ZyXEL Communications LAYER 3 ES-3124 - Manual (Page 280)

ES-3124 User’s Guide
278 Chapter 36 Configuration Mode Commands
An example using spanning-tree command is shown next.
• 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 10 with a path cost of 150.
• Set the priority for port 10 to 20.
maximum-age <6-40> = 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.
forward-delay <4-
30> = 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.
<port-list> path-
cost <1-65535> = Enables STP on the specified ports.
Specifies the the cost of transmitting a frame on to a LAN
through that port. It is assigned according to the speed of the
bridge.
<port-list>
priority <0-255> = 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.
<port-list>
treeIndex <1-2> = Specifies which STP configuration these ports will participate
in. (
mrstp command only).
ras(config)# spanning-tree priority 0
ras(config)# spanning-tree hello-time 4 maximum-age 20 forward-delay 15
ras(config)# spanning-tree 10 path-cost 150
ras(config)# spanning-tree 10 priority 20