Installation guide

AT-2971 Solaris Sparc

To enable support for Jumbo Frames (frames with a length of up to 9014

bytes or up to 9018 bytes in case of VLAN frames), set this parameter to

ON. Using Jumbo Frames can speed up network throughput, because

longer frames reduce the overhead in the operating system.

For full Jumbo Frame support, the MTU (Maximum Transfer Unit) size

used by TCP/IP must also be changed. This can be done with the

ifconfig command.

To change the MTU size, perform the following procedure:

1. The file /etc/rcS.d/S50skge contains a line to set MTU size during

system start. Edit this file.

2. Remove the "#" before the ifconfig line.

3. If necessary, change the adapter device number from skge0 to the

attached number displayed during driver startup.

4. Set the MTU size to 9000, the 14 bytes of the MAC address header or

18 bytes in case of a VLAN MAC address header are not counted.

Note

Jumbo Frames can only be used if all the equipment in your

subnetwork support Jumbo Frames (many current switches do not).

Devices without Jumbo Frame Support will simply drop the longer

frames (and possibly report them as error frames). If problems occur,

try to connect two SK-98xx adapters (with Jumbo Frames enabled)

back-to-back.

RxRingSize_InstX

Type: integer

Default value: 1280 on SPARC

128 on Intel and for jumbo frames on both

platforms

Valid range: 100 - 5000

TxRingSize_InstX

Type: integer

Default value: 128

Valid range: 50 - 2500