19-8
Cisco ME 3800X and 3600X Switch Software Configuration Guide
OL-23400-01
Chapter 19 Configuring Traffic Control
Configuring EVC MAC Security
You can configure the EFP for one of three violation modes, based on the action to be taken if a violation
occurs:
•
protect—when the number of secure MAC addresses reaches the maximum limit allowed on the
EFP, packets with unknown source addresses are dropped until you remove a sufficient number of
secure MAC addresses to drop below the maximum value or increase the number of maximum
allowable addresses. You are not notified that a security violation has occurred.
•
restrict—when the number of secure MAC addresses reaches the maximum limit allowed on the
EFP, packets with unknown source addresses are dropped until you remove a sufficient number of
secure MAC addresses to drop below the maximum value or increase the number of maximum
allowable addresses. In this mode, you are notified that a security violation has occurred. An SNMP
trap is sent, a syslog message is logged, and the violation counter increments.
•
shutdown—a MAC security violation causes the EFP service instance to become error-disabled and
to shut down immediately. An SNMP trap is sent, a syslog message is logged, and the violation
counter increments. When a secure EFP is in the error-disabled state, you can manually re-enable it
using clear ethernet service instance number interface interface-id privileged EXEC command or
entering the shutdown and no shutdown service instance configuration commands. This is the
default mode.
Table 19-1
shows the violation mode and the actions taken when you configure a secure EFP.
Default EVC MAC Security Configuration
Table 19-1
Security Violation Mode Actions
Violation Mode
Traffic is
forwarded
1
1.
Packets with unknown source addresses are dropped until you remove a sufficient number of secure MAC addresses.
Sends SNMP
trap
Sends syslog
message
Displays error
message
2
2.
The switch returns an error message if you manually configure an address that would cause a security violation.
Violation
counter
increments
Shuts down port
protect
No
No
No
No
No
No
restrict
No
Yes
Yes
No
Yes
No
shutdown
No
Yes
Yes
No
Yes
Yes
Table 19-2
Default EVC MAC Security Configuration
Feature
Default Setting
EVC MAC security
Disabled on an EFP.
Sticky address learning
Disabled.
Maximum number of secure
MAC addresses per EFP
1.
Violation mode
Shutdown. The service instance shuts down when the maximum
number of secure MAC addresses is exceeded.
MAC security aging
Disabled. Aging time is 0.
Static aging is disabled.
