User Manual

[Note]
A LAN/SFP port that is associated with a logical interface cannot be specified as ifname.
[Example]
Show information for MST instance #5.
SWP1>show spanning-tree mst instance 5
% Default: MSTI Root Path Cost 0 - MSTI Root Port 0 - MSTI Bridge Priority 32768
% Default: MSTI Root Id 800500a0deaeb920
% Default: MSTI Bridge Id 800500a0deaeb920
% ge19: Port Number 19 - Ifindex 19 - Port Id 8013 - Role Disabled - State
Discarding
% ge19: Designated Internal Path Cost 0 - Designated Port Id 0
% ge19: Configured Internal Path Cost 20000000
% ge19: Configured CST External Path cost 20000000
% ge19: CST Priority 128 - MSTI Priority 128
% ge19: Designated Root 000000a0deaeb920
% ge19: Designated Bridge 000000a0deaeb920
% ge19: Message Age 0 - Max Age 0
% ge19: Hello Time 0 - Forward Delay 0
% ge19: Forward Timer 0 - Msg Age Timer 0 - Hello Timer 0
%
11.3 Loop detection
11.3.1 Set loop detection function (system)
[Syntax]
loop-detect enable
no loop-detect
[Initial value]
loop-detect enable
[Input mode]
global configuration mode
[Description]
Enables the loop detection function for the entire system.
If this is executed with the "no" syntax, the loop detection function is disabled.
[Note]
The spanning tree function and the loop detection function can be used together on the entire system. Enabling the loop
detection function does not specify the spanning-tree shutdown command.
In order to enable the loop detection function, the loop detection function must be enabled on the interface in addition to this
command.
Even if the loop detection function is enabled, the loop detection function does not operate on the following interfaces.
• LAN/SFP port on which the spanning tree function is operating. However, because a Forwarding port transmits and receives
LDF, the loop detection will operate if misconnection or another issue causes a loop to occur.
•
LAN/SFP port that is operating as a mirror port for the mirroring function
• LAN/SFP port that is inside a logical interface
[Example]
Enable the loop detection function for the entire system.
SWP1(config)#loop-detect enable
Disable the loop detection function for the entire system.
SWP1(config)#no loop-detect
11.3.2 Set loop detection function (interface)
[Syntax]
loop-detect enable
no loop-detect
[Initial value]
Depends on VLAN preset. Refer to 3.2 Default setting values on page 20.
148
| Command Reference | L2 switching function