42
Sun GigaSwift Ethernet Adapter Installation and User’s Guide • August 2004
If
enable_ipg0
is disabled, the value of
ipg0
is ignored and no additional delay is
set. Only the delays set by
ipg1
and
ipg2
will be used. Disable
enable_ipg0
if
other systems keep sending a large number of back-to-back packets. Systems that
have
enable_ipg0
set might not have enough time on the network.
You can add the additional delay by setting the
ipg0
parameter from 0 to 255, which
is the media byte time delay.
TABLE 4-5
defines the
enable_ipg0
and
ipg0
parameters.
The
ce
device supports the programmable Interpacket Gap (IPG) parameters
ipg1
and
ipg2
. The total IPG is the sum of
ipg1
and
ipg2
. The total IPG is 0.096
microseconds for the link speed of 1000 Mbps.
TABLE 4-6
lists the default values and allowable values for the IPG parameters.
By default, the driver sets
ipg1
to 8-byte time and
ipg2
to 4-byte time, which are
the standard values. (Byte time is the time it takes to transmit one byte on the link,
with a link speed of 1000 Mbps.)
If your network has systems that use longer IPG (the sum of
ipg1
and
ipg2
), and if
those systems seem to be slow in accessing the network, increase the values of
ipg1
and
ipg2
to match the longer IPGs of other machines.
TABLE 4-5
Parameters Defining
enable_ipg0
and
ipg0
Parameter
Values
Description
enable_ipg0
0
1
enable_ipg0
reset
enable_ipg0
set (Default=8)
ipg0
0 to 255
The additional time delay (or gap) before
transmitting a packet (after receiving the
packet) (Default=8)
TABLE 4-6
Read-Write Interpacket Gap Parameter Values and Descriptions
Parameter
Values
(Byte-time)
Description
ipg1
0 to 255
Interpacket gap 1 (Default = 8)
ipg2
0 to 255
Interpacket gap 2 (Default = 4)
Summary of Contents for GCS
Page 8: ...viii Sun GigaSwift Ethernet Adapter Installation and User s Guide August 2004 ...
Page 18: ...x Sun GigaSwift Ethernet Adapter Installation and User s Guide August 2004 ...
Page 58: ...36 Sun GigaSwift Ethernet Adapter Installation and User s Guide August 2004 ...
Page 90: ...68 Sun GigaSwift Ethernet Adapter Installation and User s Guide August 2004 ...
Page 100: ...78 Sun GigaSwift Ethernet Adapter Installation and User s Guide August 2004 ...
Page 110: ...88 Sun GigaSwift Ethernet Adapter Installation and User s Guide August 2004 ...
Page 114: ...92 Sun GigaSwift Ethernet Adapter Installation and User s Guide August 2004 ...