new interval commences from zero. If ACL logging was stopped previously
because the configured threshold is exceeded, it is re-enabled for this new interval.
If ACL logging is stopped because the configured threshold is exceeded, it is re-
enabled after the logging interval period elapses. ACL logging is supported for
standard and extended IPv4 ACLs, IPv6 ACLs, and MAC ACLs. You can configure
ACL logging only on ACLs that are applied to ingress 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).
NOTE: When ACL logging and byte counters are configured simultaneously,
byte counters may display an incorrect value. Configure packet counters with
logging instead.
seq ether-type
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.
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
sequence-
number
Enter a number from 0 to 4294967290.
deny
Enter the keyword
deny
to drop all traffic meeting the filter
criteria..
permit
Enter the keyword
permit
to forward all traffic meeting the
filter criteria.
260
Access Control Lists (ACL)
