[f-nsp] Bigiron RX4 - IPV6 causing out of nexthop entries

[Dunc]

Hi again Pieter,

Thanks for your reply.

I take it that you were doing ECMP then, and have had to disable it? We
weren't doing any, but I tried the command anyway just in case and it
seems to be the default, and unfortunately made no difference.


I do have some news now though so thought I'd add to the thread for the
benefit of others.

It seems we are hitting this bug now, after fixing the previous one a
month ago.


Defect ID: DEFECT000360473              Technical Severity: Medium
Summary: IP "nexthop" depletion may occur when processing ipv6 traffic
before route convergence complete
Symptom: The customer RX log showed
Mar 25 21:36:49:I:INFO: Out of nexthop entries for path count 1 on slot 3.
Mar 25 21:36:47:I:INFO: Out of nexthop entries for path count 1 on slot 2.
after changing OSPF costs causing nexthop route recalculation
show ipv6 nexthop showed repeating prefix:
1 NextHopId 53, NumECMPPaths 1, NumPaths 1, Action 0, Network 1,
NhEntryAddr 0x2d381414
Age 0, RefCnt 1, AddrSum 3, SptrFwd 0x2d380af4 SptrBwd 0x2d380af4
NextHop 2404:5200:0:2::1 OutInt 2151 DirConn 0 Nd6Entry 0x2c23b000 InstId 5
2 NextHopId 66, NumECMPPaths 1, NumPaths 1, Action 0, Network 1,
NhEntryAddr 0x2d380af4
Age 0, RefCnt 1, AddrSum 3, SptrFwd 0x2d380bf4 SptrBwd 0x2d380bf4
NextHop 2404:5200:0:2::1 OutInt 2151 DirConn 0 Nd6Entry 0x2c23b000 InstId 5
3 NextHopId 27, NumECMPPaths 1, NumPaths 1, Action 0, Network 1,
NhEntryAddr 0x2d380bf4
Age 0, RefCnt 1, AddrSum 3, SptrFwd 0x2d3812d4 SptrBwd 0x2d3812d4
NextHop 2404:5200:0:2::1 OutInt 2151 DirConn 0 Nd6Entry 0x2c23b000 InstId 5
4 NextHopId


Fixed in 2.8.0b


Could this be your issue too?

Cheers,

Dunc



-- 
Dunc Lockwood
Principal Network Engineer

The Bunker Secure Hosting Ltd.
Ash Radar Station
Marshborough Road
Sandwich
Kent CT13 0PL

T: 01304 814800
F: 01304 814899
E: dunc.lockwood at thebunker.net


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