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Cisco Bug: CSCur61776 - MPLS LDP--peer router has no addr bounded--tcp socket error (Null tcb)

Last Modified

Jan 16, 2017

Products (1)

  • Cisco IOS XRv Router

Known Affected Releases

5.4.0.BASE

Description (partial)

Symptom:
With the two router topo (sunstone--asr9k), the peer router—ASR9K has no address bounded: sunstone failed to send out.
RP/0/RSP0/CPU0:ott02-sim-09-r1#sh mpls ldp nei
 
Peer LDP Identifier: 101.0.0.1:0
  TCP connection: 101.0.0.1:646 - 102.0.0.1:35363
  Graceful Restart: Yes (Reconnect Timeout: 120 sec, Recovery: 0 sec)
  Session Holdtime: 180 sec
  State: Oper; Msgs sent/rcvd: 69/2; Downstream-Unsolicited
  Up time: 00:01:43
  LDP Discovery Sources:
      TenGigE0/3/0/0
      TenGigE0/3/0/1
      TenGigE0/3/0/2
  Addresses bound to this peer:  --empty
 
I checked sunstone router, there is some error in the trace:
RP/0/RP0/CPU0:ott02-sim-09-uut#show mpls ldp trace error
Fri Nov  7 17:12:23.335 UTC
5 wrapping entries (992576 possible, 302400 allocated, 5099 filtered, 5104 total)
Nov  7 16:47:20.549 mpls/ldp/err 0/RP0/CPU0 t9449 [ERR][ROUTE]:391: SKIP msg (type 1) to RIB thread - thread not up
Nov  7 16:47:20.549 mpls/ldp/err 0/RP0/CPU0 t9449 [ERR][ROUTE]:556: SKIP msg (type 8) to RIB thread - thread not up
Nov  7 16:56:31.787 mpls/ldp/err 0/RP0/CPU0 t9449 [ERR][MISC]:3064: VRF(0x60000000): ldp_tcp_xport_incall: Call from 102.0.0.1 with Adj Grp(102.0.0.1) with NULL tcb
Nov  7 16:56:31.963 mpls/ldp/err 0/RP0/CPU0 t9449 [ERR][MISC]:3064: VRF(0x60000000): ldp_tcp_xport_incall: Call from 102.0.0.1 with Adj Grp(102.0.0.1) with NULL tcb
Nov  7 17:08:44.515 mpls/ldp/err 0/RP0/CPU0 t9449 [ERR][MISC]:3064: VRF(0x60000000): ldp_tcp_xport_incall: Call from 102.0.0.1 with Adj Grp(102.0.0.1) with NULL tcb
RP/0/RP0/CPU0:ott02-sim-09-uut#     
 
Also on the peer router (ASR9K), it has this error:
RP/0/RSP0/CPU0:Nov  7 13:14:44.466 : mpls_ldp[1047]: DBG-Peer[1], VRF(default): Peer(101.0.0.1:0): Release; Peer=0x102a4570
RP/0/RSP0/CPU0:Nov  7 13:14:44.746 : mpls_ldp[1047]: ERROR[1]: ldp_tcp_xport_transmit:2091, Peer 101.0.0.1:0, Error writing to socket
RP/0/RSP0/CPU0:Nov  7 13:14:44.898 : mpls_ldp[1047]: DBG-Peer[1], VRF(default): Peer(101.0.0.1:0): Created; peer_adj 0x102a4570
RP/0/RSP0/CPU0:Nov  7 13:14:44.898 : mpls_ldp[1047]: DBG-Peer[1], VRF(default): Peer(101.0.0.1:0): Queued Peer-Up work; AF 1

Conditions:
Image info: EFR 00000289979
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