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Foundry Switch and Router Installation and Configuration Guide
12 - 8
December 2000
The
show span
command shows the following information.
Table 12.3: CLI Display of STP Information
This Field...
Displays...
Global STP Parameters
VLAN ID
The port-based VLAN that contains this spanning tree (instance of
STP). VLAN 1 is the default VLAN. If you have not configured port-
based VLANs on this device, all STP information is for VLAN 1.
Root ID
The ID assigned by STP to the root bridge for this spanning tree.
Root Cost
The cumulative cost from this bridge to the root bridge. If this device
is the root bridge, then the root cost is 0.
Root Port
The port on this device that connects to the root bridge. If this device
is the root bridge, then the value is “Root” instead of a port number.
Priority Hex
This device or VLAN’s STP priority. The value is shown in
hexadecimal format.
Note
: If you configure this value, specify it in decimal format. See
“Changing STP Bridge Parameters” on page 12-4.
Max age sec
The number of seconds this device or VLAN waits for a hello message
from the root bridge before deciding the root has become unavailable
and performing a reconvergence.
Hello sec
The interval between each configuration BPDU sent by the root
bridge.
Hold sec
The minimum number of seconds that must elapse between
transmissions of consecutive Configuration BPDUs on a port.
Fwd dly sec
The number of seconds this device or VLAN waits following a
topology change and consequent reconvergence.
Last Chang sec
The number of seconds since the last time a topology change
occurred.
Chg cnt
The number of times the topology has changed since this device was
reloaded.
Bridge Address
The STP address of this device or VLAN.
Note
: If this address is the same as the Root ID, then this device or
VLAN is the root bridge for its spanning tree.
Port STP Parameters
VLAN ID
The VLAN that the port is in.
Port Num
The port number.
Priority Hex
The port’s STP priority, in hexadecimal format.
Note
: If you configure this value, specify it in decimal format. See
“Changing STP Port Parameters” on page 12-5.
Path Cost
The port’s STP path cost.
Summary of Contents for Switch and Router
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