Owner's Manual

GS700TPS Smart Switch Software Administration Manual
4-43 Configuring Switching Settings
v1.0, June 2009
– Backup – Provides a backup path to the designated port path toward the Spanning
Tree leaves. Backup ports occur only when two ports are connected in a loop by a
point-to-point link or when a LAN has two or more connections connected to a shared
segment.
– Disabled – Indicates the port is not participating in the Spanning Tree.
– Master – Indicates the port provides connectivity from the MSTP region to the
outlying CIST root.
• Designated Cost – Indicates that the default path cost is assigned according to the method
selected on the STP Configuration screen.
•Designated Bridge – Displays the ID of the bridge that connects the link or shared LAN
to the root.
• Designated Port – Displays the ID of the port on the designated bridge that connects the
link or the shared LAN to the root.
3. Select an MST to be displayed
4. Enter or modify Port Priority and Port Path Cost fields in the first row.
5. Click APPLY to update the device.
Multicast
Multicast forwarding allows a single packet to be forwarded to multiple destinations. L2 Multicast
service is based on L2 switch receiving a single packet addressed to a specific Multicast address.
Multicast forwarding creates copies of the packet, and transmits the packets to the relevant ports.
• Registered Multicast traffic – If traffic addressed to a registered Multicast group is seen it is
handled by an entry in the Multicast Filtering Database and forwarded only to the registered
ports.
• Unregistered Multicast traffic – If traffic addressed to an unregistered Multicast group is
seen it is handled by a special entry in the Multicast Filtering Database. The default setting of
this is to flood all such traffic (traffic in unregistered Multicast groups).
Layer 2 switching forwards Multicast packets to all relevant VLAN ports by default, treating the
packet as a Multicast transmission. Multicast traffic forwarding is functional. However, irrelevant