HP FlexFabric 5700 Series Configuration Manual page 54

Figure 19 Sub-VLAN-based multicast VLAN
IGMP snooping manages router ports in the multicast VLAN and member ports in each sub-VLAN. When
Switch A receives multicast data from the multicast source, it sends only one copy of the multicast data to
the multicast VLAN on Switch B. Then, Switch B sends a separate copy to each sub-VLAN of the multicast
VLAN.
Port-based multicast VLAN
As shown in
Host A, Host B, and Host C are in VLAN 2 through VLAN 4, respectively.
•
On Switch B, VLAN 10 is a multicast VLAN.
•
All the user ports (ports with attached hosts) are hybrid ports and assigned to VLAN 10.
•
• IGMP snooping is enabled for the multicast VLAN and VLAN 2 through VLAN 4.
Figure 20 Port-based multicast VLAN
Source
IGMP snooping manages the router ports and member ports in the multicast VLAN. When Switch A
receives multicast data from the multicast source, it sends only one copy of the multicast data to the
multicast VLAN on Switch B. Then, Switch B sends a separate copy to each user port in the multicast
VLAN.
Figure 20:
Multicast packets
VLAN 10 (Multicast VLAN)
XGE1/0/1
Switch A Switch B
IGMP querier
VLAN 2
VLAN 3
XGE1/0/2
XGE1/0/3
XGE1/0/4
VLAN 4
49
Receiver
Host A
Receiver
Host B
Receiver
Host C