............................Contents


1. Introduction to the `hme` Fast Ethernet Device Driver	1
..Related Documentation	1
..Typographic Conventions	2
..Ordering Sun Documents	3
2. The `hme` Device Driver	5
..Hardware Overview	5
..Operating Speeds and Modes	6
..Auto-Negotiation	6
....Internal Transceiver	7
....External Transceiver	7
3. Parameter Definitions	9
..Driver Parameter Values and Definitions	9
....Defining the Current Status	11
....Inter-Packet Gap Parameters	11
....et Using `lance_mode` and `ipg0`
.......Packet Using `lance_mode` and `ipg0`	12


....Operational Mode Parameters	13
....Defining the Number of Back-to-Back Packets To Transmit	15
....Reporting Transceiver Capabilities	15
....Reporting the Link Partner Capabilities	16
4. Setting Parameters	19
..Parameter Options	19
..Setting Parameters Using `ndd`	20
....Identifying Device Instances	20
........· To specify the device instance for the `ndd` utility	20
....Non-Interactive and Interactive Modes	21
........· To modify a parameter value	21
........· To display the value of a parameter	22
........· To modify a parameter value in interactive mode	22
........· To list all the parameters supported by the
...........`hme` driver	23
........· To select one of the five local transceiver
...........capabilities and set the mode to forced mode	24
........· To set the mode to auto-negotiation	24
....Configuring TCP/IP for Maximum Performance	25
........· To benchmark the TCP/IP throughput	25
........· To set the TCP hiwater marks for best
...........performance	25


..Setting Parameters in the `/etc/system` File	25
....· To set the `ipg1` to 10 and `ipg2` to 5 when you reboot .	26
..Setting Parameters Using the `hme.conf` File	27
....· To set `ipg1` to 20 and `ipg2` to 10 for the `SUNW,hme`
.......device in SBus slot 0xe	27