Chapter 16
| Spanning Tree Commands
– 383 –
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
◆
If Port Loopback Detection is not enabled and a port receives it’s own BPDU,
then the port will drop the loopback BPDU according to IEEE Standard 802.1W-
2001 9.3.4 (Note 1).
◆
Port Loopback Detection will not be active if Spanning Tree is disabled on the
switch.
Example
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree loopback-detection
spanning-tree
loopback-detection
action
This command configures the response for loopback detection to block user traffic
or shut down the interface. Use the
no
form to restore the default.
Syntax
spanning-tree loopback-detection action shutdown
duration
no spanning-tree loopback-detection action
shutdown
- Shuts down the interface.
duration
- The duration to shut down the interface.
(Range: 30-86400 seconds)
Default Setting
block
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
◆
If an interface is shut down by this command, and the release mode is set to
“auto” with the
spanning-tree loopback-detection release-mode
command, the
selected interface will be automatically enabled when the shutdown interval
has expired.
◆
If an interface is shut down by this command, and the release mode is set to
“manual,” the interface can be re-enabled using the
spanning-tree
loopback-detection release
command.
Содержание EX-3524
Страница 2: ......
Страница 28: ...Figures 28 ...
Страница 34: ...Section I Getting Started 34 ...
Страница 58: ...Chapter 1 Initial Switch Configuration Setting the System Clock 58 ...
Страница 72: ...Chapter 2 Using the Command Line Interface CLI Command Groups 72 ...
Страница 156: ...Chapter 5 SNMP Commands Notification Log Commands 156 ...
Страница 164: ...Chapter 6 Remote Monitoring Commands 164 ...
Страница 218: ...Chapter 7 Authentication Commands Management IP Filter 218 ...
Страница 268: ...Chapter 8 General Security Measures Port based Traffic Segmentation 268 ...
Страница 292: ...Chapter 9 Access Control Lists ACL Information 292 ...
Страница 312: ...Chapter 10 Interface Commands Power Savings 312 ...
Страница 324: ...Chapter 11 Link Aggregation Commands Trunk Status Display Commands 324 ...
Страница 366: ...Chapter 15 Address Table Commands 366 ...
Страница 428: ...Chapter 17 VLAN Commands Configuring Voice VLANs 428 ...
Страница 572: ...Chapter 25 IP Interface Commands IPv6 Interface 572 ...
Страница 578: ...Section I Appendices 578 ...
Страница 594: ...Appendix C Customer Support Manuals 594 ...