Dell C9000 series, Reference Manual

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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
[no] mac-address-table station-move threshold number interval
seconds
Parameters
threshold number 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.
interval seconds 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 Description
9.10(0.0) Introduced the Configuration Terminal Batch mode on C9010.
9.9(0.0) 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:
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