Reference Guide

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 100. 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
ip access-list
Refer to Access Control Lists (ACLs).
Port Monitoring
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