Deployment Guide

The port mirroring application maintains a database that contains all monitoring sessions (including port monitor sessions). It
has information regarding the sessions that are enabled for flow-based monitoring and those sessions that are not enabled for
flow-based monitoring. It downloads monitoring configuration to the ACL agent whenever the ACL agent is registered with the
port mirroring application or when flow-based monitoring is enabled.
The show monitor session session-id command displays the Type field in the output, which indicates whether a
particular session is enabled for flow-monitoring.
Example Output of the show Command
DellEMC# show monitor session 1
SessID Source Destination Dir Mode Source IP Dest IP
DSCP TTL Drop Rate Gre-Protocol FcMonitor
------ ------ ----------- --- ---- --------- --------
---- --- ---- ---- ----------- ---------
1 Te 1/2/1 remote-ip rx Port 0.0.0.0 0.0.0.0 0
0 No N/A N/A yes
DellEMC#
The show config command has been modified to display monitoring configuration in a particular session.
Example Output of the show Command
(conf-mon-sess-11)#show config
!
monitor session 11
flow-based enable
source twentyFiveGigE 1/1 destination twentyFiveGigE 1/1 direction both
The show ip accounting commands have been enhanced to display whether monitoring is enabled for traffic that matches
with the rules of the specific ACL.
Example Output of the show Command
DellEMC# show ip accounting access-list
!
Extended Ingress IP access list kar on TenGigabitEthernet 1/1/1
Total cam count 1
seq 5 permit ip 192.168.20.0/24 173.168.20.0/24 monitor
DellEMC#show ipv6 accounting access-list
!
Ingress IPv6 access list kar on TenGigabitEthernet 1/1/1
Total cam count 1
seq 5 permit ipv6 22::/24 33::/24 monitor
Enabling Flow-Based Monitoring
Flow-based monitoring is supported on the platform.
Flow-based monitoring conserves bandwidth by monitoring only specified traffic instead of 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 traffic. You can
specify traffic using standard or extended access-lists.
1. Enable flow-based monitoring for a monitoring session.
MONITOR SESSION mode
flow-based enable
2. Define access-list rules that include the keyword monitor. Dell Networking OS only considers port monitoring traffic that
matches rules with the keyword monitor.
CONFIGURATION mode
ip access-list
For more information, see Access Control Lists (ACLs).
3. Apply the ACL to the monitored port.
INTERFACE mode
ip access-group access-list
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Access Control Lists (ACLs)