Usage

When the configured maximum threshold is exceeded, generation of logs is

Information

stopped. When the interval at which ACL logs are configured to be recorded

 

expires, the subsequent, fresh interval timer is started and the packet count for that

 

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).

Related

deny — assigns a filter to deny IP traffic.

Commands

 

 

deny udp — assigns a filter to deny UDP traffic.

deny ether-type (for Extended MAC ACLs)

Configure an egress filter that drops specified types of Ethernet packets on egress ACL supported line cards. (For more information, refer to your line card documentation).

Syntaxdeny ether-type protocol-type-number{destination-mac-addressmac-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, you have two choices:

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

•Use the no deny ether-typeprotocol-type-number {destination- mac-address mac-address-mask any} vlan vlan-id {source- mac-address mac-address-mask any} command.

Parameters

log

(OPTIONAL) Enter the keyword log to enable the triggering

 

 

 

of ACL log messages.

Access Control Lists (ACL)

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Dell 9.7(0.0) manual Deny ether-type for Extended MAC ACLs, Usage