20-70
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 20 Checking Status and Connectivity
Configuring MAC Address Move Counters
MAC Address Move Counter Configuration Guidelines and Restrictions
When configuring MAC address move counters, follow these configuration guidelines and restrictions :
•
Layer 2 AISCs learn any new MAC addresses and associate them with a port. Only dynamic CAM entries
are learned.
•
MAC address moves are defined when MAC addresses move from a given port to another port in the
same VLAN.
•
The counter increments each time that an existing MAC address moves from a given port to another
port in the same VLAN.
•
For private VLANs, MAC address moves are defined as MAC addresses that move from a given port
to another port in different secondary VLANs but in the same primary VLAN.
•
The MAC address move counters feature coexists with the existing MAC address move feature when
you enter the
set cam notification move
{
enable
|
disable
} command.
•
The feature allows you to store a maximum of 1000 MAC address move counter tuples per VLAN.
When the maximum limit of 1000 tuples is exceeded, new moves that occur in that VLAN are not
recorded.
•
For proper syslog generation, you need to set the logging level for the EARL facility to 4 or higher
by entering the
set logging level earl
severity
command.
MAC Address Move Counter syslog Generation
The MAC address move counters generate the syslogs that are described in these sections:
•
Detecting MAC Address Moves, page 20-70
•
Exceeding the Maximum Limit for MAC Address Move Counters for a VLAN, page 20-71
Detecting MAC Address Moves
Table 20-4
describes the scenarios that cause the “%EARL-4-MAC_MOVE_COUNTER:Mac move(s)
detected” syslog to be generated.
Table 20-4
MAC Address Move Counter Syslog Generation
Scenario
Are MAC Address Move Counter
Syslogs Generated?
MAC address move counters have been enabled for the first time
and one or more MAC address moves occurred since the feature was
enabled.
Yes
MAC address move counters have been disabled and then enabled,
and one or more MAC address moves occurred since the feature was
enabled.
Yes
MAC address move counter entries have been cleared for all VLANs
by entering the
clear cam notification move counters all
command, and one or more MAC address moves occurred after the
entries were cleared.
Yes
