Related Commands

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).

deny — configures a filter to drop packets.

permit — configures a filter to forward packets.

seq (for IPv6 ACLs)

Assign a sequence number to a deny or permit the filter in an IPv6 access list while creating the filter.

Syntax

seq sequence-number {deny permit} {ipv6-protocol-number

 

icmp ip tcp udp} {source address mask any host ipv6-

 

address} {destination address any host ipv6-address}

 

[operator port [port]] [count [byte]] [log [interval minutes]

 

[threshold-in-msgs [count]] [monitor]

 

To delete a filter, use the no seq sequence-numbercommand.

Parameters

log

(OPTIONAL) Enter the keyword log to enable the triggering

 

 

 

of ACL log messages.

 

threshold-in

(OPTIONAL) Enter the threshold-in-msgskeyword

 

msgs count

followed by a value to indicate the maximum number of ACL

 

 

logs that can be generated, exceeding which the generation

 

 

of ACL logs is terminate with the seq, permit, or deny

 

 

commands. The threshold range is from 1 to 100.

 

interval

(OPTIONAL) Enter the keyword interval followed by the

 

minutes

time period in minutes at which ACL logs must be generated.

 

 

The interval range is from 1 to 10 minutes.

 

monitor

(OPTIONAL) Enter the keyword monitor when the rule is

 

 

describing the traffic that you want to monitor and the ACL

Access Control Lists (ACL)

301

Page 301
Image 301
Dell 9.7(0.0) manual Seq for IPv6 ACLs, Icmp ip tcp udp source address mask any host ipv6, Threshold-in-msgs count monitor