ZyXEL Communications Dimension GS-4024 User Manual page 303

GS-4012F/4024 User's Guide
maximum-age <6-40>
forward-delay <4-
30>
<port-list> path-
cost <1-65535>
<port-list>
priority <0-255>
<port-list>
treeIndex <1-4>
An example using
• Enable STP on the switch.
• Set the bridge priority of the switch to 0.
• Set the Hello Time to 4, Maximum Age to 20 and Forward Delay to 15 on the switch.
• Enable STP on port 5 with a path cost of 150.
• Set the priority for port 5 to 20.
sysname(config)# spanning-tree priority 0
sysname(config)# spanning-tree hello-time 4 maximum-age 20 forward-delay
15
sysname(config)# spanning-tree 5 path-cost 150
sysname(config)# spanning-tree 5 priority 20
302
= Specifies the maximum time (in seconds) a switch can wait
without receiving a BPDU before attempting to reconfigure. All
switch ports (except for designated ports) should receive
BPDUs at regular intervals. Any port that ages out STP
information (provided in the last BPDU) becomes the
designated port for the attached LAN. If it is a root port, a new
root port is selected from among the switch ports attached to the
network.
= Specifies the maximum time (in seconds) a switch will wait
before changing states. This delay is required because every
switch must receive information about topology changes before
it starts to forward frames. In addition, each port needs time to
listen for conflicting information that would make it return to a
blocking state; otherwise, temporary data loops might result.
= Enables STP on the specified ports.
Specifies the cost of transmitting a frame on to a LAN through
that port. It is assigned according to the speed of the bridge.
= Specifies the priority for each port.
Priority decides which port should be disabled when more than
one port forms a loop in a switch. Ports with a higher priority
numeric value are disabled first.
= Specifies which STP configuration these ports will participate
in. ( command only).
mrstp
command is shown next.
spanning-tree
Chapter 44 Configuration Mode Commands