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Full Discussion: network problems with sco
Operating Systems SCO network problems with sco Post 302299242 by brylade on Thursday 19th of March 2009 02:43:58 PM
Old 03-19-2009
SCO NIC dies until reboot

I would suggest that perhaps you are running out of tcp connections or you have a bad nic on your network.

If you check scoadmin / network / tcp of the NIC you should see how many tcp connections you are willing to allow. We set up most machines to be 512 but you can set it up any way you like.

I have seen several times, SCO 5.0.x boxes that the network seems to just die randomly and upon reboot then it works flawlessly. Usually it is one of two things, either there is a bad NIC on your network that is corrupting arp packet requests (wireshark or another packet sniffer should show you this symptom within a few minutes, and will usually be miss-labeled "Gratuitous Arp Requests" and should be called "non-conforming arp requests") or you are having something make more socket connections that you have tcp connections. As soon as you reach the number you specified, the NIC will stop processing all traffic.
 

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tcp.h(3HEAD)                                                          Headers                                                         tcp.h(3HEAD)

NAME
tcp.h, tcp - definitions for the Internet Transmission Control Protocol (TCP) SYNOPSIS
#include <netinet/tcp.h> DESCRIPTION
The <netinet/tcp.h> header defines the following macro for use as a socket option at the IPPROTO_TCP level: TCP_NODELAY Avoid coalescing of small segments. The macro is defined in the header. The implementation need not allow the value of the option to be set with setsockopt() or retrieved with getsockopt(). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
getsockopt(3XNET), socket.h(3HEAD), attributes(5), standards(5) SunOS 5.10 10 Sep 2004 tcp.h(3HEAD)
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