Product guide

Spanning-Tree Operation
802.1D Spanning-Tree Protocol (STP) on 5300xl, 3400cl and 6400cl Switches
Enabling STP implements the spanning tree protocol for all physical ports on
the switch, regardless of whether multiple VLANs are configured. Disabling
STP removes protection against redundant loops that can significantly slow
or halt a network.
This command enables STP with the current parameter settings or disables
STP without losing the most-recently configured parameter settings. (To learn
how the switch handles parameter changes, how to test changes without
losing the previous settings, and how to replace previous settings with new
settings, refer to the chapter titled “Switch Memory and Configuration” in the
Management and Configuration Guide for your switch.) When enabling STP,
you can also include the STP general and per-port parameters described in
the next two sections. When you use the “no” form of the command, you can
do so only to disable STP. (STP parameter settings are not changed when you
disable STP.)
Caution Because incorrect STP settings can adversely affect network performance,
HP recommends that you use the default STP parameter settings. You should
not change these settings unless you have a strong understanding of how STP
operates. For more on STP, see the IEEE 802.1D standard.
These additional commands are available in the Series 3400cl switches,
Syntax: show spanning-tree detail
Displays the 802.1D (STP) or 802.1w (RSTP) status and
counters for all ports on the switch, depending on which
spanning-tree option is enabled.
show spanning-tree < port-list > [ config | detail ]
config: Displays the 802.1D (STP) or 802.1w (RSTP)
spanning-tree configuration for the specified ports, depending
on which spanning-tree option is enabled.
detail: Displays the 802.1D (STP) or 802.1w (RSTP) status and
counters for the specified ports, depending on which
spanning-tree option is enabled.
Reconfiguring General STP Operation on the Switch. You can config-
ure one or more of the following parameters:
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