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16-8
Spanning Tree Protocol (STP)
CLI: Configuring STP
Spanning Tree Protocol
(STP)
For example, to configure a maximum-age of 30 seconds and a hello-time of
3 seconds for STP:
HP4108(config)# spanning-tree maximum-age 30 hello-time 3
Reconfiguring Per-Port STP Operation on the Switch. This command
enables STP (if not already enabled) and configures the following per-port
parameters:
Table 16-2.Per-Port STP Parameters
You can also include STP general parameters in this command. See “Recon-
figuring General STP Operation on the Switch” on page 16-7.
Syntax: spanning-tree [ethernet] <port-list>
path-cost <1 - 65535>
priority <0 - 255>
mode <norm | fast>
Default: See table 16-2, above.
For example, the following configures ports C5 and C6 to a path cost of
15, a
priority of
100, and fast mode:
HP4108(config)# spanning-tree c5-c6 path-cost 15
priority 100 mode fast
Name Default Range Function
path-cost Ethernet: 100
10/100Tx:
10
100 Fx: 10
Gigabit: 5
1 - 65535 Assigns an individual port cost that the switch uses
to determine which ports are the forwarding ports.
priority 128 0 - 255 Used by STP to determine the port(s) to use for
forwarding. The port with the lowest number has
the highest priority.
mode norm norm
- or -
fast
Specifies whether a port progresses through the
listening, learning, and forwarding (or blocking)
states (“norm” mode) or transitions directly to the
forwarding state (“fast” mode).
(For information on when to use Fast mode, see
“STP Fast Mode” on page 16-10.)