Westermo RedFox Series - Manual (Page 651)

Westermo OS Management Guide
Version 4.17.0-0
29.1.4 Blocking Local Ping Responses
To ensure that the multicast stream actually is received for routing by the CPU,
the WeOS router sends an IGMP join for the multicast group to be routed on the
given inbound interface. This has the odd side-effect that the router now also
responds to local pings to that group. To disable this, see
Sec. 19.7.16 .
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