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6 - Show Bridge
The Show Bridge option displays the Spanning Tree Protocol status of the bridge. The display of a Root bridge is
shown below:
Bridge Status
Spanning Tree Protocol : Enabled
Bridge ID
Topology change
Designated Root
Root path cost
Root port
Network Forward delay
Network Max age
Network Hello time
Bridge Forward delay
Bridge Max age
Bridge Hello time
Spanning Tree Protocol
Indicates whether the Spanning Tree Protocol is Enabled or Disabled.
Bridge ID
:
Designated Root
:
The first part of each string indicates the (default) decimal Bridge Priority (32768). Refer to Option 4.
The remaining part of the string is the MAC address of the bridge and of the Root Bridge respectively.
If the Bridge ID string is identical to the Designated Root (bridge) string, then this bridge is the Root Bridge.
The Designated Root is the bridge sending/receiving frames to/from the attached LAN towards the Root Bridge.
Topology change
:
If the topology is stable, this value is 0.
If the topology is changing, this value is 1.
Root path cost
:
Root port
:
If this bridge is the Root Bridge, the Root path cost is 0 and the Root port value is None, as shown in the above
display.
If this bridge is a non-root bridge, the cost is determined by the sum of this bridge's path costs leading to the Root
Bridge.
The Root port of a non-root bridge is the port closest to the Root Bridge. It sends and receives protocol messages
to/from the bridge and the Root Bridge. If this bridge is not the Root Bridge, the Root Port value will be in the
format 0x8001. The "0x" is an indicator that the values to follow are in hex. Following the "0x" is the hex value
of the decimal Port Priority. (The default Port priority of decimal 128 yields a hex value of 80.) Following the hex
value is the port number (01). Default port priority values therefore yield a Root port value of 0x8001.
Menus Reference Manual: Spanning Tree Menu
: 32768-0000d0010101
: 0
: 32768-0000d0010101
: 0
: None
: 15 seconds
: 20 seconds
: 2 seconds
: 15 seconds
: 20 seconds
: 2 seconds
:
Enabled
32768-0000d0010101
32768-0000d0010101
0
0
None
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