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Port Monitoring
Port Monitoring is supported on platforms: c e s
Port Monitoring is supported on the E-Series ExaScale platform with FTOS 8.1.1.0 and later.
Port Monitoring is a feature that copies all incoming or outgoing packets on one port and forwards
(mirrors) them to another port. The source port is the monitored port (MD) and the destination port is the
monitoring port (MG). Port Monitoring functionality is different between platforms, but the behavior is the
same, with highlighted exceptions.
This chapter is divided into the following sections:
• Important Points to Remember on page 813
• Port Monitoring on E-Series on page 814
• Port Monitoring on C-Series and S-Series on page 816
• Configuring Port Monitoring on page 819
• Flow-based Monitoring on page 820
• Remote Port Mirroring on page 821
Important Points to Remember
• Port Monitoring is not supported on EtherScale versions of the E-Series platform.
• Port Monitoring is supported on physical ports only; VLAN and port-channel interfaces do not support
port monitoring.
• A SONET port may only be a monitored port.
• The Monitored (source, “MD”) and Monitoring ports (destination, “MG”) must be on the same switch.
• In general, a monitoring port should have
no ip address and no shutdown as the only configuration;
FTOS permits a limited set of commands for monitoring ports; display them using the command
?. A
monitoring port also may not be a member of a VLAN.
• There may only be one destination port in a monitoring session.