Chapter 11
Configuring STP
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Default Spanning-Tree Configuration
Table 11-3
Table 11-3
Default Spanning-Tree Configuration
Feature
Enable state
Spanning-tree mode
Switch priority
Spanning-tree port priority (configurable on a per-interface basis)
Spanning-tree port cost (configurable on a per-interface basis)
Spanning-tree VLAN port priority (configurable on a per-VLAN basis)
Spanning-tree VLAN port cost (configurable on a per-VLAN basis)
Spanning-tree timers
Spanning-Tree Configuration Guidelines
If more VLANs are defined in the VTP than there are spanning-tree instances, you can enable PVST+
or rapid PVST+ on only 64 VLANs on the switch. The remaining VLANs operate with spanning tree
disabled. However, you can map multiple VLANs to the same spanning-tree instances by using MSTP.
For more information, see
OL-19808-01
Disabling Spanning Tree, page 11-14
Configuring the Root Switch, page 11-14
Configuring a Secondary Root Switch, page 11-16
Configuring Port Priority, page 11-16
Configuring Path Cost, page 11-18
Configuring the Switch Priority of a VLAN, page 11-19
Configuring Spanning-Tree Timers, page 11-20
shows the default spanning-tree configuration.
Chapter 12, "Configuring MSTP."
(optional)
(optional)
(optional)
(optional)
(optional)
(optional)
(optional)
Default Setting
Enabled on VLAN 1.
For more information, see the
Spanning-Tree Instances" section on
page
11-9.
PVST+. (Rapid PVST+ and MSTP are
disabled.)
32768.
128.
1000 Mb/s: 4.
100 Mb/s: 19.
10 Mb/s: 100.
128.
1000 Mb/s: 4.
100 Mb/s: 19.
10 Mb/s: 100.
Hello time: 2 seconds.
Forward-delay time: 15 seconds.
Maximum-aging time: 20 seconds.
Transmit hold count: 6 BPDUs
Catalyst 2360 Switch Software Configuration Guide
Configuring Spanning-Tree Features
"Supported
11-11