Q-node: 1.1.1.4
Backup out-interface: eth3
Vertex [1.1.1.5]
P node: 1.1.1.1 dist: 1
P node: 1.1.1.4 dist: 2
P node: 1.1.1.7 dist: 2
P node: 1.1.1.3 dist: 1
Q node: 1.1.1.5 dist: 2
P-node: 1.1.1.4 Q-node: 1.1.1.5
Backup out-interface: eth2
Vertex [1.1.1.6]
P node: 1.1.1.1 dist: 1
P node: 1.1.1.4 dist: 2
P node: 1.1.1.7 dist: 2
P node: 1.1.1.3 dist: 1
Q node: 1.1.1.5 dist: 2
P-node: 1.1.1.4 Q-node: 1.1.1.5
Backup out-interface: eth2
Vertex [1.1.1.7]
P node: 1.1.1.1 dist: 1
P node: 1.1.1.5 dist: 2
P node: 1.1.1.6 dist: 1
Q node: 1.1.1.4 dist: 2
Q node: 1.1.1.7 dist: 2
P-node: 1.1.1.5 Q-node: 1.1.1.4
Backup out-interface: eth3
P1# P1#show ip ospf tilfa-repair-list
1.1.1.1/32
Primary Path Metric :2
Primary Path Nexthop : 10.1.2.1, eth1
Route ftnix:1 ilmix:1
SR Incoming Label : 16001
SR outgoing Label : 3
NO PQ node
1.1.1.2/32
1.1.1.3/32
Primary Path Metric :2
Primary Path Nexthop : 10.2.3.2, eth2
Route ftnix:2 ilmix:4
SR Incoming Label : 16003
SR outgoing Label : 3
P-node: 1.1.1.5 Q-node: 1.1.1.4
Backup ftnix:8 ilmix:33
Backup outgoing Label : 16003
Bypass_trunk id :101
Backup out interface: eth3
1.1.1.4/32
Primary Path Metric :3
Primary Path Nexthop : 10.2.3.2, eth2
Route ftnix:3 ilmix:5
SR Incoming Label : 16004
SR outgoing Label : 16004
P-node: 1.1.1.5 Q-node: 1.1.1.4
Backup ftnix:9 ilmix:34
Backup outgoing Label : 16004
Bypass_trunk id :101
Backup out interface: eth3
Bypass-Trunk: 102 Name: 1.1.1.4_1.1.1.5_nexthop__10006 ftn_ix:7
ftn_info->trunk_ftn_ix : 7
Number Of outgoing label 2:
16004
24321
Nexthop address: 10.2.3.2
1.1.1.5/32
Primary Path Metric :3
Primary Path Nexthop : 10.2.6.2, eth3
Route ftnix:4 ilmix:6
SR Incoming Label : 16005
SR outgoing Label : 16005
P-node: 1.1.1.4 Q-node: 1.1.1.5
Backup ftnix:10 ilmix:35
Backup outgoing Label : 16005
Bypass_trunk id :102
Backup out interface: eth2
Bypass-Trunk: 101 Name: 1.1.1.5_1.1.1.4_nexthop__10007 ftn_ix:6
ftn_info->trunk_ftn_ix : 6
Number Of outgoing label 2:
16005
24320
Nexthop address: 10.2.6.2
1.1.1.6/32
Primary Path Metric :2
Primary Path Nexthop : 10.2.6.2, eth3
Route ftnix:5 ilmix:8
SR Incoming Label : 16006
SR outgoing Label : 3
P-node: 1.1.1.4 Q-node: 1.1.1.5
Backup ftnix:11 ilmix:36
Backup outgoing Label : 16006
Bypass_trunk id :102
Backup out interface: eth2
1.1.1.7/32
Primary Path Metric :3
Primary Path Nexthop : 10.2.3.2, eth2
Route ftnix:12 ilmix:15
SR Incoming Label : 16007
SR outgoing Label : 16007
P-node: 1.1.1.5 Q-node: 1.1.1.4
Backup ftnix:14 ilmix:37
Backup outgoing Label : 16007
Bypass_trunk id :101
Backup out interface: eth3
10.1.2.0/24
10.2.3.0/24
10.2.6.0/24
10.3.4.0/24
10.3.7.0/24
10.4.5.0/24
10.5.6.0/24
P1#
P1#show mpls ilm-table
Codes: > - installed ILM, * - selected ILM, p - stale ILM
K - CLI ILM, T - MPLS-TP, s - Stitched ILM
S - SNMP, L - LDP, R - RSVP, C - CRLDP
B - BGP , K - CLI , V - LDP_VC, I - IGP_SHORTCUT
O - OSPF/OSPF6 SR, i - ISIS SR, k - SR CLI
P - SR Policy, U - unknown
Code FEC/VRF/L2CKT ILM-ID In-Label Out-Label In-Intf Out-Intf/VRF Nexthop LSP-Type
O> 1.1.1.6/32 8 16006 3 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 1.1.1.6/32 36 16006 16006 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 1.1.1.4/32 5 16004 16004 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 1.1.1.4/32 34 16004 16004 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 1.1.1.3/32 4 16003 3 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 1.1.1.3/32 33 16003 16003 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 1.1.1.1/32 1 16001 3 N/A eth1 10.1.2.1 LSP_DEFAULT
O> 1.1.1.5/32 6 16005 16005 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 1.1.1.5/32 35 16005 16005 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 10.1.2.1/32 2 24320 3 N/A eth1 10.1.2.1 LSP_DEFAULT
O> 1.1.1.7/32 15 16007 16007 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 1.1.1.7/32 37 16007 16007 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 10.2.3.2/32 3 24321 3 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 10.2.3.2/32 38 24321 16003 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 10.2.6.2/32 7 24322 3 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 10.2.6.2/32 39 24322 16006 N/A eth2 10.2.3.2 LSP_DEFAULT
P1#
P1#show mpls ilm-table
Codes: > - installed ILM, * - selected ILM, p - stale ILM
K - CLI ILM, T - MPLS-TP, s - Stitched ILM
S - SNMP, L - LDP, R - RSVP, C - CRLDP
B - BGP , K - CLI , V - LDP_VC, I - IGP_SHORTCUT
O - OSPF/OSPF6 SR, i - ISIS SR, k - SR CLI
P - SR Policy, U - unknown
Code FEC/VRF/L2CKT ILM-ID In-Label Out-Label In-Intf Out-Intf/VRF Nexthop LSP-Type
O> 10.1.2.1/32 2 24320 3 N/A eth1 10.1.2.1 LSP_DEFAULT
O> 1.1.1.4/32 8 16004 16004 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 1.1.1.4/32 60 16004 16004 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 1.1.1.3/32 3 16003 3 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 1.1.1.3/32 59 16003 16003 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 1.1.1.1/32 1 16001 3 N/A eth1 10.1.2.1 LSP_DEFAULT
O> 1.1.1.6/32 4 16006 3 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 1.1.1.6/32 62 16006 16006 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 1.1.1.5/32 15 16005 16005 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 1.1.1.5/32 61 16005 16005 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 1.1.1.7/32 7 16007 16007 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 1.1.1.7/32 63 16007 16007 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 10.2.3.2/32 5 24321 3 N/A eth2 10.2.3.2 LSP_DEFAULT
O> 10.2.3.2/32 64 24321 16003 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 10.2.6.2/32 6 24322 3 N/A eth3 10.2.6.2 LSP_DEFAULT
O> 10.2.6.2/32 65 24322 16006 N/A eth2 10.2.3.2 LSP_DEFAULT
P#
P1#show mpls forwarding-table
Codes: > - installed FTN, * - selected FTN, p - stale FTN,
B - BGP FTN, K - CLI FTN, t - tunnel, P - SR Policy FTN,
L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN, I - IGP-Shortcut,
U - unknown FTN, O - SR-OSPF FTN, i - SR-ISIS FTN, k - SR-CLI FTN
Code FEC FTN-ID Nhlfe-ID Tunnel-id Pri LSP-Type Out-Label Out-Intf ELC Nexthop
O> 1.1.1.1/32 1 2 0 Yes LSP_DEFAULT 3 eth1 No 10.1.2.1
O> 1.1.1.3/32 2 4 0 Yes LSP_DEFAULT 3 eth2 No 10.2.3.2
O> 1.1.1.3/32 8 13 0 No LSP_DEFAULT 16003 - No 10.2.6.2
O> 1.1.1.4/32 3 6 0 Yes LSP_DEFAULT 16004 eth2 No 10.2.3.2
O> 1.1.1.4/32 9 15 0 No LSP_DEFAULT 16004 - No 10.2.6.2
O> 1.1.1.4/32 7 11 102 Yes LSP_DEFAULT 16004 eth2 No 10.2.3.2
O> 1.1.1.5/32 4 8 0 Yes LSP_DEFAULT 16005 eth3 No 10.2.6.2
O> 1.1.1.5/32 10 18 0 No LSP_DEFAULT 16005 - No 10.2.3.2
O> 1.1.1.5/32 6 7 101 Yes LSP_DEFAULT 16005 - No 10.2.6.2
O> 1.1.1.6/32 5 10 0 Yes LSP_DEFAULT 3 eth3 No 10.2.6.2
O> 1.1.1.6/32 11 20 0 No LSP_DEFAULT 16006 - No 10.2.3.2
O> 1.1.1.7/32 12 22 0 Yes LSP_DEFAULT 16007 eth2 No 10.2.3.2
O> 1.1.1.7/32 14 24 0 No LSP_DEFAULT 16007 - No 10.2.6.2
K> 202.1.1.0/24 13 - - - LSP_DEFAULT - eth2 No 1.1.1.7
P1#
P1#show mpls ftn-table 1.1.1.5/32
Primary FTN entry with FEC: 1.1.1.5/32, id: 4, row status: Active, Tunnel-Policy: N/A
Owner: OSPF-SR, distance: 110, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 7, in intf: - in label: 0 out-segment ix: 16
Owner: OSPF-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 16, owner: OSPF-SR, Stale: NO, OSPF-SR out intf: eth3, transport out intf: N/A, out label: 16005
Nexthop addr: 10.2.6.2 cross connect ix: 7, op code: Push and Lookup
Non-primary FTN entry with FEC: 1.1.1.5/32, id: 10, row status: Active, Tunnel-Policy: N/A
Owner: OSPF-SR, distance: 110, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 8, in intf: - in label: 0 out-segment ix: 17
Owner: OSPF-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 17, owner: OSPF-SR, Stale: NO, OSPF-SR out intf: eth2, transport out intf: N/A, out label: 16005
Nexthop addr: 10.2.3.2 cross connect ix: 8, op code: Push and Lookup
bypass_ftn_ix 7
Primary FTN entry with FEC: 1.1.1.5/32, id: 6, row status: Active, Tunnel-Policy: N/A
Owner: OSPF-SR, distance: 110, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 101, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 7, in intf: - in label: 0 out-segment ix: 16
Owner: OSPF-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 16, owner: OSPF-SR, Stale: NO, OSPF-SR out intf: eth3, transport out intf: N/A, out label: 16005\24320
Nexthop addr: 10.2.6.2 cross connect ix: 7, op code: Push and Lookup
P1#
P1#show mpls ftn-table 1.1.1.4/32
Primary FTN entry with FEC: 1.1.1.4/32, id: 3, row status: Active, Tunnel-Policy: N/A
Owner: OSPF-SR, distance: 110, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 3, in intf: - in label: 0 out-segment ix: 5
Owner: OSPF-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 5, owner: OSPF-SR, Stale: NO, out intf: eth2, out label: 16004
Nexthop addr: 10.2.3.2 cross connect ix: 3, op code: Push
Non-primary FTN entry with FEC: 1.1.1.4/32, id: 9, row status: Active, Tunnel-Policy: N/A
Owner: OSPF-SR, distance: 110, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 6, in intf: - in label: 0 out-segment ix: 14
Owner: OSPF-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 14, owner: OSPF-SR, Stale: NO, OSPF-SR out intf: eth3, transport out intf: N/A, out label: 16004
Nexthop addr: 10.2.6.2 cross connect ix: 6, op code: Push and Lookup
bypass_ftn_ix 6
Primary FTN entry with FEC: 1.1.1.4/32, id: 7, row status: Active, Tunnel-Policy: N/A
Owner: OSPF-SR, distance: 110, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 102, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 3, in intf: - in label: 0 out-segment ix: 5
Owner: OSPF-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 5, owner: OSPF-SR, Stale: NO, out intf: eth2, out label: 16004\24321
Nexthop addr: 10.2.3.2 cross connect ix: 3, op code: Push
P1#
P1#show mpls ftn-table 1.1.1.7/32
Primary FTN entry with FEC: 1.1.1.7/32, id: 12, row status: Active, Tunnel-Policy: N/A
Owner: OSPF-SR, distance: 110, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 10, in intf: - in label: 0 out-segment ix: 21
Owner: OSPF-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 21, owner: OSPF-SR, Stale: NO, out intf: eth2, out label: 16007
Nexthop addr: 10.2.3.2 cross connect ix: 10, op code: Push
Non-primary FTN entry with FEC: 1.1.1.7/32, id: 14, row status: Active, Tunnel-Policy: N/A
Owner: OSPF-SR, distance: 110, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 11, in intf: - in label: 0 out-segment ix: 23
Owner: OSPF-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 23, owner: OSPF-SR, Stale: NO, OSPF-SR out intf: eth3, transport out intf: N/A, out label: 16007
Nexthop addr: 10.2.6.2 cross connect ix: 11, op code: Push and Lookup
bypass_ftn_ix 6
P1#
TI-LFA FRR Path using Adjacent P and Q nodes with ISIS-SR
P4
P4#configure terminal | Enter configure mode. |
P4(config)#interface eth2 | Enter interface mode. |
P4(config-if)#isis wide-metric 1000 | Configure the ISIS wide-metric for the interface |
P4(config-if)#exit | Exit interface mode. |
P4(config)#exit | Exit configure mode |
P4(config)#commit | Commit the candidate configuration to the running configuration. |
P3
P3#configure terminal | Enter configure mode. |
P3(config)#interface eth2 | Enter interface mode. |
P3(config-if)#isis wide-metric 1000 | Configure the ISIS wide-metric for the interface |
P3(config-if)#exit | Exit interface mode. |
P3(config)#exit | Exit configure mode |
P3(config)#commit | Commit the candidate configuration to the running configuration. |
Validation
P1
P1#show isis tilfa pq
IS-IS Level-1 Link State Database:
Node: 0000.0000.0001.00-00
P node: 0000.0000.0004.00-00 primary dist:20
P node: 0000.0000.0007.00-00 primary dist:20
P node: 0000.0000.0003.00-00 primary dist:10
P node: 0000.0000.0005.00-00 primary dist:20
P node: 0000.0000.0006.00-00 primary dist:10
No PQ Node found on backup path
Node: 0000.0000.0003.00-00
P node: 0000.0000.0005.00-00 primary dist:20
P node: 0000.0000.0006.00-00 primary dist:10
P node: 0000.0000.0001.00-00 primary dist:10
Q node: 0000.0000.0004.00-00 primary dist:20
Q node: 0000.0000.0007.00-00 primary dist:20
P-Node: 0000.0000.0005.00-00 backup dist:20
Q-Node: 0000.0000.0004.00-00 backup dist:1020
Node: 0000.0000.0004.00-00
P node: 0000.0000.0005.00-00 primary dist:20
P node: 0000.0000.0006.00-00 primary dist:10
P node: 0000.0000.0001.00-00 primary dist:10
Q node: 0000.0000.0004.00-00 primary dist:20
Q node: 0000.0000.0007.00-00 primary dist:20
P-Node: 0000.0000.0005.00-00 backup dist:20
Q-Node: 0000.0000.0004.00-00 backup dist:1020
Node: 0000.0000.0005.00-00
P node: 0000.0000.0004.00-00 primary dist:20
P node: 0000.0000.0007.00-00 primary dist:20
P node: 0000.0000.0003.00-00 primary dist:10
P node: 0000.0000.0001.00-00 primary dist:10
Q node: 0000.0000.0005.00-00 primary dist:20
P-Node: 0000.0000.0004.00-00 backup dist:20
Q-Node: 0000.0000.0005.00-00 backup dist:1020
Node: 0000.0000.0006.00-00
P node: 0000.0000.0004.00-00 primary dist:20
P node: 0000.0000.0007.00-00 primary dist:20
P node: 0000.0000.0003.00-00 primary dist:10
P node: 0000.0000.0001.00-00 primary dist:10
Q node: 0000.0000.0005.00-00 primary dist:20
P-Node: 0000.0000.0004.00-00 backup dist:20
Q-Node: 0000.0000.0005.00-00 backup dist:1020
Node: 0000.0000.0007.00-00
P node: 0000.0000.0005.00-00 primary dist:20
P node: 0000.0000.0006.00-00 primary dist:10
P node: 0000.0000.0001.00-00 primary dist:10
Q node: 0000.0000.0004.00-00 primary dist:20
Q node: 0000.0000.0007.00-00 primary dist:20
P-Node: 0000.0000.0005.00-00 backup dist:20
Q-Node: 0000.0000.0004.00-00 backup dist:1020
P1#
P1#show ip isis route tilfa
Tag : 1 VRF : default
Codes : L1 - IS-IS level-1, L2 - IS-IS level-2,
C - Connected Routes, ia - IS-IS inter area
1.1.1.1/32
L1: Primary Path Nexthop : 10.1.2.1, eth1
Route ftnix :1 ilmix :5
SR Incoming Label : 16001
SR outgoing Label : 3
NO PQ node
NO Backup
1.1.1.2/32
C: Primary Path Nexthop : 0.0.0.0, lo
Route ftnix :0 ilmix :1
SR Incoming Label : 16002
No SR outgoing Label
NO PQ node
NO Backup
1.1.1.3/32
L1: Primary Path Nexthop : 10.2.3.2, eth2
Route ftnix :2 ilmix :6
SR Incoming Label : 16003
SR outgoing Label : 3
P node : 1.1.1.5
Q node : 1.1.1.4
Backup ftnix :10 ilmix :47
Backup outgoing Label : 16003
Bypass_trunk id :2203
Backup out interface : eth3
1.1.1.4/32
L1: Primary Path Nexthop : 10.2.3.2, eth2
Route ftnix :3 ilmix :7
SR Incoming Label : 16004
SR outgoing Label : 16004
P node : 1.1.1.5
Q node : 1.1.1.4
Backup ftnix :11 ilmix :48
Backup outgoing Label : 16004
Bypass_trunk id :2203
Backup out interface : eth3
Trunk : 2204 :1.1.1.4_1.1.1.5_nh_10006 ftn_ix : 16 ref_cnt:3
Number Of outgoing label : 2
16004
24960
Nexthop address : 10.2.3.2
1.1.1.5/32
L1: Primary Path Nexthop : 10.2.6.2, eth3
Route ftnix :4 ilmix :8
SR Incoming Label : 16005
SR outgoing Label : 16005
P node : 1.1.1.4
Q node : 1.1.1.5
Backup ftnix :12 ilmix :49
Backup outgoing Label : 16005
Bypass_trunk id :2204
Backup out interface : eth2
Trunk : 2203 :1.1.1.5_1.1.1.4_nh_10007 ftn_ix : 15 ref_cnt:4
Number Of outgoing label : 2
16005
24961
Nexthop address : 10.2.6.2
1.1.1.6/32
L1: Primary Path Nexthop : 10.2.6.2, eth3
Route ftnix :5 ilmix :15
SR Incoming Label : 16006
SR outgoing Label : 3
P node : 1.1.1.4
Q node : 1.1.1.5
Backup ftnix :13 ilmix :50
Backup outgoing Label : 16006
Bypass_trunk id :2204
Backup out interface : eth2
1.1.1.7/32
L1: Primary Path Nexthop : 10.2.3.2, eth2
Route ftnix :6 ilmix :40
SR Incoming Label : 16007
SR outgoing Label : 16007
P node : 1.1.1.5
Q node : 1.1.1.4
Backup ftnix :14 ilmix :53
Backup outgoing Label : 16007
Bypass_trunk id :2203
Backup out interface : eth3
P1#
P1# show mpls ilm-table
Codes: > - installed ILM, * - selected ILM, p - stale ILM
K - CLI ILM, T - MPLS-TP, s - Stitched ILM
S - SNMP, L - LDP, R - RSVP, C - CRLDP
B - BGP , K - CLI , V - LDP_VC, I - IGP_SHORTCUT
O - OSPF/OSPF6 SR, i - ISIS SR, k - SR CLI
P - SR Policy, U - unknown
Code FEC/VRF/L2CKT ILM-ID In-Label Out-Label In-Intf Out-Intf/VRF Nexthop LSP-Type
i> 10.1.2.1/32 2 24960 3 N/A eth1 10.1.2.1 LSP_DEFAULT
i> 1.1.1.4/32 7 16004 16004 N/A eth2 10.2.3.2 LSP_DEFAULT
i> 1.1.1.4/32 48 16004 16004 N/A eth3 10.2.6.2 LSP_DEFAULT
i> 1.1.1.2/32 1 16002 Nolabel N/A N/A 127.0.0.1 LSP_DEFAULT
i> 1.1.1.1/32 5 16001 3 N/A eth1 10.1.2.1 LSP_DEFAULT
i> 1.1.1.3/32 6 16003 3 N/A eth2 10.2.3.2 LSP_DEFAULT
i> 1.1.1.3/32 47 16003 16003 N/A eth3 10.2.6.2 LSP_DEFAULT
i> 1.1.1.6/32 15 16006 3 N/A eth3 10.2.6.2 LSP_DEFAULT
i> 1.1.1.6/32 50 16006 16006 N/A eth2 10.2.3.2 LSP_DEFAULT
i> 1.1.1.5/32 8 16005 16005 N/A eth3 10.2.6.2 LSP_DEFAULT
i> 1.1.1.5/32 49 16005 16005 N/A eth2 10.2.3.2 LSP_DEFAULT
i> 1.1.1.7/32 40 16007 16007 N/A eth2 10.2.3.2 LSP_DEFAULT
i> 1.1.1.7/32 53 16007 16007 N/A eth3 10.2.6.2 LSP_DEFAULT
i> 10.2.3.2/32 3 24961 3 N/A eth2 10.2.3.2 LSP_DEFAULT
i> 10.2.3.2/32 60 24961 16003 N/A eth3 10.2.6.2 LSP_DEFAULT
i> 10.2.6.2/32 4 24962 3 N/A eth3 10.2.6.2 LSP_DEFAULT
i> 10.2.6.2/32 61 24962 16006 N/A eth2 10.2.3.2 LSP_DEFAULT
P1#
P1#show mpls forwarding-table
Codes: > - installed FTN, * - selected FTN, p - stale FTN,
B - BGP FTN, K - CLI FTN, t - tunnel, P - SR Policy FTN,
L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN, I - IGP-Shortcut,
U - unknown FTN, O - SR-OSPF FTN, i - SR-ISIS FTN, k - SR-CLI FTN
Code FEC FTN-ID Nhlfe-ID Tunnel-id Pri LSP-Type Out-Label Out-Intf ELC Nexthop
i> 1.1.1.1/32 1 5 0 Yes LSP_DEFAULT 3 eth1 No 10.1.2.1
i> 1.1.1.3/32 2 3 0 Yes LSP_DEFAULT 3 eth2 No 10.2.3.2
i> 1.1.1.3/32 10 15 0 No LSP_DEFAULT 16003 - No 10.2.6.2
i> 1.1.1.4/32 3 7 0 Yes LSP_DEFAULT 16004 eth2 No 10.2.3.2
i> 1.1.1.4/32 11 20 0 No LSP_DEFAULT 16004 - No 10.2.6.2
i> 1.1.1.4/32 16 26 2204 Yes LSP_DEFAULT 16004 eth2 No 10.2.3.2
i> 1.1.1.5/32 4 8 0 Yes LSP_DEFAULT 16005 eth3 No 10.2.6.2
i> 1.1.1.5/32 12 21 0 No LSP_DEFAULT 16005 - No 10.2.3.2
i> 1.1.1.5/32 15 25 2203 Yes LSP_DEFAULT 16005 eth3 No 10.2.6.2
i> 1.1.1.6/32 5 10 0 Yes LSP_DEFAULT 3 eth3 No 10.2.6.2
i> 1.1.1.6/32 13 22 0 No LSP_DEFAULT 16006 - No 10.2.3.2
i> 1.1.1.7/32 6 11 0 Yes LSP_DEFAULT 16007 eth2 No 10.2.3.2
i> 1.1.1.7/32 14 24 0 No LSP_DEFAULT 16007 - No 10.2.6.2
K> 202.1.1.0/24 7 - - - LSP_DEFAULT - eth2 No 1.1.1.7
P1#
P1#show mpls ftn-table
Primary FTN entry with FEC: 1.1.1.1/32, id: 1, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A, Color: 0
Cross connect ix: 1, in intf: - in label: 0 out-segment ix: 1
Owner: N/A, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 1, owner: N/A, Stale: NO, out intf: eth1, out label: 3
Nexthop addr: 10.1.2.1 cross connect ix: 1, op code: Push
Primary FTN entry with FEC: 1.1.1.3/32, id: 2, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A, Color: 0
Cross connect ix: 2, in intf: - in label: 0 out-segment ix: 2
Owner: N/A, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 2, owner: N/A, Stale: NO, out intf: eth2, out label: 3
Nexthop addr: 10.2.3.2 cross connect ix: 2, op code: Push
Non-primary FTN entry with FEC: 1.1.1.3/32, id: 10, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 6, in intf: - in label: 0 out-segment ix: 14
Owner: ISIS-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 14, owner: ISIS-SR, Stale: NO, ISIS-SR out intf: eth3, transport out intf: N/A, out label: 16003
Nexthop addr: 10.2.6.2 cross connect ix: 6, op code: Push and Lookup
bypass_ftn_ix 15
Primary FTN entry with FEC: 1.1.1.4/32, id: 3, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A, Color: 0
Cross connect ix: 3, in intf: - in label: 0 out-segment ix: 6
Owner: ISIS-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 6, owner: ISIS-SR, Stale: NO, out intf: eth2, out label: 16004
Nexthop addr: 10.2.3.2 cross connect ix: 3, op code: Push
Non-primary FTN entry with FEC: 1.1.1.4/32, id: 11, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 10, in intf: - in label: 0 out-segment ix: 18
Owner: ISIS-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 18, owner: ISIS-SR, Stale: NO, ISIS-SR out intf: eth3, transport out intf: N/A, out label: 16004
Nexthop addr: 10.2.6.2 cross connect ix: 10, op code: Push and Lookup
bypass_ftn_ix 15
Primary FTN entry with FEC: 1.1.1.4/32, id: 16, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 2204, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 3, in intf: - in label: 0 out-segment ix: 6
Owner: ISIS-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 6, owner: ISIS-SR, Stale: NO, out intf: eth2, out label: 16004\24960
Nexthop addr: 10.2.3.2 cross connect ix: 3, op code: Push
Primary FTN entry with FEC: 1.1.1.5/32, id: 4, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A, Color: 0
Cross connect ix: 7, in intf: - in label: 0 out-segment ix: 16
Owner: ISIS-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 16, owner: OSPF-SR, Stale: NO, out intf: eth3, out label: 16005
Nexthop addr: 10.2.6.2 cross connect ix: 7, op code: Push
Non-primary FTN entry with FEC: 1.1.1.5/32, id: 12, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 8, in intf: - in label: 0 out-segment ix: 17
Owner: ISIS-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 17, owner: OSPF-SR, Stale: NO, OSPF-SR out intf: eth2, transport out intf: N/A, out label: 16005
Nexthop addr: 10.2.3.2 cross connect ix: 8, op code: Push and Lookup
bypass_ftn_ix 16
Primary FTN entry with FEC: 1.1.1.5/32, id: 15, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 2203, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 7, in intf: - in label: 0 out-segment ix: 16
Owner: ISIS-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 16, owner: OSPF-SR, Stale: NO, out intf: eth3, out label: 16005\24961
Nexthop addr: 10.2.6.2 cross connect ix: 7, op code: Push
Primary FTN entry with FEC: 1.1.1.6/32, id: 5, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A, Color: 0
Cross connect ix: 5, in intf: - in label: 0 out-segment ix: 9
Owner: N/A, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 9, owner: N/A, Stale: NO, out intf: eth3, out label: 3
Nexthop addr: 10.2.6.2 cross connect ix: 5, op code: Push
Non-primary FTN entry with FEC: 1.1.1.6/32, id: 13, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 9, in intf: - in label: 0 out-segment ix: 19
Owner: ISIS-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 19, owner: OSPF-SR, Stale: NO, OSPF-SR out intf: eth2, transport out intf: N/A, out label: 16006
Nexthop addr: 10.2.3.2 cross connect ix: 9, op code: Push and Lookup
bypass_ftn_ix 16
Primary FTN entry with FEC: 1.1.1.7/32, id: 6, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A, Color: 0
Cross connect ix: 4, in intf: - in label: 0 out-segment ix: 4
Owner: ISIS-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 4, owner: ISIS-SR, Stale: NO, out intf: eth2, out label: 16007
Nexthop addr: 10.2.3.2 cross connect ix: 4, op code: Push
Non-primary FTN entry with FEC: 1.1.1.7/32, id: 14, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 11, in intf: - in label: 0 out-segment ix: 23
Owner: ISIS-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 23, owner: ISIS-SR, Stale: NO, ISIS-SR out intf: eth3, transport out intf: N/A, out label: 16007
Nexthop addr: 10.2.6.2 cross connect ix: 11, op code: Push and Lookup
bypass_ftn_ix 15
Primary FTN entry with FEC: 202.1.1.0/24, id: 7, row status: Active, Tunnel-Policy: N/A
Owner: CLI, distance: 115, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Transport Tunnel id: 0, Protected LSP id: 0, Description: N/A, Color: 0
Cross connect ix: 4, in intf: - in label: 0 out-segment ix: 4
Owner: ISIS-SR, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 4, owner: ISIS-SR, Stale: NO, out intf: eth2, out label: 16007
Nexthop addr: 10.2.3.2 cross connect ix: 4, op code: Push
P1#
TI-LFA FRR for SR-Policy
The active segment of a packet (ie., the top label of the packet as seen by the receiving router) that is being forwarded using an SR-policy can be protected upon failure of its primary outgoing interface by enabling FRR for the SR-policy.
P1
P1#configure terminal | Enter configure mode |
P1(config)#segment-routing | Configuring segment-routing |
P1(config-sr)#traffic-engineering | Segment Routing traffic engineering |
P1(config-sr-te)#segment-list p5-p4-pe2 | Configure a segment-list |
P1(config-sr-sl)#index 10 segment-type-1 16006 | Configure the segment-list entry with index 10 and label as prefix-sid of P5 |
P1(config-sr-sl)#index 20 segment-type-1 16005 | Configure the segment-list entry with index 10 and label as prefix-sid of P4 |
P1(config-sr-sl)#index 30 segment-type-1 16007 | Configure the segment-list entry with index 10 and label as prefix-sid of PE2 |
P1(config-sr-sl)#exit-sr-sl | Exit segment-routing segment-list mode |
P1(config-sr-te)#policy to-pe2 | Configure an SR-policy |
P1(config-sr-pol)#color 11 end-point 1.1.1.7 | Configure SR-policy with key ie., color and end-point |
P1(config-sr-pol)#candidate-path 11 | Configure a candidate-path for the SR-policy |
P1(config-sr-pol-cp)#preference 100 | Configure the preference value for the candidate-path |
P1(config-sr-pol-cp)#explicit segment-list p5-p4-pe2 | Configure the candidate-path as explicit-path with segment- list |
P1(config-sr-pol-cp)#exit-pol-cp | Exit from SR policy candidate path configuration mode |
P1(config-sr-pol)#exit-sr-pol | Exit from SR policy configuration mode |
P1(config-sr-te)#policy-fast-reroute-enable | Enable segment-routing policy fast-reroute |
P1(config-sr-te)#exit | Exit segment-routing mode |
P1(config)#exit | Exit configure terminal mode |
P1(config)#commit | Commit the candidate configuration to the running configuration. |
Validation
P1
P1#show mpls forwarding-table 1.1.1.7/32
Codes: > - installed FTN, * - selected FTN, p - stale FTN,
B - BGP FTN, K - CLI FTN, t - tunnel, P - SR Policy FTN,
L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN, I - IGP-Shortcut,
U - unknown FTN, O - SR-OSPF FTN, i - SR-ISIS FTN, k - SR-CLI FTN
Code FEC FTN-ID Nhlfe-ID Tunnel-id Pri LSP-Type Out-Label Out-Intf ELC Nexthop
P> 1.1.1.7/32 8 13 1 Yes LSP_DEFAULT 3 eth3 No 10.2.6.2
P> 1.1.1.7/32 9 24 1 No LSP_DEFAULT 16006 - No 10.2.3.2
i 1.1.1.7/32 6 4 0 Yes LSP_DEFAULT 16007 eth2 No 10.2.3.2
i 1.1.1.7/32 14 23 0 No LSP_DEFAULT 16007 - No 10.2.6.2
P1#
P1#show mpls ftn-table 1.1.1.7/32
Primary FTN entry with FEC: 1.1.1.7/32, id: 8, row status: Active, Tunnel-Policy: N/A
Owner: SR_POLICY, distance: 0, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 1, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 12, in intf: - in label: 0 out-segment ix: 12
Owner: N/A, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 12, owner: N/A, Stale: NO, out intf: eth3, out label: 3\16005\16007
Nexthop addr: 10.2.6.2 cross connect ix: 12, op code: Push
Non-primary FTN entry with FEC: 1.1.1.7/32, id: 9, row status: Active, Tunnel-Policy: N/A
Owner: SR_POLICY, distance: 0, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 1, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 13, in intf: - in label: 0 out-segment ix: 11
Owner: SR_POLICY, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 11, owner: SR_POLICY, Stale: NO, SR_POLICY out intf: eth2, transport out intf: N/A, out label: 16006\16005\16007
Nexthop addr: 10.2.3.2 cross connect ix: 13, op code: Push and Lookup
bypass_ftn_ix 16
Primary FTN entry with FEC: 1.1.1.7/32, id: 6, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A, Color: 0
Cross connect ix: 4, in intf: - in label: 0 out-segment ix: 4
Owner: ISIS-SR, Persistent: No, Admin Status: Down, Oper Status: Down
Out-segment with ix: 4, owner: ISIS-SR, Stale: NO, out intf: eth2, out label: 16007
Nexthop addr: 10.2.3.2 cross connect ix: 4, op code: Push
Non-primary FTN entry with FEC: 1.1.1.7/32, id: 14, row status: Active, Tunnel-Policy: N/A
Owner: ISIS-SR, distance: 115, Action-type: Redirect to Tunnel, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, QoS Resource id: 0, Description: N/A, Color: 0
Cross connect ix: 11, in intf: - in label: 0 out-segment ix: 23
Owner: ISIS-SR, Persistent: No, Admin Status: Down, Oper Status: Down
Out-segment with ix: 23, owner: ISIS-SR, Stale: NO, ISIS-SR out intf: eth3, transport out intf: N/A, out label: 16007
Nexthop addr: 10.2.6.2 cross connect ix: 11, op code: Push and Lookup
bypass_ftn_ix 15
P1#
P1#show mpls ilm-table 1.1.1.7/32
Codes: > - installed ILM, * - selected ILM, p - stale ILM
K - CLI ILM, T - MPLS-TP, s - Stitched ILM
S - SNMP, L - LDP, R - RSVP, C - CRLDP
B - BGP , K - CLI , V - LDP_VC, I - IGP_SHORTCUT
O - OSPF/OSPF6 SR, i - ISIS SR, k - SR CLI
P - SR Policy, U - unknown
Code FEC/VRF/L2CKT ILM-ID In-Label Out-Label In-Intf Out-Intf/VRF Nexthop LSP-Type
i> 1.1.1.7/32 40 16007 16007 N/A eth2 10.2.3.2 LSP_DEFAULT
i> 1.1.1.7/32 53 16007 16007 N/A eth3 10.2.6.2 LSP_DEFAULT
P> 1.1.1.7/32 62 25600 16005 N/A eth3 10.2.6.2 LSP_DEFAULT
P1#
Last modified date: 10/20/2023