Dell PowerConnect J-EX4200-24T Software Manual page 1403

Table 176: Components of the Topology for Configuring Root Protection on J-EX Series Switches
Property
Switch 1
Switch 2
Switch 3
Switch 4
Configuration
CLI Quick
Configuration
Step-by-Step
Procedure
Results
Table 176 on page 1331 shows the components that will be configured for root protection.
Settings
Switch 1 is connected to Switch 4 through interface
Switch 2 is connected to Switch 1 and Switch 3. Interface
RSTP topology.
Switch 3 is the root bridge and is connected to Switch 1 and Switch 2.
Switch 4 is connected to Switch 1. After loop protection is configured on interface
Switch 4 will send superior BPDUs that will trigger loop protection on interface
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;
}
Chapter 65: Examples of Spanning-Tree Protocols Configuration
ge-0/0/7 .
ge-0/0/4
edit protocols
ge-0/0/7 , copy the following command
:
is the alternate port in the
,
ge-0/0/7
.
ge-0/0/7
( | )] hierarchy
mstp stp
1331