Download 6 Switch Stack System

Chapter 4 Interface Configuration
Step Command
Function
2
This configures the loopback
detection of Vlan in one port.
ZXR10(config)#loop-detect interface <port-name>
vlan <vlan-id>[enable | disable]
3
ZXR10(config)#loop-detect protect-interface
<port-name><enable | disable>
This configures the loopback
detection port interface.
When a switch detects
a loopback of one port,
switch deal with it
according to parameter
protect-interface. When
parameter protect-interface
is enable, switch sets a
alarm it has detected a
loopback but there will be
no operation. When the
parameter protect-interface
is disable, the switch will
shutdown the port. After
enabling loopback detection,
the default parameter
protect-interface is disable.
4
ZXR10(config)#loop-detect reopen-time <interval>
This configures the
reopen-time when the port
was shut down as a result of
loopback detection.
5
ZXR10(config)#show loop-detect interface
This enables the loopback
detection function.
6
ZXR10(config)#show loop-detect interface-detail
This displays detail of port
which enables loopback
detection.
<port-name>
7
ZXR10(config)#show loop-detect protect-interface
This displays the port which
enables loopback detection
protection.
8
ZXR10(config)#show loop-detect reopen-time
This displays the reopen-time
when one port has been
shutdown in result of loopback
detection.
Port Loop Detection Example
As shown in Figure 17, port gei_1/3 is connected to a computer,
telnet into the switch A. Port gei_1/1 is in Vlan1 and Vlan2. Enable
loopback detection in port gei_1/1. Loopback detection is done in
Vlan1 and Vlan2 at the same time. Switch A is connected to Switch
B with gei_1/1 port. Switch B shuts spanning-tree protocol and
loop two ports with one network line. The two ports in loop and
the port which connect to switch are in the same Vlans as gei_1/1.
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