Juniper JUNOS OS 10.3 - SOFTWARE Manual page 1672

Complete Software Guide for Junos
Configuration
CLI Quick
Configuration
Step-by-Step
Procedure
Results
Verification
Purpose
Action
1576
®
OS for EX Series Ethernet Switches, Release 10.3
A spanning tree topology contains ports that have specific roles:
The root port is responsible for forwarding data to the root bridge.
The alternate port is a standby port for the root port. When a root port goes down, the
alternate port becomes the active root port.
The designated port forwards data to the downstream network segment or device.
This configuration example uses an RSTP topology. However, you also can configure
root protection for STP or MSTP topologies at the [
level.
To configure root protection on an interface:
To quickly configure root protection on interface
and paste it into the switch terminal window:
[edit]
set protocols rstp interface ge-0/0/7 no-root-port
To configure root protection:
Configure interface ge-0/0/7
1.
[edit protocols rstp]
user@switch#
set interface ge-0/0/7 no-root-port
Check the results of the configuration:
user@switch> show configuration protocols rstp
interface ge-0/0/7.0 {
no-root-port;
}
To confirm that the configuration is working properly:
Displaying the Interface State Before Root Protection Is Triggered on page 1576
Verifying That Root Protection Is Working on the Interface on page 1577
Displaying the Interface State Before Root Protection Is Triggered
Before root protection is triggered on interface
Use the operational mode command:
user@switch> show spanning-tree interface
Spanning tree interface parameters for instance 0
Interface Port ID
edit protocols
ge-0/0/7
:
ge-0/0/7
Designated Designated
port ID bridge ID
( mstp | stp )] hierarchy
, copy the following command
, confirm the interface state.
Port State
Cost
Copyright © 2010, Juniper Networks, Inc.
Role