Hp 2910AL User Manual download pdf (Page 319)

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101

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, jumbo-

enabled 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 13-13.

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Hp 2910AL User Manual Page 319

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