Ещё:
После включения в 1700 vlan интерфейса gi1/0/3 (на другой стороне которого вообще этот vlan не сконфигурирован и IGMP запросы посылаться по нему не могут просто) обнаружил "интересные" записи в debug'е:Nov 20 14:48:46 10.65.10.1 886892: 1d04h: IGMPSN: mgt: Received topology change on vlan 1700 (switch is STP root)
Nov 20 14:48:46 10.65.10.1 886893: 1d04h: IGMPSN: mgt: Topo-change updates all GCEs with flood portset for in Vlan 1700
Nov 20 14:48:46 10.65.10.1 886894: 1d04h: IGMPSN: mgt: Updating all GCEs with flood portset for in Vlan 1700
Nov 20 14:48:46 10.65.10.1 886896: 1d04h: IGMPQR: vlan_id 1700: IGMP Global Leave detected on port NullPid in Disabled state
Nov 20 14:48:46 10.65.10.1 886897: 1d04h: Pvmp Gi1/0/3, VLAN 1700, FWDing
Nov 20 14:48:46 10.65.10.1 886898: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e40.988f adding
Nov 20 14:48:46 10.65.10.1 886899: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e7f.003e adding
Nov 20 14:48:46 10.65.10.1 886900: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e7f.0202 adding
Nov 20 14:48:46 10.65.10.1 886901: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e7f.0201 adding
Nov 20 14:48:46 10.65.10.1 886902: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e7f.fffd adding
Nov 20 14:48:46 10.65.10.1 886903: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e7f.fffa adding
Nov 20 14:48:46 10.65.10.1 886904: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e02.6401 adding
Nov 20 14:48:46 10.65.10.1 886905: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e02.6402 adding
Nov 20 14:48:46 10.65.10.1 886906: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e02.6403 adding
Nov 20 14:48:46 10.65.10.1 886907: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e02.6404 adding
Nov 20 14:48:46 10.65.10.1 886908: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e02.6405 adding
Nov 20 14:48:46 10.65.10.1 886909: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e02.6406 adding
Nov 20 14:48:46 10.65.10.1 886910: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e7f.0061 adding
Nov 20 14:48:46 10.65.10.1 886911: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e7f.0065 adding
Nov 20 14:48:46 10.65.10.1 886912: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e7f.0064 adding
Nov 20 14:48:46 10.65.10.1 886913: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e02.001b adding
Nov 20 14:48:46 10.65.10.1 886914: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e7f.0068 adding
Nov 20 14:48:46 10.65.10.1 886915: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e0a.0a0a adding
Nov 20 14:48:46 10.65.10.1 886916: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e4b.0d40 adding
Nov 20 14:48:46 10.65.10.1 886917: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e00.0003 adding
Nov 20 14:48:46 10.65.10.1 886918: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e00.013c adding
Nov 20 14:48:46 10.65.10.1 886919: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e32.3234 adding
Nov 20 14:48:46 10.65.10.1 886920: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e32.3335 adding
Nov 20 14:48:46 10.65.10.1 886921: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e32.3235 adding
Nov 20 14:48:46 10.65.10.1 886922: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e32.3334 adding
Nov 20 14:48:46 10.65.10.1 886923: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e37.3735 adding
Nov 20 14:48:46 10.65.10.1 886924: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e32.3434 adding
Nov 20 14:48:46 10.65.10.1 886925: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e32.3535 adding
Nov 20 14:48:46 10.65.10.1 886926: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e32.3435 adding
Nov 20 14:48:46 10.65.10.1 886927: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e32.3534 adding
Nov 20 14:48:46 10.65.10.1 886928: 1d04h: Pvmp FWD: Gi1/0/3, Vlan:1700, gda:0100.5e7f.005b adding
Nov 20 14:48:46 10.65.10.1 886929: 1d04h: IGMPSN: mgt: Vlan 1700, port Gi1/0/3 port_id 3 in fwd mode
Может хоть кто-нибудь в курсе, что за Pvmp и какого чёрта он добавляет мультикаст группы на этот порт????