spanning-tree [forward-delay <seconds>]
[hello-time <seconds>]
[maximum-age <seconds>]
[priority <0..65535>]
spanning-tree <[ethernet] port-list>[path-cost <1..65535>]
[priority <0..255>]
[mode <norm|fast>]
This command configures the parameters for operation of the switch in a spanning
tree topology. Note - the default spanning tree configuration complies with the
IEEE 802.1D standard recommended values and should not be changed without
thorough knowledge of spanning tree operation. Note: As per IEEE 802.1Q
Standard, this switch implements a single instance of Spanning Tree operating over
all VLANs.
Parameters:
path-cost <port-list><1..65535> - Individual port cost used to determine which
ports are forwarding ports. The defaults is 100 for 10 Mbps ports, 10 for
10/100TX and 100FX ports, and 5 for 100/1000TX and 1Gbps ports.
priority <port-list><0..255> - Another value used by spanning tree to the
forwarding ports. The port with the lowest number has the highest priority. The
default is 128.
mode <port-list> [norm | fast] (default: norm) - norm (for normal) mode causes
the port to operate according to the standard Spanning Tree Protocol - when
connected, the port progresses through the Listening, Learning, and either
Blocking or Forwarding states. fast mode causes the port to immediately
operate in the Forwarding State when a device is connected to it. Use this setting
only on ports that are connected to end nodes (for example: PCs, Workstation,
or printers). Caution: Changing the Mode to fast on ports connected to a hub or
switch may cause loops in your network that STP may not be able to detect, in
all cases.
forward-delay <seconds> - Time the switch waits between transition from
listening to learning and from learning to forwarding states. The range is 4 to 30.
The default is 15.
hello-time <seconds> - Time (in seconds) between messages transmitted when
the switch is root. The range is 1 to 10. The default is 2.
maximum-age <seconds> - Maximum message age (in seconds) of received
STP information before it is discarded. The range is 6 to 40. The default is 20.
priority <0..65535> - Switch (or bridge) priority used along with the switch
MAC address to determine which device is the root. The default is 32768.
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