network outages by triggering an STP miscalculation. Enable BPDU protection on those
interfaces that should not receive BPDUs to prevent network outages.
BPDU protection for non-STP interfaces can be enabled on interfaces on a non-STP
switch connected to an STP switch through a trunk interface. Enable BPDU protection
on interfaces on which no BPDUs are expected, such as access ports connected to user
devices. If BPDUs are received on a BPDU-protected interface, the interface transitions
to a blocking state and stops forwarding frames.
Two EX Series switches are displayed in Figure 38 on page 1566. In this example, Switch 1
and Switch 2 are connected through a trunk interface. Switch 1 is configured for RSTP,
but Switch 2 has no spanning tree. Switch 2 has two access ports: interface
ge-0/0/5
and interface
ge-0/0/6
.
This example shows you how to configure BPDU protection on interface
ge-0/0/5
and
interface
ge-0/0/6
. When BPDU protection is enabled, the interfaces will transition to
a blocking state if BPDUs are received.
Figure 38: BPDU Protection Topology
Table 218 on page 1566 shows the components that will be configured for BPDU protection.
Table 218: Components of the Topology for Configuring BPDU Protection on EX Series Switches
Settings
Property
Switch 1 is connected to Switch 2 through a trunk interface. Switch 1 is configured
for RSTP.
Switch 1 (Distribution Layer)
Copyright © 2010, Juniper Networks, Inc.
1566
Complete Software Guide for Junos
®
OS for EX Series Ethernet Switches, Release 10.3
Summary of Contents for JUNOS OS 10.3 - SOFTWARE
Page 325: ...CHAPTER 17 Operational Mode Commands for System Setup 229 Copyright 2010 Juniper Networks Inc ...
Page 1323: ...CHAPTER 56 Operational Mode Commands for Interfaces 1227 Copyright 2010 Juniper Networks Inc ...
Page 2841: ...CHAPTER 86 Operational Commands for 802 1X 2745 Copyright 2010 Juniper Networks Inc ...
Page 3367: ...CHAPTER 113 Operational Mode Commands for CoS 3271 Copyright 2010 Juniper Networks Inc ...
Page 3435: ...CHAPTER 120 Operational Mode Commands for PoE 3339 Copyright 2010 Juniper Networks Inc ...
Page 3529: ...CHAPTER 126 Operational Mode Commands for MPLS 3433 Copyright 2010 Juniper Networks Inc ...