A9782A & A9784A PCI-X 2 Gigabit Fibre Channel and Gigabit Ethernet Combination Card Installation Guide

OpenVMS Installation
Optional Step: Jumbo Frames Size
Chapter 2
21
Optional Step: Jumbo Frames Size
NOTE Jumbo Frames Size (Jumbo frames are supported only at 1000 Mbit/s
Jumbo frames for the LAN driver on OpenVMS V8.2 have an mtu_size in the range of 1518-9018 bytes.
Jumbo frames are enabled system-wide by setting bit 6 in the system parameter LAN_FLAGS. To enable
jumbo frames on individual devices, use the LANCP command SET DEVICE/JUMBO. To disable jumbo
frames, use the LANCP command SET DEVICE/NOJUMBO.
To preserve the setting of jumbo frames across boots, when using LANCP, define the setting in the LANCP
permanent device database, using the command DEFINE DEVICE/JUMBO.