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Cisco Bug: CSCus79499 - 6vpe traceroute/clear cef failed: DPA ERROR--corrupted pkt length

Last Modified

Sep 20, 2018

Products (1)

  • Cisco IOS XRv Router

Known Affected Releases

5.4.0.BASE

Description (partial)

Symptom:
TOPO: CE1 (sunstone)--PE1(sunstone)--P(ASR9K)--PE2(ASR9K)--CE2(ASR9K).

CE1 to CE2 ipv6 traceroute is working:
Routing entry for 102:1::1/128
  Known via "bgp 100", distance 20, metric 0
  Tag 1, type external
  Installed Feb  4 13:58:05.580 for 00:14:09
  Routing Descriptor Blocks
    901:a02:2::2, from 901:a02:2::2, BGP external, BGP multi path
      Route metric is 0
    2002:c003:100::2, from 2002:c003:100::2, BGP external, BGP multi path
      Route metric is 0
    2002:c003:400::2, from 2002:c003:400::2, BGP external, BGP multi path
      Route metric is 0
  No advertising protos.
RP/0/RP0/CPU0:ce1#RP/0/RP0/CPU0:Feb  4 14:12:34.077 : processmgr[51]: %OS-SYSMGR-3-ERROR : fpd-serv(1) (jid 370) exited, will be respawned with a delay (slow-restart)
RP/0/RP0/CPU0:Feb  4 14:12:34.077 : processmgr[51]: %OS-SYSMGR-3-ERROR : fpd-serv(370) (fail count 26) will be respawned in 120 seconds
RP/0/RP0/CPU0:Feb  4 14:12:34.078 : processmgr[51]: %OS-SYSMGR-7-DEBUG : Feature:fpd-serv fpd-serv[370] (pid 11901) has not sent proc-ready within 90 seconds

RP/0/RP0/CPU0:ce1#
RP/0/RP0/CPU0:ce1#traceroute 102:1::1 source 101:1::1

Type escape sequence to abort.
Tracing the route to 102:1::1

 1  901:a02:2::2 4 msec 2 msec 2 msec
 2  106:4::1 [MPLS: Labels 16000/16003 Exp 0] 2 msec 2 msec 2 msec
 3  105:1::1 [MPLS: Label 16003 Exp 0] 2 msec 2 msec 2 msec
 4  102:1::1 2 msec 2 msec 1 msec
RP/0/RP0/CPU0:ce1#

But from CE2 to CE1, the route failed to reach to CE1:
RP/0/RSP0/CPU0:ce2#traceroute 101:1::1 source 102:1::1
Wed Feb  4 14:13:46.072 EST

Type escape sequence to abort.
Tracing the route to 101:1::1

 1  192:a01:1::2 1 msec 0 msec 0 msec
 2  106:4::1 [MPLS: Labels 16001/24011 Exp 0] 1 msec 0 msec 0 msec
 3  104:1::1 [MPLS: Label 24011 Exp 0] 1 msec 0 msec 0 msec
 4   *  *  *
 5   *  *  *
 6   *  *  *
 7   *  *  *
 8   *  *  *
 9   ?  ?  ?
 10  ?  *  *
 11  *  *  *
 12  *  *  *
 13  *  *
RP/0/RSP0/CPU0:ce2#

From CE1 dpa log the following error is seen:
Feb  4 14:13:45.8658: DPA_ERROR: Unable to receive injected packet below becausee
packet length 17825872 exceeds the maximum length of 10000

PE1 dpa log ha no such error.

Then all the interface back to back ping between CE1 and PE1 failed.

Conditions:
image:
Refpoint = calvados/release@flex-xr-twig/2
Built By     : lucaslee
 Built On     : Mon Feb  2 16:19:54 EST 2015
 Build Host   : ott-lb-028
 Workspace    : /workspace2/lucaslee/ws-flex-xr-twig-0202
 Source Base  : ios_ena
 Devline      : flex-xr-twig
 Devline Type : ACME Project
 flex-xr-twig   EFR-00000296130   Project
 flex-xr        EFR-00000294743   Project
 ci-531         EFR-00000292004   Lineup
 ci-530         EFR-00000290307   Lineup
 default        EFR-00000289219   Lineup
RP/0/RP0/CPU0:ce1#
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