Jumbo Frames; Table 4-10 Accept-Jumbo Parameters - Sun Microsystems GigaSwift Ethernet Adapter Installation And User Manual

PCI Bus Interface Parameters
TABLE 4-9
Parameter
rx_dma_weight
infinite_burst
disable_64bit

Jumbo Frames

The variable accept-jumbo enables the driver to instruct the upper layers that the
driver is operating in Jumbo-frame mode.
Note – Jumbo-frame mode is not supported in systems running Solaris 9 x86
software.
accept-jumbo Parameters
TABLE 4-10
Parameter
accept-jumbo
In the Solaris 8 Operating System, accept-jumbo=1 does not take effect on the next
ifconfig. To get the maximum MTU setting use the following command:
ifconfig ce0 mtu 9194
#
In the Solaris 9 Operating System, accept-jumbo=1 takes effect on next ifconfig,
and automatically sets the MTU to 9194.
Although jumbo frames is configurable in 10/100 mode, jumbo frames is only
supported in the Gigabit (1000Mbps) mode. Configuring jumbo frames enables the
Ethernet interfaces to send and receive packets of up to 9216 bytes. However, the
actual transfer size depends on the switch capability.
Description
Determines the multiplication factor for granting credit to the RX
side during a weighted round robin arbitration. Values are 0 to 3.
(Default=0)
Enables the infinite burst capability to be utilized. When this is in
effect and the system supports infinite burs, the adapter does not
free the bus until complete packets are transferred across the bus.
Values are 0 or 1. (Default=0)
Switches off 64-bit capability of the adapter.
Values are 0 or 1. (Default=0, which enables 64 bit capability)
Values Description
1 Enables jumbo frames mode and sets MTU
to greater than 1500.
0 Jumbo frames is not enabled. MTU is at
1500.
Chapter 4 Configuring Driver Parameters 45