SUMMARY late collision on SunSwift

From: Stephen.Fitzgerald@dsto.defence.gov.au
Date: Wed May 01 1996 - 22:41:32 CDT


Managers - quick and accurate responses as always.

The problem with the late collisions was the half/full duplex capability of the
SunSwift card (or lack of it). I had the 28115 configured for Full duplex
which the SunSwift card cannot handle. Reconfiguring the hub to half duplex
cleared the problem and improved the network performance.

Thanks to

gdonl@gv.ssi1.com (Don Lewis)
Steve Phelps <steve@epic.co.uk>
dbp@inel.gov (David B. Peterson)
tmornini@infomania.com (Tom Mornini)

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Hello managers,
                I am getting a lot of "late collision" messages on my Axil box.
The Axil is configured thus,

        dual 81 superSPARCS
        Solaris 2.5 - no patches
        SunSwift 100baseT and Fast Wide SCSI SBus card
                - 100 BaseT connected to 28115 SynOptics Hub

The error message is

        May 1 14:22:30 leviathan unix: SUNW,hme0: late collision

These messages appear regularly but do not appear to adversely affect the
network performance. However the machine is not heavily loaded yet and it may
be a problem later.

The SunSwift adapter message as it is detected on bootup

        SUNW,hme0: FEPS (Rev Id = 22) Found
        SUNW,hme0 at sbus0: SBus slot 3 0x8c00000 and SBus slot 3 0x8c02000 and SBus slot 3 0x8c04000 and SBus slot 3 0x8c06000 and SBus slot 3 0x8c0700 0 SBus level 4 sparc ipl 7
        SUNW,hme0 is /iommu@f,e0000000/sbus@f,e0001000/SUNW,hme@3,8c00000
        SUNW,hme0: Using Internal Transceiver
        SUNW,hme0: 100 Mbps Link Up

Anyone with any thoughts on whether this is a potential problem?

Thanks

Stephen Fitzgerald

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==========================================================================
Stephen Fitzgerald
Network and Task Manager
Maritime Operations Division Phone : +61 8 259 5992
DSTO Salisbury, South Australia Fax : +61 8 259 5139

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