Symptom

N7K1# show mpls ldp igp sync Ethernet1/1: LDP configured; LDP-IGP Synchronization enabled. Sync status: sync achieved; peer reachable. Sync delay time: 0 seconds (0 seconds left) IGP holddown time: infinite. Peer LDP Ident: 20.20.4.4:0 (GR) IGP enabled: isis-4766 Ethernet1/11: LDP not configured; LDP-IGP Synchronization enabled. Sync status: sync not achieved; peer reachable. Sync delay time: 0 seconds (0 seconds left) IGP holddown time: infinite. GR-only Reachability: 20.20.1.1:0 IGP enabled: isis-4766 N7K1# show ip route IP Route Table for VRF "default" '*' denotes best ucast next-hop '**' denotes best mcast next-hop '[x/y]' denotes [preference/metric] '%' in via output denotes VRF 0.0.0.0/0, ubest/mbest: 1/0 time *via x.x.x.x, [1/0], 04:34:12, static 10.10.1.1/32, ubest/mbest: 1/0 time *via 10.13.1.1, Eth1/11, [70/100], 00:07:46, isis-4766, L2 10.10.3.3/32, ubest/mbest: 2/0 time, attached *via 10.10.3.3, Lo0, [0/0], 04:34:37, local *via 10.10.3.3, Lo0, [0/0], 04:34:37, direct 10.10.4.4/32, ubest/mbest: 1/0 time *via 10.34.1.2, Eth1/1, [70/100], 00:07:46, isis-4766, L2 10.13.1.0/30, ubest/mbest: 1/0 time, attached *via 10.13.1.2, Eth1/11, [0/0], 04:34:22, direct 10.13.1.2/32, ubest/mbest: 1/0 time, attached *via 10.13.1.2, Eth1/11, [0/0], 04:34:22, local 10.14.1.0/30, ubest/mbest: 2/0 time *via 10.13.1.1, Eth1/11, [70/200], 00:07:46, isis-4766, L2 *via 10.34.1.2, Eth1/1, [70/200], 00:07:46, isis-4766, L2 10.34.1.0/30, ubest/mbest: 1/0 time, attached *via 10.34.1.1, Eth1/1, [0/0], 00:44:22, direct 10.34.1.1/32, ubest/mbest: 1/0 time, attached *via 10.34.1.1, Eth1/1, [0/0], 00:44:22, local 20.20.1.1/32, ubest/mbest: 1/0 time *via 10.13.1.1, Eth1/11, [70/100], 00:07:46, isis-4766, L2 <<<< metric not changed and still point to E1/11. 20.20.3.3/32, ubest/mbest: 2/0 time, attached *via 20.20.3.3, Lo6, [0/0], 04:34:37, local *via 20.20.3.3, Lo6, [0/0], 04:34:37, direct 20.20.4.4/32, ubest/mbest: 1/0 time *via 10.34.1.2, Eth1/1, [70/100], 00:07:46, isis-4766, L2 (mpls)

Conditions

use acl or delete mpls ip config to simulate mpls ldp sync failure

Workaround

NA

Further Problem Description