Administrator Guide
Version Description
8.1.1.0 Introduced on the E-Series ExaScale.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
7.4.1.0 Added the monitor option.
6.1.1.0 Introduced on the E-Series.
Usage
Information
When you use the log option, the CP processor logs detail the packets that match. Depending on how
many packets match the log entry and at what rate, the CP may become busy as it has to log these
packet details.
By default, 10 ACL logs are generated if you do not specify the threshold explicitly. The default frequency
at which ACL logs are generated is five minutes. By default, flow-based monitoring is not enabled.
Use the monitor option only when you are using flow-based monitoring. For more information, refer to
the Port Monitoring chapter in the C9000 Series Configuration Guide.
NOTE: When ACL logging and byte counters are configured simultaneously, byte counters may
display an incorrect value. Configure packet counters with logging instead.
Related
Commands
deny — configures a filter to drop packets.
permit — configures a filter to forward packets.
Extended MAC ACL Commands
The following commands configure Extended MAC ACLs. The C9000 supports both Ingress and Egress MAC ACLs.
When an access-list is created without any rule and then applied to an interface, ACL behavior reflects implicit permit.
NOTE:
For more information, also refer to the Commands Common to all ACL Types and Common MAC Access List
Commands sections.
deny
To drop packets that match the filter criteria, configure a filter.
C9000 Series
Syntax
deny {any | host mac-address | mac-source-address mac-source-address-mask}
{any | host mac-address | mac-destination-address mac-destination-address-
mask} [ethertype-operator] [count [byte]] [log [interval minutes]
[threshold-in-msgs [count]] [monitor]
To remove this filter, you have two choices:
● Use the no seq sequence-number command if you know the filter’s sequence number.
● Use the no deny {any | host mac-address | mac-source-address mac-source-
address-mask} {any | host mac-address | mac-destination-address mac-
destination-address-mask} command.
Parameters
any Enter the keyword any to drop all packets.
host
mac-
address
Enter the keyword host and then enter a MAC address to drop packets with that
host address.
mac-source-
address
Enter a MAC address in nn:nn:nn:nn:nn:nn format.
Access Control Lists (ACL) 271