GE D-GES7600 manual Multicast Switching, Spanning Tree

Manageable 8/9-Port Switch

MULTICAST SWITCHING

For multicast switching, the D-GES7600 checks whether the received frame is a BPDU. If a BPDU is received, the switch forwards the frame to the CPU for processing by the spanning tree protocol. Otherwise, the D-GES7600 performs the following processes:

VLAN CLASSIFICATION

Same as for unicast switching.

LEARNING

Same as for unicast switching.

FILTERING

After learning the address, the switch checks:

-Whether the source port or destination port is not in the following state.

-Whether the source MAC address or destination MAC address is to be filtered.

If any of these conditions are met, the switch drops the receiving.

Otherwise, it continues with the forwarding process described below.

FORWARDING

The D-GES7600 floods the received multicast frame to all ports that are in the forwarding state within the VLAN, excluding the source port. At the same time, the switch ascertains the individual ports VLAN tagging/untagging configuration and corresponding VLAN to render the appropriate frame tagging when the frame is

ready to be transmitted.

AGING

The switch performs the aging process for the <MAC addresses, VLAN> pair in the switching database. Once a <MAC address, VLAN> pair is aged out, the SBD is modified.

SPANNING TREE

The D-GES7600 supports one Spanning Tree per bridged network.

User’s Manual 7