Administrator Guide

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.
Topics:
• Port Monitoring
• Remote Port Mirroring
• Encapsulated Remote Port Monitoring
• Port Monitoring on VLT
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 PE Gigabit Ethernet interface
peTenGigE PE TenGigabit Ethernet 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 PE Gigabit Ethernet interface
peTenGigE PE TenGigabit Ethernet 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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742 Port Monitoring