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Monitoring and Analyzing Switch Operation

Traffic Mirroring

Notes Booting from Software Versions Earlier than K.12.xx: If it is necessary

to boot the switch from a legacy (pre-K.12.xx) software version after using

version K.12.xx or greater to configure mirroring, remove mirroring from the

configuration before booting with the earlier software.

Maximum Supported Frame Size: The IPv4 encapsulation of mirrored

traffic adds a 54-byte header to each mirrored frame. If a resulting frame

exceeds the MTU (Maximum Transmission Unit) allowed in the path from the

mirroring source to the mirroring destination, the frame is dropped. For more

information, refer to “Maximum Supported Frame Size” on page B-68.

No Frame Truncation: Mirroring does not truncate frames, and oversized

mirroring frames will be dropped. Also, remote mirroring does not allow

downstream devices in a mirroring path to fragment mirrored frames.

Using the Menu or Web Interface To Configure Local

Mirroring

Menu and Web Interface Limits

The Menu and Web interfaces can be used to quickly configure or reconfigure

local mirroring on session 1, and allow one of the following two mirroring

source options:

■ any combination of source port(s), trunk(s), and/or a mesh

■ one static, source VLAN interface

The Menu and Web interfaces also have these limits:

■ Configure and display only session 1 and only as a local mirroring session

for traffic in both directions on the specified interface. (Selecting inbound-

only or outbound-only is not an option.)

■ If session 1 has been configured in the CLI for local mirroring for inbound-

only or outbound-only traffic on one or more interfaces, then using the

Menu or Web interface to change the session 1 configuration automati-

cally reconfigures the session to monitor both inbound and outbound

traffic on the designated interface(s).

■ If session 1 has been configured in the CLI with an ACL or as a remote

mirroring session, then the Menu and Web interfaces are not available for

changing the session 1 configuration.

■ The CLI (and SNMP) can be used to override any Menu or Web interface

configuration of session 1.

B-31

HP ProCurve Management And Configuration Guide

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