Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 1912

Complete Software Guide for Junos
1808
®
OS for EX Series Ethernet Switches, Release 10.4
When root protection is enabled on an interface:
The interface is blocked from becoming the root port.
Root protection is enabled for all STP instances on that interface.
The interface is blocked only for instances for which it receives superior BPDUs.
Otherwise, it participates in the spanning-tree topology.
CAUTION: An interface can be configured for either root protection or loop
protection, but not for both.
Four EX Series switches are displayed in Figure 49 on page 1809. In this example, they are
configured for RSTP and create a loop-free topology. Interface
a designated port on an administrative boundary. It connects to Switch 4. Switch 3 is the
root bridge. Interface ge-0/0/6
This example shows how to configure root protection on interface
it from transitioning to become the root port.
on Switch 1 is the root port.
Copyright © 2010, Juniper Networks, Inc.
on Switch 1 is
ge-0/0/7
to prevent
ge-0/0/7