User Manual UMN:CLI
V5808
313
8.3.11 Restarting Protocol Migration
MSTP protocol has a backward compatibility. MSTP is compatible with STP and RSTP. If
some other bridge runs on STP mode and sends the BPDU version of STP or RSTP,
MSTP automatically changes to STP mode. But STP mode cannot be changed to MSTP
mode automatically. If administrator wants to change network topology to MSTP mode,
administrator has to clear the previously detected detected protocol manually.
To prevent this, the V5808 provides the clear spanning-tree detected-protocols
command. If you enable this command, the switch checks STP protocol packet once
again. To clear configured Restarting Protocol Migration, use the following command.
clear spanning-tree detected-
protocols
Restarts protocol migration function.
clear spanning-tree port PORTS
detected-protocols
Restarts protocol migration function of specified port:
PORTS: port number
8.3.12 Loop Back Detection
The problem occurs because the keepalive packet is looped back to the port that sent the
keepalive. Keepalives are sent on the switches in order to prevent loops in the network.
You see this problem on the device that detects and breaks the loop, but not on the
device that causes the loop.
To enable error-disable detection for loop back cause, use the following command.
errdisable detect cause loopback
Enables error-disable detection for loop
back cause
no errdisable detect cause loopback
Disables error-disable detection for loop
back cause
To display the status of error-disable cause, use the following command.
show errdisable detect cause
Shows status of error-disable causes
To enable/disable the error-disable recovery function for loop back cause, use the
following command.
errdisable recovery cause loopback
Enables the recovery function for loop
back error-disable cause
no errdisable recovery cause loopback
Disables the recovery function for loop
back error-disable cause
To specify the time to recover from a specified error-disable cause, use the following
To Next Page
Loading...