Example: Configuring Bpdu Protection On Edge Interfaces To Prevent Stp Miscalculations; Using Bpdu Protection, Root Protection, And Loop Protection - Juniper EX9200 Features Manual

Related
Documentation
Example: Configuring BPDU Protection on Edge Interfaces to Prevent STP
Miscalculations
Requirements
Copyright © 2017, Juniper Networks, Inc.
Include the
disable-timeout
hierarchy level to enable the interfaces to automatically return to service
bpdu-block]
when the specified timer expires.
Issue the operational mode command
On EX Series switches running Junos OS that does not support the ELS configuration
style:
Include the
disable-timeout
bpdu-block] hierarchy level to enable the interfaces to automatically return to service
when the specified timer expires.
Issue the operational mode command
Configuring BPDU Protection on Spanning Tree Interfaces on page 230
EX Series and QFX Series switches provide Layer 2 loop prevention through Rapid
Spanning Tree protocol (RSTP) and Multiple Spanning Tree Protocol (MSTP). All
spanning-tree protocols use a special type of frame called a bridge protocol data unit
(BPDU) to communicate. Other devices—PC bridging applications, for example, also use
BPDUs and generate their own BPDUs. These different BPDUs are not compatible. When
BPDUs generated by spanning-tree protocols are transmitted to a device that uses
another type of BPDU, they can cause problems on the device. Similarly, if switches within
a spanning-tree topology receive BPDUs from other devices, network outages can occur
because of STP miscalculations.
This example configures BPDU protection on an EX Series switch that uses RSTP. The
upstream configuration is done on the edge interfaces, where outside BPDUs are often
received from other devices:
Requirements on page 219
Overview and Topology on page 220
Configuration on page 221
Verification on page 222
This example uses the following software and hardware components:
Two EX Series switches in an RSTP topology
Junos OS Release 13.2X50-D10 or later or later for EX Series or QFX Series switches
Chapter 10: Using BPDU Protection, Root Protection, and Loop Protection
statement at the
[edit protocols layer2-control
clear error bpdu interface
statement at the [edit ethernet-switching-options
clear bpdu-error
on the switch.
on the switch.
219