Default SettingFeature
1000 Mb/s: 4
100 Mb/s: 19
10 Mb/s: 100
Spanning-tree port cost (configurable on a per-interface basis)
128Spanning-tree VLAN port priority (configurable on a per-VLAN
basis)
1000 Mb/s: 4
100 Mb/s: 19
10 Mb/s: 100
Spanning-tree VLAN port cost (configurable on a per-VLAN basis)
Hello time: 2 seconds
Forward-delay time: 15 seconds
Maximum-aging time: 20 seconds
Transmit hold count: 6 BPDUs
Spanning-tree timers
Related Topics
Disabling Spanning Tree, on page 28
Supported Spanning-Tree Instances, on page 23
How to Configure Spanning-Tree Features
Changing the Spanning-Tree Mode
The switch supports three spanning-tree modes: per-VLAN spanning tree plus (PVST+), Rapid PVST+, or
multiple spanning tree protocol (MSTP). By default, the switch runs the PVST+ protocol.
If you want to enable a mode that is different from the default mode, this procedure is required.
Beginning in privileged EXEC mode, follow these steps to change the spanning-tree mode:
SUMMARY STEPS
1.
configure terminal
2.
spanning-tree mode {pvst | mst | rapid-pvst}
3.
interface interface-id
4.
spanning-tree link-type point-to-point
5.
end
6.
clear spanning-tree detected-protocols
Catalyst 2960-XR Switch Layer 2 Configuration Guide, Cisco IOS Release 15.0(2)EX1
26 OL-29424-01
Configuring Spanning Tree Protocol
How to Configure Spanning-Tree Features
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