Administrator Guide

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 MAC ACL filter to drop packets.
seq — configure a MAC ACL filter with a specified sequence number.
seq
Configure a filter with a specific sequence number.
C9000 Series
Syntax
seq sequence-number {deny | permit} {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 delete a filter, use the no seq sequence-number command.
Parameters
sequence-
number
Enter a number as the filter sequence number. The range is from zero (0) to
65535.
deny Enter the keyword deny to drop any traffic matching this filter.
permit Enter the keyword permit to forward any traffic matching this filter.
any Enter the keyword any to filter all packets.
host mac-
address
Enter the keyword host and then enter a MAC address to filter packets with that
host address.
mac-source-
address
Enter a MAC address in nn:nn:nn:nn:nn:nn format.
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-source-
address-mask
Specify which bits in the MAC address must be matched.
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 be matched.
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.
count (OPTIONAL) Enter the keyword count to count packets the filter processes.
byte (OPTIONAL) Enter the keyword byte to count bytes the filter processes.
276 Access Control Lists (ACL)