Default Stp Configuration - Cisco Catalyst 4500 series Administration Manual

Chapter 22 Configuring STP and MST

Default STP Configuration

Table 22-4
Table 22-4
Feature
Enable state
Bridge priority value
Spanning tree port priority value (configurable on a
per-interface basis—used on interfaces configured as
Layer 2 access ports)
Spanning tree port cost (configurable on a per-interface
basis—used on interfaces configured as Layer 2 access
ports)
Spanning tree VLAN port priority value (configurable on
a per-VLAN basis—used on interfaces configured as
Layer 2 trunk ports)
Spanning tree VLAN port cost (configurable on a
per-VLAN basis—used on interfaces configured as
Layer 2 trunk ports)
Hello time
Forward delay time
Maximum aging time
Configuring STP
The following sections describe how to configure spanning tree on VLANs:
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OL-27597-01
shows the default spanning tree configuration.
Spanning Tree Default Configuration Values
Enabling STP, page 22-8
Enabling the Extended System ID, page 22-9
Configuring the Root Bridge, page 22-9
Configuring a Secondary Root Switch, page 22-12
Configuring STP Port Priority, page 22-13
Configuring STP Port Cost, page 22-15
Configuring the Bridge Priority of a VLAN, page 22-17
Configuring the Hello Time, page 22-17
Configuring the Maximum Aging Time for a VLAN, page 22-18
Configuring the Forward-Delay Time for a VLAN, page 22-19
Disabling Spanning Tree Protocol, page 22-20
Enabling Per-VLAN Rapid Spanning Tree, page 22-20
Software Configuration Guide—Release IOS XE 3.5.0SG and IOS 15.2(2)SG
Default STP Configuration
Default Value
Spanning tree enabled for all VLANs
32,768
128
10-Gigabit Ethernet: 2
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Gigabit Ethernet: 4
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Fast Ethernet: 19
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128
10-Gigabit Ethernet: 2
•
• Gigabit Ethernet: 4
• Fast Ethernet: 19
2 sec
15 sec
20 sec
22-7