Related Commands

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).

ip access-list extended — creates an extended ACL.

permit — assigns a permit filter for IP packets.

permit tcp — assigns a permit filter for TCP packets.

permit (for Extended IP ACLs)

To pass IP packets meeting the filter criteria, configure a filter.

Syntaxpermit {source mask any host ip-address} {destination mask

any host ip-address} [count [bytes]] [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 if you know the filter’s sequence number.

•Use the no deny {source mask any host ip-address} {destination mask any host ip-address} 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 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

 

in which you are creating the rule is applied to the monitored

 

interface.

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Access Control Lists (ACL)

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Dell 9.7(0.0) manual Permit for Extended IP ACLs, Related Commands