Figure 38: Bpdu Protection Topology - Juniper JUNOS OS 10.3 - SOFTWARE Manual

Complete Software Guide for Junos
Table 218: Components of the Topology for Configuring BPDU Protection on EX Series Switches
Property
Switch 1 (Distribution Layer)
1566
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OS for EX Series Ethernet Switches, Release 10.3
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
and interface .
ge-0/0/6
This example shows you how to configure BPDU protection on interface
interface . When BPDU protection is enabled, the interfaces will transition to
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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.
Settings
Switch 1 is connected to Switch 2 through a trunk interface. Switch 1 is configured
for RSTP.
ge-0/0/5
ge-0/0/5
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