Dell S3100 EMC Command Line Reference Guide for the Series 9.14.2.5 - Page 287
seq (for IP ACLs
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Version 9.8(0.0P2) 9.7(0.0) 9.4(0.0) 9.3.0.0 Description Introduced on the S3048-ON. Introduced on the S6000-ON. Added support for flow-based monitoring on the S4810, S4820T, S6000, Z9000, and MXL 10/40GbE Switch IO Module platforms. Added support for logging of ACLs on the S4810, S4820T, Z9000, and MXL 10/40GbE Switch IO Module platforms. Usage Information When the configured maximum threshold is exceeded, generation of logs is 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 reenabled for this new interval. If ACL logging is stopped because the configured threshold is exceeded, it is reenabled after the logging interval period elapses. ACL logging is supported for standard and extended IPv4 ACLs, standard and extended IPv6 ACLs, and standard and extended 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). seq (for IP ACLs) Assign a sequence number to a deny or permit filter in an extended IP access list while creating the filter. Syntax Parameters seq sequence-number {deny | permit} {ip-protocol-number | icmp | ip | tcp | udp} {source mask | any | host ip-address} {destination mask | any | host ipaddress} [operator port [port]] [ttl operator] [count [byte]] [dscp value] [order] [fragments] [log [interval minutes] [threshold-in-msgs [count]] [monitor] ttl operator Enter the keyword ttl to permit or deny a packet based on the time to live value. The range is from 1 to 255. Enter one of the following logical operand: • eq(equal to) - matches packets that contain a ttl value that is equal to the specified ttl value. • neq(not equal to) - matches packets that contain a ttl value that is not equal to the specified ttl value. • gt(greater than) - matches packets that contain a ttl value that is greater than the specified ttl value. • lt (less than) - matches packets that contain a ttl value that is less than the specified ttl value. • range(inclusive range of values) - matches packets that contain a ttl value that falls between the specified range of ttl values. log (OPTIONAL) Enter the keyword log to enable the triggering of ACL log messages. threshold-in msgs count (OPTIONAL) Enter the threshold-in-msgs keyword 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.. Access Control Lists (ACL) 287
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