Cisco Bug: CSCvt12153 - CSPF check backup path failure when interoperability with Alu7750 at 701
Sep 02, 2020
- Cisco ASR 9000 Series Aggregation Services Routers
Known Affected Releases
Symptom: Auto-tunnel backup path failure in the following topology. Active path: 540 -> Alu1 Backup path: 540 -> Alu2 -> Alu1 Alu2-----Alu1 - - - - - - ncs540 From debug, display no path, if shutdown link between 540 and alu1, LSP can work, 540 -> Alu2 -> Alu1 RP/0/RP0/CPU0:Feb 19 00:19:31.185 UTC: te_control: DBG-PATH-SPF: rrr_pcalc_unthread_tent_db:7972 (Tunnel ID: 6155): TENT database is empty RP/0/RP0/CPU0:Feb 19 00:19:31.184 UTC: te_control: DBG-PATH-LOOKUP: rrr_pcalc_get_path_internal:11449 (Tunnel ID: 6155): TE-PCALC_PATH: No Path to destination 10.13.200.1 And had following debug: RP/0/RP0/CPU0:Feb 19 16:15:43.502 UTC: te_control: DBG-PATH-SPF: rrr_pcalc_node_exclude:3074 (Tunnel ID: 0): TE-PCALC_SPF: rrr_pcalc_node_exclude: marked 0100.1320.0001.00 gen 20155, igp IS-IS 9919 level-1 Conditions: XR: 701 The issue was found when set up backup path by auto-tunnel.
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