Dell Command Line Reference Guide for the S4048–ON System 9.14.2.8

ttl

Enter the keyword ttl to deny a packet based on the time to live value. The range is from 1 to 255.

operator

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.

interval minutes

(OPTIONAL) Enter the keyword interval followed by the time period in minutes at which ACL logs must be generated. The time interval range is from 1 to 10 minutes.

By default, 10 ACL logs are generated if you do not specify the threshold explicitly.

The default frequency at which ACL logs are generated is five minutes.

This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC Networking OS Command Line Reference Guide.

Version

Description

9.12(0.0)

Introduced the ttl parameter.

9.8(0.0P5)

Introduced on the S4048-ON.

9.8(0.0P2)

Introduced on the S3048-ON.

9.3(0.0)

Added support for logging of ACLs on the S4810, S4820T, and Z9000 platforms.

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 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.

• deny — assign a filter to deny IP traffic.
• deny tcp — assign a filter to deny TCP traffic.