I do post the trace log´s next week.
The LSP from router A goes directly t Router B
10.55.0.63
From: 10.55.0.42, State: Up, ActiveRoute: 0, LSPname: 10.55.0.63:dt-rsvp-R42
ActivePath: (primary)
FastReroute desired
LSPtype: Dynamic Configured, Penultimate hop popping
LoadBalance: Random
Encoding type: Packet, Switching type: Packet, GPID: IPv4
*Primary State: Up
Priorities: 7 0
OptimizeTimer: 65535
SmartOptimizeTimer: 180
Reoptimization in 63620 second(s).
Computed ERO (S [L] denotes strict [loose] hops): (CSPF metric: 10)
10.55.250.234 S
Received RRO (ProtectionFlag 1=Available 2=InUse 4=B/W 8=Node 10=SoftPreempt 20=Node-ID):
10.55.250.234
6 Oct 20 11:52:34.164 Fast-reroute Detour Up
5 Oct 20 11:52:30.244 Selected as active path
4 Oct 20 11:52:30.243 Record Route: 10.55.250.234
3 Oct 20 11:52:30.240 Up
2 Oct 20 11:52:30.060 Originate Call
1 Oct 20 11:52:30.060 CSPF: computation result accepted 10.55.250.234
Created: Fri Oct 20 11:52:30 2017
The LSP from router B goes an other way over 4 routers
10.55.0.42
From: 10.55.0.63, State: Up, ActiveRoute: 0, LSPname: 10.55.0.42:dt-rsvp-R63
ActivePath: (primary)
FastReroute desired
LSPtype: Dynamic Configured, Penultimate hop popping
LoadBalance: Random
Encoding type: Packet, Switching type: Packet, GPID: IPv4
*Primary State: Up
Priorities: 7 0
OptimizeTimer: 65535
SmartOptimizeTimer: 180
Reoptimization in 26830 second(s).
Computed ERO (S [L] denotes strict [loose] hops): (CSPF metric: 10)
10.55.250.233 S
Received RRO (ProtectionFlag 1=Available 2=InUse 4=B/W 8=Node 10=SoftPreempt 20=Node-ID):
10.55.250.233
74 Oct 20 01:15:50.007 CSPF: computation result ignored, new path no benefit
73 Oct 19 09:04:38.751 Fast-reroute Detour Up
72 Oct 19 09:04:35.542 Make-before-break: Switched to new instance
71 Oct 19 09:04:35.542 Fast-reroute Detour Down
70 Oct 19 09:04:34.541 Record Route: 10.55.250.233
69 Oct 19 09:04:34.541 Up
68 Oct 19 09:04:34.420 Originate make-before-break call
67 Oct 19 09:04:34.420 CSPF: computation result accepted 10.55.250.233
66 Oct 19 09:04:34.419 CSPF: Reroute due to re-optimization
65 Oct 19 09:01:50.065 Record Route: 10.55.250.229(flag=1) 10.55.250.37(flag=9) 10.55.250.114(flag=9) 10.55.250.166(flag=1) 10.55.250.153
64 Oct 19 09:01:47.249 Fast-reroute Detour Up
63 Oct 19 09:01:35.633 Record Route: 10.55.250.229(flag=1) 10.55.250.37 10.55.250.114(flag=9) 10.55.250.166(flag=1) 10.55.250.153
62 Oct 19 09:01:35.034 Record Route: 10.55.250.229(flag=1) 10.55.250.37 10.55.250.114(flag=9) 10.55.250.166 10.55.250.153
61 Oct 19 09:01:18.489 Record Route: 10.55.250.229(flag=1) 10.55.250.37 10.55.250.114 10.55.250.166 10.55.250.153
60 Oct 19 09:01:17.549 Make-before-break: Switched to new instance
59 Oct 19 09:01:16.546 Record Route: 10.55.250.229 10.55.250.37 10.55.250.114 10.55.250.166 10.55.250.153
58 Oct 19 09:01:16.546 Up
57 Oct 19 09:01:14.413 Pending path switchover, skip CSPF run
56 Oct 19 09:01:14.413 CSPF: link down/deleted: 10.55.250.234(10.55.0.63:336)(R63_SAP_RWE.00/10.55.0.63)->10.55.250.233(10.55.0.42:427)(R42-bfz.00/10.55.0.42)
55 Oct 19 09:01:14.016 Originate make-before-break call
54 Oct 19 09:01:14.016 CSPF: computation result accepted 10.55.250.229 10.55.250.37 10.55.250.114 10.55.250.166 10.55.250.153
53 Oct 19 09:01:13.833 10.55.250.234: Tunnel local repaired
52 Oct 19 09:01:13.830 Record Route: 10.55.250.229 10.55.250.37 10.55.250.114 10.55.250.166 10.55.250.153
51 Oct 19 09:01:13.830 10.55.250.234: Tunnel local repaired
50 Oct 19 09:01:13.830 10.55.250.234: Down
49 Oct 19 00:49:05.863 CSPF: computation result ignored, new path no benefit
48 Oct 18 06:36:54.865 Fast-reroute Detour Up
I think to need the weekend to understand why and to think about the problem.