Users Guide

interfaces; you cannot enable logging for ACLs that are associated with egress
interfaces.
You can activate flow-based monitoring for a monitoring session by entering the flow-
based enable command in the Monitor Session mode. When you enable this capability,
traffic with particular flows that are traversing through the ingress and egress interfaces
are examined and, appropriate ACLs can be applied in both the ingress and egress
direction. Flow-based monitoring conserves bandwidth by monitoring only specified
traffic instead all traffic on the interface. This feature is particularly useful when looking
for malicious traffic. It is available for Layer 2 and Layer 3 ingress and egress traffic. You
may specify traffic using standard or extended access-lists. This mechanism copies all
incoming or outgoing packets on one port and forwards (mirrors) them to another
port. The source port is the monitored port (MD) and the destination port is the
monitoring port (MG).
seq ether-type (for Extended MAC
ACLs)
Configure an egress filter with a specific sequence number that filters traffic with specified types of Ethernet
packets. This command is supported only on 12-port GE line cards with SFP optics. For specifications, refer to
your line card documentation.
NOTE: Only the options that have been newly introduced in Release 9.3(0.0) and Release 9.4(0.0) are
described here. For a complete description on all of the keywords and variables that are available with this
command, refer the topic of this command discussed earlier in this guide.
Syntax
seq sequence-number {deny | permit} ether-type protocol-type-
number {destination-mac-address mac-address-mask | any} vlan vlan-
id {source-mac-address mac-address-mask | any} [count [byte]]
[order] [log [interval minutes] [threshold-in-msgs [count]]
[monitor]
To remove this filter, use the no seq sequence-number command.
Parameters
log (OPTIONAL) Enter the keyword log to enable the triggering of
ACL log messages.
threshold-in msgs
count
(OPTIONAL) Enter the threshold-in-msgs keyword followed
by a value to indicate the maximum number of ACL logs that
can be generated, exceeding which the generation of ACL logs
is terminated. with the seq, permit, or deny commands. You can
enter a threshold in the range of 1-100.
interval minutes (OPTIONAL) Enter the keyword interval followed by the time
period in minutes at which ACL logs must be generated. You can
enter an interval in the range of 1-10 minutes.
Access Control Lists (ACL) 382