Wednesday, February 21, 2018
MTU and Jumbo Frame enabling for better Gigabit
MTU and Jumbo Frame enabling for better Gigabit
Some information Ive assembled regarding enabling jumbo frames to get more bandwidth out of Gigabit Ethernet installations.
Regardless of OS
Update the network driver for your adapter and change its properties to enable any MTU or Jumbo Frame setting. Theres a standard 14-byte offset that comes into play: driver settings may use that; the OS setting wont. Also make sure your switch can handle this: some may support it, but only at 4K or 9K frames.
Standard: 1500
Mix/Match older Realtek & Intel: 4K / 4074 / 4088
Mix/Match newer Realtek & Intel: 9K / 9000 / 9014
High-end Intel & switches allow 16K
Linux
ifconfig ADAPTER mtu #
2000 / XP / Server 2003
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpipParametersInterfaces
Set MTU as Decimal; save as DWORD
Reference
Vista / Server 2008 / 7
netsh int ip set subinterface "ADAPTER" mtu=# store=persistent
Reference
