After IGMP Snooping is enabled and dot1q-tunnel
port is configured on the device, IGMP packets
received from dot1q-tunnel port will be handled in
two ways through IGMP Snooping:
1st way: Create multicast entries in the VLAN to
which the IMGP packets belong, and forward
IMGP packets in such VLAN.
For example: It is assumed that IGMP Snooping
has been enabled on the device; port A is a
dot1q-tunnel port; the default VLAN of port A is
VLAN 1, and packets from VLAN 1 and VLAN
10 can pass through port A. When multicast
requests of VLAN 10 are sent to port A, IGMP
Snooping will create the multicast entry of
VLAN 10 and forward the multicast requests to
the router port of VLAN 10.
2nd way: Create multicast entries in the default
VLAN to which the dot1q-tunnel ports belong,
and forward multicast packets in the default
VLAN of dot1q-tunnel port after inserting the
VLAN Tag of the default VLAN of dot1q-tunnel
port.
For example: It is assumed that IGMP Snooping
has been enabled on the device; port A is a
dot1q-tunnel port; the default VLAN of port A is
VLAN 1, and packets from VLAN 1 and VLAN
10 can pass through port A. When multicast
requests of VLAN 10 are sent to port A, IGMP
Snooping will create the multicast entry of
VLAN 1 and insert the VLAN Tag of VLAN 1
into multicast requests before forwarding the
To Next Page
Loading...
