Cisco Catalyst 2960-XR Configuration Guide

Configuring the Root Switch
This procedure is optional.
Beginning in privileged EXEC mode, follow these steps to configure the root switch.
Before You Begin
A multiple spanning tree (MST) must be specified and enabled on the switch. For instructions, see Related
Topics.
You must also know the specified MST instance ID. Step 2 in the example uses 0 as the instance ID because
that was the instance ID set up by the instructions listed under Related Topics.
SUMMARY STEPS
1.
configure terminal
2.
spanning-tree mst instance-id root primary
3.
end
DETAILED STEPS
PurposeCommand or Action
Enters the global configuration mode.configure terminal
Example:
Switch# configure terminal
Step 1
Configures a switch as the root switch.
spanning-tree mst instance-id root primary
Step 2
Example:
Switch(config)# spanning-tree mst 0 root
primary
For instance-id, you can specify a single instance, a range of
instances separated by a hyphen, or a series of instances
separated by a comma. The range is 0 to 4094.
Returns to privileged EXEC mode.end
Example:
Switch(config)# end
Step 3
Related Topics
Root Switch, on page 44
Specifying the MST Region Configuration and Enabling MSTP, on page 59
Restrictions for MSTP, on page 42
Bridge ID, Device Priority, and Extended System ID, on page 17
Catalyst 2960-XR Switch Layer 2 Configuration Guide, Cisco IOS Release 15.0(2)EX1
62 OL-29424-01
Configuring Multiple Spanning-Tree Protocol
Configuring the Root Switch

Cisco Catalyst 2960-XR Specifications

General

Stacking Bandwidth	80 Gbps
Layer Support	Layer 2 and Layer 3
Jumbo Frame Support	9198 bytes
RAM	512 MB
Input Voltage	100-240V AC
Model	Catalyst 2960-XR
Uplink Interfaces	4 x 1G SFP or 2 x 10G SFP+
Downlink Interfaces	24 or 48 x Gigabit Ethernet ports
Power Supply	Internal
MAC Address Table Size	16, 000 entries
PoE	Available on PoE models
Weight	4.5 kg
Features	energy efficiency
Stacking	Up to 8 switches
Operating Temperature	0 to 45°C