Снифер, заранее подключенный к порту коммутатора покажет:
Код:
11:03:19.450096 c8:be:19:c7:a1:e0 > 01:00:5e:00:00:01, ethertype IPv4 (0x0800), length 60: (tos 0xc0, ttl 1, id 4, offset 0, flags [none], proto IGMP (2), length 36, options (RA))
0.0.0.0 > 224.0.0.1: igmp query v3
11:03:20.980041 c8:be:19:c7:a1:e2 > 01:80:c2:00:00:00, 802.3, length 60: LLC, dsap STP (0x42) Individual, ssap STP (0x42) Command, ctrl 0x03: STP 802.1w, Rapid STP, Flags [Topology change, Proposal, Learn, Forward, Agreement], bridge-id 8000.c8:be:19:c7:a1:e0.8002, length 43
message-age 0.00s, max-age 20.00s, hello-time 2.00s, forwarding-delay 15.00s
root-id 8000.c8:be:19:c7:a1:e0, root-pathcost 0, port-role Designated
11:03:22.980019 c8:be:19:c7:a1:e2 > 01:80:c2:00:00:00, 802.3, length 60: LLC, dsap STP (0x42) Individual, ssap STP (0x42) Command, ctrl 0x03: STP 802.1w, Rapid STP, Flags [Proposal, Learn, Forward, Agreement], bridge-id 8000.c8:be:19:c7:a1:e0.8002, length 43
message-age 0.00s, max-age 20.00s, hello-time 2.00s, forwarding-delay 15.00s
root-id 8000.c8:be:19:c7:a1:e0, root-pathcost 0, port-role Designated
Выключение stp глобально - предотвращает рассылку igmp query v3.
Кстати, с source address 0.0.0.0 - имеет право, согласно RFC 4541. А вот коммутаторы, считающие его при этом querier - неправы.