Administrator Guide

------ ------ ----------- --- ---- --------- --------
0 Te 1/1 Te 1/2 rx Port N/A N/A
0 Po 10 Te 1/2 rx Port N/A N/A
Dell(conf)#monitor session 1
Dell(conf-mon-sess-1)#source vl 40 dest ten 1/3 dir rx
Dell(conf-mon-sess-1)#flow-based enable
Dell(conf-mon-sess-1)#exit
Dell(conf)#do show monitor session
SessID Source Destination Dir Mode Source IP Dest IP
------ ------ ----------- --- ---- --------- --------
0 Te 1/1 Te 1/2 rx Port N/A N/A
0 Po 10 Te 1/2 rx Port N/A N/A
1 Vl 40 Te 1/3 rx Flow N/A N/A
Note: Source as VLAN is achieved via Flow based mirroring. Please refer section Enabling Flow-Based Monitoring.
In the following example, the host and server are exchanging traffic which passes through the uplink interface 1/1. Port
1/1 is the monitored port and port 1/42 is the destination port, which is configured to only monitor traffic received on
tengigabitethernet 1/1 (host-originated traffic).
Figure 89. Port Monitoring Example
Enabling Flow-Based Monitoring
Flow-based monitoring is supported only on the S-Series 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 and egress 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 in access-list rules that include the keyword monitor. For port monitoring, Dell Networking OS only considers traffic
matching rules with the keyword monitor.
CONFIGURATION mode
Port Monitoring
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