Servperso Systems

  • Status Closed
  • Percent Complete
  • Task Type Incident
  • Category VPS
  • Assigned To No-one
  • Operating System All
  • Severity Low
  • Priority Medium
  • Reported Version Development
  • Due in Version Undecided
  • Due Date Undecided
  • Votes
  • Private
Attached to Project: Servperso Systems
Opened by Servperso - 31.03.2021
Last edited by Servperso - 01.07.2021

FS#8 - IPv6 Connectivity issue on NL vm network

Today we got connectivity issue on VM at Netherland location.

After analyzing access1-mep, i can see all bgp session in timeout + no ping reply.

Dmesg full of :
[9908437.936625] neighbour: ndisc_cache: neighbor table overflow!
[9908437.936724] neighbour: ndisc_cache: neighbor table overflow!

After some verification, one of our customer was under heavy scan.
We drop scan source + increase some kernel value to handle bigger table.

If you got any issue let us know.

Closed by  Servperso
01.07.2021 12:31
Reason for closing:  Fixed
Servperso commented on 05.04.2021 00:29

Issue don't seems to reproduce, we can close this

Servperso commented on 07.04.2021 02:45

Problem still apparear today.
We put firewall to drop everything except allowed ip to pass on that IPv6 network to address the problem.


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