13-25
802.1w Rapid Spanning Tree Protocol (RSTP) and 802.1d Spanning Tree Protocol (STP)
802.1p Spanning-Tree Protocol (STP)
Note Executing spanning-tree alone enables STP. Executing spanning-tree with one
or more of the above “STP Operating Parameters” does not enable STP. It only
configures the STP parameters (regardless of whether STP is actually running
(enabled) on the switch).
Syntax: spanning-tree
priority <0 - 65355>
maximum-age <6 - 40 seconds>
hello-time <1 - 10 seconds>
forward-delay <4 - 30 seconds>
Default: See table 13-3 on page 13-24.
For example, to configure a maximum-age of 30 seconds and a hello-time of 3
seconds for STP:
HPswitch(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 13-4. 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 13-24.
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
- or -
uplink
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 13-26.)
• For information on Uplink mode, see “Fast-
Uplink Spanning Tree Protocol (STP)” on page
13-27
!Software.book Page 25 Thursday, October 10, 2002 6:10 PM
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