HP 6120XG ProCurve Series 6120 Blade Switches Management and Configuration Gui - Page 255
Port Connections and Configuration, Link Connections., Port Security Restriction.
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Note Caution Port Trunking Overview Port Connections and Configuration: All port trunk links must be pointto-point connections between a switch and another switch, router, server, or workstation configured for port trunking. No intervening, non-trunking devices are allowed. It is important to note that ports on both ends of a port trunk group must have the same mode (speed and duplex) and flow control settings. Link Connections. The switch does not support port trunking through an intermediate, non-trunking device such as a hub, or using more than one media type in a port trunk group. Similarly, for proper trunk operation, all links in the same trunk group must have the same speed, duplex, and flow control. Port Security Restriction. Port security does not operate on a trunk group. If you configure port security on one or more ports that are later added to a trunk group, the switch resets the port security parameters for those ports to the factory-default configuration. To avoid broadcast storms or loops in your network while configuring a trunk, first disable or disconnect all ports you want to add to or remove from the trunk. After you finish configuring the trunk, enable or re-connect the ports. 11-3
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