HP 6120XG ProCurve Series 6120 Blade Switches Management and Configuration Gui - Page 339
Operating Rules, Required Port Speed, Switch Meshing, GVRP Operation, Port Adds and Moves
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Port Traffic Controls Jumbo Frames Operating Rules ■ Required Port Speed: This feature allows inbound and outbound jumbo frames on ports operating at speeds of 1 gigabit or higher. At lower port speeds, only standard (1522-byte or smaller) frames are allowed, regard less of the jumbo configuration. ■ Switch Meshing: If you enable jumbo traffic on a VLAN, then all meshed ports on the switch will be enabled to support jumbo traffic. (On a given meshed switch, every meshed port operating at 1 Gbps or higher becomes a member of every VLAN configured on the switch.) ■ GVRP Operation: A VLAN enabled for jumbo traffic cannot be used to create a dynamic VLAN. A port belonging to a statically configured, jumboenabled VLAN cannot join a dynamic VLAN. ■ Port Adds and Moves: If you add a port to a VLAN that is already configured for jumbo traffic, the switch enables that port to receive jumbo traffic. If you remove a port from a jumbo-enabled VLAN, the switch disables jumbo traffic capability on the port only if the port is not currently a member of another jumbo-enabled VLAN. This same operation applies to port trunks. ■ Jumbo Traffic Sources: A port belonging to a jumbo-enabled VLAN can receive inbound jumbo frames through any VLAN to which it belongs, including non-jumbo VLANs. For example, if VLAN 10 (without jumbos enabled) and VLAN 20 (with jumbos enabled) are both configured on a switch, and port 1 belongs to both VLANs, then port 1 can receive jumbo traffic from devices on either VLAN. For a method to allow only some ports in a VLAN to receive jumbo traffic, refer to "Configuring a Maximum Frame Size" on page 12-25. 12-21
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