Deployment Guide

Access Control Lists (ACL) | 265
Usage
Information
When you use the log option, CP processor logs details about 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
packets’ details.
Related
Commands
Extended MAC ACL Commands
When an access-list is created without any rule and then applied to an interface, ACL behavior reflects
implicit permit.
c and s platforms support Ingress MAC ACLs only.
The following commands configure Extended MAC ACLs.
• deny
• mac access-list extended
• permit
• seq
deny
c e s
Configure a filter to drop packets that match the filter criteria.
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] [monitor]
To remove this filter, you have two choices:
• Use the no seq sequence-number command syntax if you know the filter’s sequence number or
• 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
Version 7.4.1.0
Added
monitor option
pre-Version 6.1.1.0 Introduced for E-Series
Note: When ACL logging and byte counters are configured simultaneously, byte counters
may display an incorrect value. Configure packet counters with logging instead.
deny Configure a filter to drop packets.
permit Configure a filter to forward packets.
Note: See also Commands Common to all ACL Types and Common MAC Access List
Commands.
any Enter the keyword any to drop all packets.
host mac-address Enter the keyword host followed by a MAC address to drop
packets with that host address.