Dell C1048P Port Extender Networking Command-Line Reference Guide for the C900 - Page 1314

mac-address-table station-move threshold Specify the threshold and time interval for the maximum number of station moves on PE ports. When the number of station moves for a specified MAC address exceeds the configured threshold in the configured time, a loop is detected on PE ports. The loop is prevented by bringing down the line protocol on all active ports in the learned path, except for the port with the lowest interface index (ifIndex). C9000 Series Syntax Parameters [no] mac-address-table station-move threshold number interval seconds threshold number interval seconds Enter the keyword threshold with the maximum number of times a MAC-address station move is detected within the configured interval. The range is from 5 to 50. Enter the keyword interval with the interval (in seconds). The range is from 1 to 60. Defaults Not configured. Command Modes CONFIGURATION CONFIGURATION TERMINAL BATCH Command History The following is a list of the Dell Networking OS version history for this command. Version 9.10(0.0) 9.9(0.0) Description Introduced the Configuration Terminal Batch mode on C9010. Introduced on the C1048P. Usage Information As xSTP protocols are not supported on PEs, use this command to detect possible loops on PE ports. Use this command in Configuration Terminal Batch mode to detect the possible loops in a dual-homing setup. If a station move for a MAC address is detected above the configured threshold and within the specified time, a syslog message is triggered with the port information. All ports on which the station move was detected are shut down, except for the port with the lowest interface index. Only the port with the lowest ifIndex remains active. For example: Jun 18 09:55:35: %RPM0-P:RP %MACMGR-1-PE LOOP DETECTION: Loop occurred on PE interfaces:oldInterface: peGigE 0/2/47, newInterface: peGigE 0/1/20,vlanId: 3902, macAddr: 00:aa:00:00:00: Layer 2 1314