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Port Traffic Controls
Jumbo Frames
Displaying the Maximum Frame Size
Use the show jumbos command to display the globally configured untagged
maximum frame size for the switch.
ProCurve(config)# show jumbos
Jumbos Global Values
Configured : MaxFrameSize : 9216 Ip-MTU : 9198
In Use : MaxFrameSize : 9216 Ip-MTU : 9198
Figure 14. Displaying the Maximum Frame Size and IP MTU Values
Operating Notes for Maximum Frame Size
■ When you set a maximum frame size for Jumbo frames, it must be on
a global level. You cannot use the jumbo max-frame-size command on
a per-port or per-VLAN basis.
■ The original way to configure Jumbo frames remains the same, which
is per-VLAN, but you cannot set a maximum frame size per-VLAN.
■ Jumbo support must be enabled for a VLAN from the CLI or through
SNMP.
■ Setting the maximum frame size does not require a reboot.
■ When you upgrade to a version of software that supports setting the
maximum frame size from a version that did not, the max-frame-size
value is set automatically to 9216 bytes.
■ Configuring a Jumbo maximum frame size on a VLAN allows frames
up to max-frame-size even though other VLANs of which the port is a
member are not enabled for Jumbo support.
Operating Notes for Jumbo Traffic-Handling
■ ProCurve does not recommend configuring a voice VLAN to accept jumbo
frames. Voice VLAN frames are typically small, and allowing a voice VLAN
to accept jumbo frame traffic can degrade the voice transmission perfor-
mance.
■ You can configure the default, primary, and/or (if configured) the manage-
ment VLAN to accept jumbo frames on all ports belonging to the VLAN.
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