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Cisco Bug: CSCut02454 - IPv6 nbr unresolved over multiple paths with ISIS - L3 load balance code

Last Modified

Feb 10, 2017

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

5.4.0.BASE

Description (partial)

Symptom:
TOPO: TGN--sunstone---sunstone--TGN

Under uut: the following interfaces are under isis:
RP/0/RP0/CPU0:ott02-sim-012-uut#sh route 82.0.0.1

Routing entry for 82.0.0.1/32
  Known via "isis 100", distance 115, metric 20, type level-2
  Installed Feb 18 21:48:51.798 for 14:39:29
  Routing Descriptor Blocks
    91.1.0.2, from 109.1.13.2, via GigabitEthernet0/RP0/CPU0/1
      Route metric is 20
    91.4.0.2, from 109.1.13.2, via GigabitEthernet0/RP0/CPU0/4
      Route metric is 20
    109.1.17.1, from 109.1.13.2, via GigabitEthernet0/RP0/CPU0/1.1
      Route metric is 20
    109.1.18.1, from 109.1.13.2, via GigabitEthernet0/RP0/CPU0/1.2
      Route metric is 20
    109.1.1.2, from 109.1.13.2, via GigabitEthernet0/RP0/CPU0/1.110
      Route metric is 20
    109.1.2.2, from 109.1.13.2, via GigabitEthernet0/RP0/CPU0/1.111
      Route metric is 20
  No advertising protos.
RP/0/RP0/CPU0:ott02-sim-012-uut#                                         

Only the first one has traffic passing:
RP/0/RP0/CPU0:ott02-sim-012-uut#sh int GigabitEthernet0/RP0/CPU0/1 acc
GigabitEthernet0/RP0/CPU0/1
  Protocol              Pkts In         Chars In     Pkts Out        Chars Out
  IPV4_UNICAST             4082          2140807         4415          2334724
  IPV4_MULTICAST              0                0            6              420
  IPV6_UNICAST             7080          3729366         7012          3706730
  MPLS                     4267          2254916         3833          2034356
  CLNS                       18            24658            3             4491


RP/0/RP0/CPU0:ott02-sim-012-uut#sh int GigabitEthernet0/RP0/CPU0/1.1 acc
GigabitEthernet0/RP0/CPU0/1.1
  Protocol              Pkts In         Chars In     Pkts Out        Chars Out
  IPV4_UNICAST             4526          2387038         4639          2461897
  IPV4_MULTICAST              0                0            8              560
  MPLS                     4352          2288204         5143          2706474
  CLNS                       23            31467            4             5956


RP/0/RP0/CPU0:ott02-sim-012-uut#sh int GigabitEthernet0/RP0/CPU0/1.2 acc
GigabitEthernet0/RP0/CPU0/1.2
  Protocol              Pkts In         Chars In     Pkts Out        Chars Out
  IPV4_UNICAST             5948          3131244         5490          2886125
  IPV4_MULTICAST              0                0            9              630
  MPLS                     5128          2716636         6141          3246297
  CLNS                       23            31467            5             7445


RP/0/RP0/CPU0:ott02-sim-012-uut#sh int GigabitEthernet0/RP0/CPU0/1.110 acc
GigabitEthernet0/RP0/CPU0/1.110
  Protocol              Pkts In         Chars In     Pkts Out        Chars Out
  IPV4_UNICAST             5894          3116499         5692          2991342
  IPV4_MULTICAST              0                0            9              630
  MPLS                     5561          2937874         5779          3058319
  CLNS                       27            36927            5             7465


RP/0/RP0/CPU0:ott02-sim-012-uut#sh int GigabitEthernet0/RP0/CPU0/1.111 acc
GigabitEthernet0/RP0/CPU0/1.111
  Protocol              Pkts In         Chars In     Pkts Out        Chars Out
  IPV4_UNICAST             5457          2875369         7029          3729768
  IPV4_MULTICAST              0                0           10              700
  MPLS                     6361          3373148         5961          3144608
  CLNS                       27            37491            6             8958


RP/0/RP0/CPU0:ott02-sim-012-uut#sh int GigabitEthernet0/RP0/CPU0/4 acc
GigabitEthernet0/RP0/CPU0/4
  Protocol              Pkts In         Chars In     Pkts Out        Chars Out
  IPV4_UNICAST             7371          3902536         5639          2978236
  IPV4_MULTICAST              0                0           11              770
  MPLS                     7640          4039578         6173          3258419
  CLNS                       30            41478            6             8982


RP/0/RP0/CPU0:ott02-sim-012-uut#                                                                 
RP/0/RP0/CPU0:ott02-sim-012-uut#show ipv6 neighbors gigabitEthernet 0/RP0/CPU0$
IPv6 Address                              Age Link-layer Addr State Interface            Location
[Mcast adjacency]                           - 0000.0000.0000 REACH Gi0/RP0/CPU0/4       0/RP0/CPU0
RP/0/RP0/CPU0:ott02-sim-012-uut#show ipv6 neighbors gigabitEthernet 0/RP0/CPU0$
IPv6 Address                              Age Link-layer Addr State Interface            Location
[Mcast adjacency]                           - 0000.0000.0000 REACH Gi0/RP0/CPU0/4       0/RP0/CPU0
RP/0/RP0/CPU0:ott02-sim-012-uut#show ipv6 neighbors gigabitEthernet 0/RP0/CPU0$
IPv6 Address                              Age Link-layer Addr State Interface            Location
fe80::5046:1ff:fee8:579a                 153  5246.01e8.579a REACH Gi0/RP0/CPU0/1       0/RP0/CPU0
[Mcast adjacency]                           - 0000.0000.0000 REACH Gi0/RP0/CPU0/1       0/RP0/CPU0
RP/0/RP0/CPU0:ott02-sim-012-uut#show ipv6 neighbors gigabitEthernet 0/RP0/CPU0$
IPv6 Address                              Age Link-layer Addr State Interface            Location
[Mcast adjacency]                           - 0000.0000.0000 REACH Gi0/RP0/CPU0/1.1     0/RP0/CPU0
RP/0/RP0/CPU0:ott02-sim-012-uut#show ipv6 neighbors gigabitEthernet 0/RP0/CPU0$
IPv6 Address                              Age Link-layer Addr State Interface            Location
[Mcast adjacency]                           - 0000.0000.0000 REACH Gi0/RP0/CPU0/1.2     0/RP0/CPU0
RP/0/RP0/CPU0:ott02-sim-012-uut#show ipv6 neighbors gigabitEthernet 0/RP0/CPU0$
IPv6 Address                              Age Link-layer Addr State Interface            Location
[Mcast adjacency]                           - 0000.0000.0000 REACH Gi0/RP0/CPU0/1.110   0/RP0/CPU0
RP/0/RP0/CPU0:ott02-sim-012-uut#show run int gigabitEthernet 0/RP0/CPU0/4
interface GigabitEthernet0/RP0/CPU0/4
 description interface13 -> ott02-sim-012-r1:GigabitEthernet0/RP0/CPU0/4
 mtu 1514
 ipv4 address 91.4.0.1 255.255.255.0
 ipv4 verify unicast source reachable-via any allow-self-ping
 ipv6 verify unicast source reachable-via any allow-self-ping
 ipv6 address 901:a04:4::1/112
 load-interval 30
 ipv4 access-group passv4inBFI1_5 ingress hardware-count
 ipv4 access-group passv4outBFI1_5 egress hardware-count
!

RP/0/RP0/CPU0:ott02-sim-012-uut#ping 901:a04:4::2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 901:a04:4::2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
RP/0/RP0/CPU0:ott02-sim-012-uut#sh ipv6 neighbors gigabitEthernet 0/RP0/CPU0/1$
IPv6 Address                              Age Link-layer Addr State Interface            Location
[Mcast adjacency]                           - 0000.0000.0000 REACH Gi0/RP0/CPU0/1.110   0/RP0/CPU0
RP/0/RP0/CPU0:ott02-sim-012-uut#sh ipv6 neighbors gigabitEthernet 0/RP0/CPU0/1$
IPv6 Address                              Age Link-layer Addr State Interface            Location
[Mcast adjacency]                           - 0000.0000.0000 REACH Gi0/RP0/CPU0/1.1     0/RP0/CPU0
RP/0/RP0/CPU0:ott02-sim-012-uut#s

Conditions:
image:
Refpoint = calvados/release@flex-xr-twig/2
Built By     : yuyou
 Built On     : Wed Feb 18 11:20:54 EST 2015
 Build Host   : ott-lb-012
 Workspace    : /workspace2/yuyou/att
 Source Base  : ios_ena
 Devline      : flex-xr-twig.lu
 Devline Type : ACME Project (Devline uses a project: flex-xr-twig%174)
 flex-xr-twig   EFR-00000297522   Project
 flex-xr        EFR-00000294743   Project
 ci-531         EFR-00000292004   Lineup
 ci-530         EFR-00000290307   Lineup
 default        EFR-00000289219   Lineup
RP/0/RP0/CPU0:ott02-sim-012-uut#
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  • Status
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