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40 Sun PCI-Express Dual Gigabit Ethernet MMF/UTP Adapter Installation and User’s Guide • June 2006
Interrupt Parameters
TABLE 3-10 describes the receive interrupt blanking values.
Jumbo Frames
The variable accept-jumbo enables the driver to instruct the upper layers that the
driver is operating in Jumbo Frames mode.
To get the maximum MTU setting use the following command:
Although Jumbo Frames is configurable in 10/100 mode, Jumbo Frames is only
supported in the Gigabit (1000 Mbit/sec) mode. Configuring Jumbo Frames enables
the Ethernet interfaces to send and receive packets of up to 8192 bytes. However, the
actual transfer size depends on the switch capability.
Refer to the documentation that came with your switch for exact commands to
configure Jumbo Frames support.
TABLE 3-10 RX Blanking Register for Alias Read
Field Name Values Description
rx_intr_pkts 0 to 511 Interrupt after this number of packets has arrived since
the last packet was serviced. A value of zero indicates no
packet blanking. (Default=3)
rx_intr_time 0 to 524287 Interrupt after 4.5 US ticks have elapsed since the last
packet was serviced. A value of zero indicates no time
blanking. (Default=1250)
TABLE 3-11 accept-jumbo Parameters
Parameter Values Description
accept-jumbo 1 Enables Jumbo Frames mode and sets MTU
to greater than 1500.
0 Jumbo Frames is not enabled. MTU is at
1500.
# ifconfig ipge mtu 8192