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[Kevin Benton <1490060@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

The default neighbor limits can be quite low (1024) for a kernel that
the l3 agent is running on. If the agent is serving hundreds of tenants,
it can quite easily blow past this limit, causing contention for a spot
in the ARP table (or neighbor table in IPv6) and network instability.

The l3 agent should set a higher default to match the expectations of a
node with an l3 agent on it.

** Affects: neutron
     Importance: Undecided
     Assignee: Kevin Benton (kevinbenton)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => Kevin Benton (kevinbenton)

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https://bugs.launchpad.net/bugs/1490060

Title:
  kernel arp neighbor limits should be adjusted by l3 agent

Status in neutron:
  New

Bug description:
  The default neighbor limits can be quite low (1024) for a kernel that
  the l3 agent is running on. If the agent is serving hundreds of
  tenants, it can quite easily blow past this limit, causing contention
  for a spot in the ARP table (or neighbor table in IPv6) and network
  instability.

  The l3 agent should set a higher default to match the expectations of
  a node with an l3 agent on it.

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