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).

deny (for IPv6 ACLs)

Configure a filter that drops IPv6 packets that match the filter criteria.

Syntaxdeny {ipv6-protocol-number icmp ipv6 tcp udp} [count [byte]] [dscp value] [order] [fragments] [log [interval minutes] [threshold-in-msgs [count]] [monitor]

To remove this filter, you have two choices:

•Use the no seq sequence-numbercommand syntax if you know the filter’s sequence number

•Use the no deny {ipv6-protocol-number icmp ipv6 tcp udp} command

Parameters

(OPTIONAL) Enter the keyword log to enable the triggering

log

 

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 terminated. 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 time interval range is from 1 to 10 minutes.

Access Control Lists (ACL)

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Dell 9.7(0.0) manual Deny for IPv6 ACLs