CHAPTER 66
Configuring Spanning-Tree Protocols
•
Unblocking an Interface That Receives BPDUs in Error (CLI Procedure) on page 1579
•
Configuring STP (CLI Procedure) on page 1580
•
Configuring Spanning-Tree Protocols (J-Web Procedure) on page 1580
•
Configuring VLAN Spanning Tree Protocol (CLI Procedure) on page 1584
Unblocking an Interface That Receives BPDUs in Error (CLI Procedure)
EX Series switches use bridge protocol data unit (BPDU) protection on interfaces to
prevent them from receiving BPDUs that could trigger a spanning-tree misconfiguration.
If BPDUs are received on a BPDU-protected interface, the interface transitions to a
blocking state and stops forwarding frames.
After the misconfiguration that triggered the BPDUs being sent to an interface is fixed in
the topology, the interface can be unblocked and returned to service.
To unblock an interface and return it to service using the CLI:
•
Automatically unblock an interface by configuring a timer that expires (here, the
interface is
ge-0/0/6
):
[edit ethernet-switching-options]
user@switch#
set bpdu-block
disable-timeout
30 interface ge-0/0/6
•
Manually unblock an interface using the operational mode command:
user@switch>
clear ethernet-switching bpdu-error
interface ge-0/0/6
Related
Documentation
Example: Configuring BPDU Protection on STP Interfaces to Prevent STP
Miscalculations on EX Series Switches on page 1561
•
•
Example: Configuring BPDU Protection on non-STP Interfaces to Prevent STP
Miscalculations on EX Series Switches on page 1565
•
Understanding BPDU Protection for STP, RSTP, and MSTP on EX Series Switches on
page 1522
1579
Copyright © 2010, Juniper Networks, Inc.
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 ...