Administrator Guide

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.
mac-source-
address-mask
Specify which bits in the MAC address must match.
The MAC ACL supports an inverse mask; therefore, a mask of ff:ff:ff:ff:ff:ff allows entries
that do not match and a mask of 00:00:00:00:00:00 only allows entries that match
exactly.
mac-destination-
address
Enter the destination MAC address and mask in nn:nn:nn:nn:nn:nn format.
mac-destination-
address-mask
Specify which bits in the MAC address must match.
The MAC ACL supports an inverse mask; therefore, a mask of ff:ff:ff:ff:ff:ff allows entries
that do not match and a mask of 00:00:00:00:00:00 only allows entries that match
exactly.
ethertype
operator
(OPTIONAL) To filter based on protocol type, enter one of the following Ethertypes:
• ev2 - is the Ethernet II frame format
• llc - is the IEEE 802.3 frame format
• snap - is the IEEE 802.3 SNAP frame format
Access Control Lists (ACL) 263