[Xorp-users] help me understand 224.0.0.22

[Hitoshi Asaeda]

> So what is the IGMP group addr (224.0.0.22) for?  What problem does it
> solve that isn't addressed by the table above?  How important is it that

Destination address for IGMPv3 report messages. See RFC3376.

> I allow this group in my security policies (firewalls, etc)?

If you want to support IGMPv3 and/or SSM, the answer is "yes".
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Hitoshi Asaeda