Users Guide

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Port Monitoring
Port monitoring (also referred to as mirroring) allows you to monitor ingress and/or egress traffic on
specified ports. The mirrored traffic can be sent to a port to which a network analyzer is connected to
inspect or troubleshoot the traffic.
The Dell Networking OS supports the following mirroring techniques:
• Port monitoring — Monitors network traffic by forwarding a copy of incoming and outgoing packets
from a source port to a destination port on the same network router.
• Remote port monitoring (RPM) — Monitors traffic on a remote device in the network. Mirrored traffic
is sent over the L2 network to a destination port, where a probe device can analyze it. RPM is an
extension of the port monitoring feature.
• Encapsulated remote-port monitoring (ERPM) — Encapsulates mirrored packet using GRE tunneling
over an IP routed network.
Port Monitoring
The switch supports multiple source-destination statements in a single monitor session.
The maximum number of source ports that can be supported in a session is 128.
The maximum number of destination ports that can be supported is 3 per port pipe.
Dell(conf)#monitor session 0 type rpm
Dell(conf-mon-sess-0)#source ?
fortyGigE FortyGigabit Ethernet interface
peGigE Port Extender interface
port-channel Port-channel interface
range Configure interface range
remote-vlan Remote-Port-Mirroring vlan
tengigabitethernet TenGigabit Ethernet interface
vlan VLAN Monitoring
Dell(conf-mon-sess-0)#source range ?
fortyGigE FortyGigabit Ethernet interface
peGigE Port Extender interface
port-channel Port-channel interface
tengigabitethernet TenGigabit Ethernet interface
vlan VLAN Monitoring
Example of Viewing a Monitoring Session
Given these parameters, the following illustration shows the possible port monitoring configurations on
the switch.
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Port Monitoring