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Cisco Bug: CSCur69331 - Bundle-Eth with IPv6 is sending out 1280 size packet

Last Modified

Sep 12, 2019

Products (24)

  • Cisco ASR 9000 Series Aggregation Services Routers
  • Cisco CRS-X 8-Slot Single-Shelf System
  • Cisco CRS-1 Line Card Chassis (Dual)
  • Cisco CRS-1 16-Slot Line Card Chassis
  • Cisco CRS-X Multishelf System
  • Cisco CRS-3 Multishelf System
  • Cisco CRS-1 Line Card Chassis (Multi)
  • Cisco IOS XR Software
  • Cisco CRS-1 4-Slot Single-Shelf System
  • Cisco ASR 9922 Router
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Known Affected Releases

5.1.3.BASE

Description (partial)

Symptom:
MTU size of 1280 is published for IPv6 bundle-ether interface. Upon debugging below debug messages are seen:

RP/0/RSP0/CPU0:Oct 28 00:44:01.954 EDT: SSHD_[65893]: %SECURITY-SSHD-3-ERR_GENERAL : Failed in version exchange
LC/0/0/CPU0:Oct 28 00:44:07.951 EDT: ipv6_nd[247]: Sending RA to ff02::1 on Bundle-Ether2
LC/0/0/CPU0:Oct 28 00:44:07.951 EDT: ipv6_nd[247]:     MTU = 1280
LC/0/0/CPU0:Oct 28 00:44:07.951 EDT: ipv6_nd[247]: Advertsing prefix = 2620:0:167f:1001::2c/126, flags: 401
LC/0/0/CPU0:Oct 28 00:44:07.951 EDT: ipv6_nd[247]:     prefix = 2620:0:167f:1001::2c/126 onlink autoconfig
LC/0/0/CPU0:Oct 28 00:44:07.951 EDT: ipv6_nd[247]:           2592000/604800 (valid/preferred)
LC/0/0/CPU0:Oct 28 00:44:11.857 EDT: ipv6_nd[247]: REACH -> DELAY: 2620:0:167f:1001::42
LC/0/0/CPU0:Oct 28 00:44:16.858 EDT: ipv6_nd[247]: DELAY -> PROBE: 2620:0:167f:1001::42
LC/0/0/CPU0:Oct 28 00:44:16.858 EDT: ipv6_nd[247]: Sending NS for 2620:0:167f:1001::42 to 2620:0:167f:1001::42 from fe80::da67:d9ff:fe5a:6238 on GigabitEthernet0/0/1/0,LL_INFO len 8 paksize 72, plen 32

Conditions:
Issue is seen when customer is running XR version 5.1.3.

Related Community Discussions

ASR9K mrib[1145]: %ROUTING-MRIB-3-TLC_ERR : No TLC entry (lcl/add) while processing fwd upd, lcl_tid 0xe0000000
We ran into this tonight turning up some ASR9001 boxes.  Looking for more information. Log message: RP/0/RSP0/CPU0:2016 Jun 13 23:26:16.860 UTC: mrib[1145]: %ROUTING-MRIB-3-TLC_ERR : No TLC entry (lcl/add) while processing fwd upd, lcl_tid 0xe0000000, rem_tid 0x0, nodeid 0x821, cons_pid 0, self_pid 717117   Bug info: https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuq78451/?referring_site=bugquickviewclick   ASR9001 patched current as of 06/09/2016: RP/0/RSP0/CPU0:FLVL-9001-1#admin sh install summ ...
Latest activity: Jun 15, 2016
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