Tp-Link T1600G-28PS (TL-SG2424P) [225/754] Bridge id

Tp-Link T1600G-28PS (TL-SG2424P) [225/754] Bridge id
Configuration Guide 203
Configuring Spanning Tree Spanning Tree
Figure 1-2 STP/RSTP Topology
Root bridge
Designated port
Root port
Root port
Backup port
Alternate port
Root port
Root port
Designated port
Designated port
Designated port
Designated port
Root Bridge
The root bridge is the root of a spanning tree. There is only one root bridge in each spanning tree,
and the root bridge has the lowest bridge ID.
Bridge ID
The value of the priority and MAC address of the switch. It is used to select the root bridge. The
bridge ID is composed of a 2-byte priority and a 6-byte MAC address. The priority is allowed to be
configured manually on the switch, and the switch with the lowest priority value will be elected
as the root bridge. If the priority of all the switches are the same, the switch with the lowest MAC
address is selected as the root bridge.
Port Role

Root Port
The port selected on non-root bridges to provide the lowest root path cost. There is only one root
port in each non-root bridge.

Designated Port
The port selected for each LAN segment to provide the lowest root path cost from that LAN
segment to the root bridge.

Alternate Port
If a port is not selected as the designated port for it receives better BPDUs from another switch, it
will become an alternate port.

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