yahoo-eng-team team mailing list archive

[Eugene Nikanorov <enikanorov@xxxxxxxxxxxx>]

That sounds like a blueprint/feature proposal, not a bug.
Can you bring this to the team meeting?

** Summary changed:

- Use multiple mullitcast group for handling the BUM traffic in tenant networks with vxlan
+ Use multiple multicast group for handling the BUM traffic in tenant networks with vxlan

** Changed in: neutron
       Status: New => Opinion

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https://bugs.launchpad.net/bugs/1377203

Title:
  Use multiple multicast group for handling the BUM traffic in tenant
  networks with vxlan

Status in OpenStack Neutron (virtual network service):
  Opinion

Bug description:
  Neutron at the moment have very limited capabilities for handling in
  tenant network multicast/unknown/broadcast traffic.

  Not just the ARP/DHCP traffic need to be considered, for example
  applications like inifinispan  can and prefers to use multicast for
  communication.

  vxlan is designed to be usable together with udp multicast, so  instead of having the sender node to send  high number of uni-cast packet flood  to every possible node on every BUM frame.
  The physical switches/routers nowadays able to handle even 32k multi-cast groups.

  If we have more virtual networks than the switch is able to handle
  several network could  share on the same mcast
  group.(mcast_addr[avaliable_mcast_addrs modulo VNI])

  Later this could be make smarter or could be combined with other
  packet replication strategies.

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