OSPF and OSPFv3 error Router-ID duplicated

[Rojer-bkk]

Hi Expert,

I encounter the error %ROUTING-OSPFv3-3-DUP_RTRID for ospfv3 but both ospf and ospfv3 went down and auto brought up after 30 seconds. This is my 1st time found. No any OSPF configure changed during that time. I use CRS1, XR 4.0.1. I'm unsure the problem related to bug CSCtq55280.  Please advised and recommend me. Thank you.

[Vadim Zhovtanyuk]

HI there,

I'm sorry to say that but with this informaiton is not possible to confirm was it caused by CSCtq55280 or not.

I would recommend you to capture

-sh instal ac sum

-sh platform

-sh log

-sh run router ospf

-sh run router ospfv3

-sh ospf v3 trace all

-sh ospf trace all

and open a TAC case

With this information at least the initial analysis could be done and may be the engineer will ask you for more outputs.

HTH

/vadim

[Vadim Zhovtanyuk]

Hi again,

it is possible we hit CSCtq55280 but it has to be verified and the requested info may help to find out the root cause

HTH

/vadim

[Rojer-bkk]

Hi Vadim,

Thank you for information. The problem time during 17:53:39 til 17:54:05. From both OSPFv3 and OSPF trace file, do you found any clue?

[Vadim Zhovtanyuk]

Hi Rojer,

from OSPFv3 trace we have

3921 Mar 15 17:53:33.434 ospfv3_rib_batch_ipv6_delete: Delete route prefix 2403:6200::fffc/128 for interface PO0/5/4/2(0x1580580)

If you can provide a show log it may be very helpful

I'm expecting to see something happend with the POS 0/5/4/2 around this time.

HTH

/vadim

[Rojer-bkk]

Hi Vadim

Show log is attched. Thank you

[Vadim Zhovtanyuk]

Hi Rojer,

IN the log we have

RP/0/RP0/CPU0:Mar 15 17:53:26.832 GMT_TH: ospfv3[1027]: %ROUTING-OSPFv3-3-DUP_RTRID : Detected duplicate router ID 110.164.1.149 from fe80::ad41:4ff:feab:b4a8 on interface PO0/5/4/2

with the command 'sh ipv6 int pos 0/5/4/2"

You may check what is link-local address on the POS 0/5/4/2 because the issue semes to be related to

CSCtq55280.

HTH

/vadim

[Vadim Zhovtanyuk]

Sorry for wrong formatting

In the log we have

RP/0/RP0/CPU0:Mar 15 17:53:26.832 GMT_TH:  ospfv3[1027]: %ROUTING-OSPFv3-3-DUP_RTRID : Detected duplicate router ID  110.164.1.149 from fe80::ad41:4ff:feab:b4a8 on interface PO0/5/4/2

You may check what is link-local address on the POS 0/5/4/2

with the command 'sh ipv6 int pos 0/5/4/2"

because the issue semes to be related to

CSCtq55280.

HTH

/vadim

[Rojer-bkk]

Hi Vadim,

Thank you for information. Regarding bug ID CSCtq55280, i'm unsure 4.1.2 can be fixed this?

4.2(0.10)I

4.1(2.21)I

POS0/5/4/2 is Up, ipv6 protocol is Up, Vrfid is default (0x60000000)
  IPv6 is enabled, link-local address is fe80::ad41:4ff:feab:b4a8
  Global unicast address(es):
    2403:6200::a:0:0:9, subnet is 2403:6200::a:0:0:8/126

[Rojer-bkk]

I don't see this bug ID was published in release notes.

[Vadim Zhovtanyuk · Accepted solution]

Hi Rojer,

sorry for late reply.

The CSCtq55280 is fixed in 4.2.0 and 4.1.2 according to the information in bug itself.

hth

/vadim

[Rojer-bkk]

Hi Vadim,

I'm wondering why did Router-ID duplicated on ipv6 but effect to ipv4 (differenet address-family)?

[Vadim Zhovtanyuk]

Hi Roger,

that was the reason I recommended to open a TAC SR.

The investigation may take some time and effort to identify why two different AF were affected.

HTH

/vadim