Solving the network collisions in Unix box


 
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Old 07-26-2006
Solving the network collisions in Unix box

Hi,
Anyone can u give me an idea to clear the network collisions in the unix box(Solaris and Linux)? NIC performance is very low, and it shows collisions, when issuing the command ifconfig -a in the production server. How can i rectify the network collisions in the box. Using netstat and lsof commands, we can see the listening ports and we can monitor the network status. Is there anyother way to fix that kind of problems.

Thanks
raja
 
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ESHCONFIG(8)						    BSD System Manager's Manual 					      ESHCONFIG(8)

NAME
eshconfig -- configure Essential Communications' HIPPI network interface SYNOPSIS
eshconfig [-estx] [-b bytes] [-c bytes] [-d filename] [-i usecs] [-m bytes] [-r bytes] [-u filename] [-w bytes] [interface] DESCRIPTION
eshconfig is used to configure device-specific parameters and download new firmware to the Essential Communications RoadRunner-based HIPPI network interface. The interface is very sensitive to the DMA performance characteristics of the host, and so requires careful tuning to achieve reasonable performance. In addition, firmware is likely to change frequently, which necessitates a reasonably easy way to update that firmware. Available operands for eshconfig: -b bytes Adjust the burst size for read (by NIC of host memory) DMA. -c bytes Adjust the burst size for write (by NIC of host memory) DMA. -d filename Filename for file to download into NIC firmware. This must be a file in the standard Essential format, with :04 preceding every line, and a tag line at the end indicating the characteristics of the firmware file. -e Write data to EEPROM. Normally, setting tuning parameters will only persist until the system is rebooted. Setting this parameter ensures that the changes will be written to EEPROM. -i usecs Interrupt delay in microseconds. -m bytes Minimum number of bytes to DMA in one direction (read or write) before allowing a DMA in the other direction. Tuning this prevents one direction from dominating the flow of bytes, and artificially throttling the NIC. -r bytes Bytes before DMA starts for read (from host to NIC). This controls how soon the DMA is triggered; until this many bytes are requested, the DMA will not begin. -s Show statistics for the HIPPI NIC. Repeat the option to suppress non-zero statistics. -t Show current tuning parameters on the host. -u filename Name of file to which the NIC firmware should be uploaded. Not currently supported. -w bytes Number of bytes required before write (from NIC to host) DMA is started. Until this many bytes are ready to be written, the DMA will not start. -x Reset the NIC. This is necessary for the HIPPI-FP support, as ifconfig(8) will no longer physically reset the NIC when the inter- faces goes up and down. Only the super-user may modify the configuration of a network interface. DIAGNOSTICS
Messages indicating the specified interface does not exist or the user is not privileged and tried to alter an interface's configuration. SEE ALSO
esh(4), ifconfig(8) HISTORY
The eshconfig command first appeared in NetBSD 1.4. BSD
June 17, 2005 BSD