Siemens Industrial Ethernet Switches SCALANCE X-200 - Manual (Page 229)

Configuration / diagnostics using remote mechanisms
6.3 Configuration using Web Based Management (WBM) and Command Line Interface (CLI)
SCALANCE X-200
Operating Instructions, 12/2011, A5E00349864-19
229
● "Source Port" display box
Shows the port that received the frame that triggered the last reaction.
● "Action" button
After the loop in the network has been eliminated, you can use this button to reset the
port again.
NOTICE
A loop is an error in the network structure that needs to be eliminated. The loop
detection can help to find the errors more quickly but does not eliminate them. The loop
detection is not suitable for increasing network availability by deliberately including
loops.
NOTICE
Loops can only be detected between devices that forward loop detection frames. Loops
via network components whose ports are set to "blocked" are not detected.
Note
Test frames create additional network load. We recommend that you only configure
individual switches, for example at branch points of the ring, as "senders" and the others
as "forwarders".
Syntax of the Command Line Interface
Table 6- 31 Loop Detection Configuration - CLI\SWITCH\LOOPD >
Command Description Comment
info Displays information about the "Loop Detection
Configuration".
loopd [E | D] Enables / disables loop detection. Administrator only.
loopdp <port>
[B | F | S]
Defines the behavior of a port for loop detection:

"Blocked"
 "Forwarder"
 "Sender"
Administrator only.
rxthres <port>
<count>
Specifies the Rx.Threshold. Administrator only.
local <port> [N |
D]
Specifies the reaction to a local loop. Administrator only.
remote <port>
[N | D]
Specifies the reaction to a remote loop. Administrator only.
reset <port> Reactivates the port if it was deactivated due to a detected
loop.
Administrator only.