Default Stp Configuration - Cisco Catalyst 4500 Series Software Configuration Manual

Chapter 23 Configuring STP and MST

Default STP Configuration

Table 23-4
Table 23-4
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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shows the default spanning tree configuration.
Spanning Tree Default Configuration Values
Enabling STP, page 23-8
Enabling the Extended System ID, page 23-9
Configuring the Root Bridge, page 23-9
Configuring a Secondary Root Switch, page 23-12
Configuring STP Port Priority, page 23-13
Configuring STP Port Cost, page 23-15
Configuring the Bridge Priority of a VLAN, page 23-17
Configuring the Hello Time, page 23-17
Configuring the Maximum Aging Time for a VLAN, page 23-18
Configuring the Forward-Delay Time for a VLAN, page 23-19
Disabling Spanning Tree Protocol, page 23-20
Enabling Per-VLAN Rapid Spanning Tree, page 23-20
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Default STP Configuration
Default Value
Spanning tree enabled for all VLANs
32,768
128
10-Gigabit Ethernet: 2
•
Gigabit Ethernet: 4
•
Fast Ethernet: 19
•
128
10-Gigabit Ethernet: 2
•
• Gigabit Ethernet: 4
• Fast Ethernet: 19
2 sec
15 sec
20 sec
23-7