ZyXEL Communications ES-315-F - V3.70 Uživatelská příručka stáhnout pdf (Strana 303)

GS-4012F/4024 User’s Guide

302 Chapter 44 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 5 with a path cost of 150.

• Set the priority for port 5 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 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 <1-4>

= Specifies which STP configuration these ports will participate

in. (

mrstp command only).

sysname(config)# spanning-tree priority 0

sysname(config)# spanning-tree hello-time 4 maximum-age 20 forward-delay

sysname(config)# spanning-tree 5 path-cost 150

sysname(config)# spanning-tree 5 priority 20

1 2 ... 298 299 300 301 302 303 304 305 306 307 308 ... 362 363

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