Multicast IGMP Snooping

From AN!Wiki
Jump to: navigation, search

 AN!Wiki :: Multicast IGMP Snooping

In theory, a managed switch with IGMP Snooping enabled will keep track of what devices have joined multicast groups and only forward multicast packets to those ports. In practice, this doesn't always work. In clustering, if a node fails to receive a multicast packet, it will assume that the other node did not send one. This is the mechanism used for determining when a node has died and thus needs to be fenced. For this reason, if you enable IGMP Snooping, you must ensure that it is working properly and indeed forwarding multicast messages between nodes.

  • Wikipedia has a more thorough explanation of IGMP Snooping.


Any questions, feedback, advice, complaints or meanderings are welcome.
Us: Alteeve's Niche! Support: Mailing List IRC: #clusterlabs on Freenode   © Alteeve's Niche! Inc. 1997-2019
legal stuff: All info is provided "As-Is". Do not use anything here unless you are willing and able to take responsibility for your own actions.
Personal tools