Command Line Reference Guide

logging for ACLs that are associated with egress 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).
Related
Commands
permit – assigns a permit filter for IP packets.
permit tcp – assigns a permit filter for TCP packets.
permit tcp
Configure a filter to pass TCP packets that match the filter criteria.
Syntax
permit tcp {source address mask | any | host ipv6-address}
[operator port [port]] {destination address | any | host ipv6-
address} [bit] [operator port [port]] [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 permit tcp {source address mask | any | host ipv6-
address} {destination address | any | host ipv6-address}
command.
Parameters
source address Enter the IPv6 address of the network or host from which the
packets were sent in the x:x:x:x::x format followed by the
prefix length in the /x format. The range is /0 to /128. The ::
notation specifies successive hexadecimal fields of zero.
mask Enter a network mask in /prefix format (/x).
any Enter the keyword any to specify that all routes are subject
to the filter.
host ipv6-
address
Enter the keyword host followed by the IPv6 address of the
host in the x:x:x:x::x format. The :: notation specifies
successive hexadecimal fields of zero.
Access Control Lists (ACL)
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