Port Traffic Controls
Jumbo Frames
Jumbo Frames
Feature Default Menu CLI Web
display VLAN jumbo status n/a — 13-33 —
configure jumbo VLANs Disabled — 13-35 —
The Maximum Transmission Unit (MTU) is the maximum size IP frame the
switch can receive for Layer 2 frames inbound on a port. The switch drops any
inbound frames larger than the MTU allowed on the port. Ports operating at
a minimum of 10 Mbps on the ProCurve 3500 switches and 1 Gbps on the other
switches covered in this guide can accept forward frames of up to 9220 bytes
(including four bytes for a VLAN tag) when configured for jumbo traffic. You
can enable inbound jumbo frames on a per-VLAN basis. That is, on a VLAN
configured for jumbo traffic, all ports belonging to that VLAN and operating
at a minimum of 10 Mbps on the ProCurve 3500 switches and 1 Gbps on the
other switches covered in this guide allow inbound jumbo frames of up to 9220
bytes.
Switch Model Minimum Speed for Jumbo
Traffic
3500 10 Mbps
All others in this guide 1 Gbps
Terminology
Jumbo Frame: An IP frame exceeding 1522 bytes in size. The maximum
Jumbo frame size is 9220 bytes. (This size includes 4 bytes for the VLAN
tag.)
Jumbo VLAN: A VLAN configured to allow inbound jumbo traffic. All ports
belonging to a jumbo and operating at 1 Gbps or higher can receive jumbo
frames from external devices. If the switch is in a meshed domain, then
all meshed ports (operating at 1 Gbps or higher) on the switch will accept
jumbo traffic from other devices in the mesh.
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