User manual
20
wEb-bASED bROwSER MANAGEMENT
only to forward multicast trafc. When the querier election process is complete, the
switch simply relays IGMP queries received from the querier.
When sending IGMP packets, the switch uses its own IP address, if it has one, or
an address of 0.0.0.0, if it doesn’t have any assigned IP address (e.g., when sending
packets on a non-management VLAN). NOTE: IGMP Snooping switches perform
multicast pruning using a multicast frame’s destination MAC multicast address,
which depends on the group IP multicast address: IP address W.X.Y.Z corresponds
to MAC address 01-00-5E-XX-YY-ZZ, where XX is the lower 7 bits of X and YY and
ZZ are simply Y and Z coded in hexadecimal.
IP multicast addresses such as 224.1.1.1 and 225.1.1.1 will both map onto the same
MAC address 01-00-5E-01-01-01. This is indeed a problem for which the IETF
Network Working Group currently has offered no solution. Users are advised to be
aware of and avoid this problem.
From here, you can congure your Static Multicast Groups.
MAC Address: XX-XX-XX-XX-XX-XX, where XX ranges from 0 to FF. Default:
00-00-00-00-00-00. This is the multicast group MAC address.
VLAN ID: Options range from “1” (default) to “4094.” This is the VLAN identier of
the VLAN upon which the multicast group operates.
Ports: Select any combination of numbers valid for this parameter (default: none
selected). These are ports to which the multicast group trafc is forwarded.
Add: Click to add a new static multicast group.
Delete: Click to delete the item.
Static Multicast Group Table: From the static multicast table, you can view all of
the current static multicast groups’ information.