No-Root-Port - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

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no-root-port

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Copyright © 2010, Juniper Networks, Inc.
show spanning-tree bridge on page 1878
show spanning-tree interface on page 1887
Example: Configuring Network Regions for VLANs with MSTP on EX Series Switches
on page 1775
Understanding MSTP for EX Series Switches on page 1755
no-root-port;
[edit protocols mstp interface (all | interface-name)],
[edit protocols rstp interface (all | interface-name)],
[edit protocols stp interface (all | interface-name)],
[edit protocols vstp vlan vlan-id interface (all | interface-name)]
Statement introduced in Junos OS Release 9.1 for EX Series switches.
Statement updated in Junos OS Release 9.4 for EX Series switches to add VSTP support.
Configure an interface to be a spanning tree designated port. If the bridge receives superior
STP bridge protocol data units (BPDUs) on a root-protected interface, that interface
transitions to a root-prevented STP state (inconsistency state) and the interface is
blocked. This blocking prevents a bridge that should not be the root bridge from being
elected the root bridge. When the bridge stops receiving superior STP BPDUs on the
root-protected interface, interface traffic is no longer blocked.
routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.
show spanning-tree bridge on page 1878
show spanning-tree interface on page 1887
Example: Configuring Root Protection to Enforce Root Bridge Placement in Spanning
Trees on EX Series Switches on page 1807
Example: Configuring Network Regions for VLANs with MSTP on EX Series Switches
on page 1775
Example: Configuring Faster Convergence and Improving Network Stability with RSTP
on EX Series Switches on page 1761
Understanding VSTP for EX Series Switches on page 1760
Chapter 74: Configuration Statements for Spanning-Tree Protocols
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