Administrator Guide

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 ether-type (for Extended MAC ACLs)
Configure an egress filter with a specific sequence number that filters traffic with specified types of Ethernet packets. This
command is supported only on 12-port GE line cards with SFP optics. For specifications, refer to your line card documentation.
NOTE: Only the options that have been newly introduced in Release 9.3(0.0) and Release 9.4(0.0) are described here. For
a complete description on all of the keywords and variables that are available with this command, refer the topic of this
command discussed earlier in this guide.
Syntax
seq sequence-number {deny | permit} ether-type protocol-type-number
{destination-mac-address mac-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, use the no seq sequence-number command.
Parameters
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.
You can enter a threshold in the range of 1-100.
interval minutes (OPTIONAL) Enter the keyword interval followed by the time period in minutes
at which ACL logs must be generated. You can enter an interval in the range of 1-10
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.
Defaults
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 5 minutes. By default, flow-based monitoring is
not enabled.
Command Modes CONFIGURATION-EXTENDED-ACCESS-LIST
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
Version Description
9.10(0.0) Introduced on the S3148.
9.8(2.0) Introduced on the S3100 series.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000–ON.
9.4(0.0) Added support for flow-based monitoring on the S4810, S4820T, S6000, Z9000,
and MXL 10/40GbE Switch IO Module platforms.
294 Access Control Lists (ACL)