HP 6120XG ProCurve Series 6120 Blade Switches Management and Configuration Gui - Page 454

Caution Monitoring and Analyzing Switch Operation Traffic Mirroring Troubleshooting Mirroring Mirrored traffic does not reach configured remote destination switch or remote exit port. • For a given mirroring session, the mirror command parameters configured on the source switch for source IP address, source UDP port, and destination IP address must be identical to their counterparts in the mirror endpoint command configured on the destination switch. • The configured exit port must not be a member of a trunk. • If the destination for mirrored traffic is on a different VLAN than the source, routing must be correctly configured along the path from the source to the destination. • On the destination switch for a given mirroring session, both the port on which the mirrored traffic enters the switch and the exit port must be members of the same VLAN. • All links on the path from the source switch to the destination switch must be active. A mirroring exit port should be connected only to a network analyzer, IDS, or other network edge device that has no connection to other network resources. Allowing a mirroring exit port connection to a network can result in serious network performance problems, and is strongly discouraged by ProCurve Networking. B-47