Several things come to mind.

         Do you see a collision every time this system
         trys to send a packet? Try changing the state
         of the "hearbeat" switch on the 10BT->AUI adapter.

         Does someone else have the same IP address?
         Version one of this problem is a ping to host A
         that already has an arp entry for that IP address
         to somewhere else.

         Can the machine you are pinging actually route
         back to the VAX? Routing errors often send
         packets on circuitous and bogus trips.
         Try running traceroute on the target machine
         to see how it would get its packets to the
         vax.

         The switch could be dirty. It has to switch
         both the xmit and recv lines from the BNC
         to the AUI. Get some contact cleaner, power
         off the VAX, shoot cleaner into the switch
         and work it back and forth a dozen times.

         Check the cable between the hub and the
         VAX. You need both pairs connected for
         it to work. Try an alternate cable, try
    *         an alternate port on the hub.


--Chuck

At 07:48 PM 8/1/00 -0400, Jed Dobson wrote:
>I don't think it is. When I supply the IP of a nameserver outside of my
>network the ping still fails. I'm getting pretty fustrated with this.
>It can't be a hardwar failure, as I can receive responses to my pings.
>
>The system boots to the miniroot fine, but we have house rules here (at my
>appt the "homedatacenter") about machines needing to be on the network or
>else...There are no expansion slots so I can't try additional adapters.
>Anyone ever see anything like this before?
>
>
>-jed
>
>// Jed Dobson, Systems Engineer, Sun Microsystems Certified SE
>// Workgroup Technology Partners, Inc
>// 855 Main St, Westbrook ME 04092
>// Office: (207) 854-5200 |  Cell: (207) 838-7257
>
>On Wed, 2 Aug 2000, P.G. wrote:
>
> > On Tue, 01 Aug 2000, Jed Dobson wrote:
> > > I have a 3100 M48 with some wierd problems with the on-board LANCE
> > > ethernet device. I have switched the switch to the AUI adapter. I have a
> > > transceiver to convert to 10baseT, which is attached to a dinky 8 port
> > > hub. I can't ping out from this box, but I can assign an address to 
> it and
> > > ping it from a remote machine (the remote boxes even show correct arp
> > > entry). The link light is up and the LED's on the transceiver (yes I have
> > > tried multiple ones) flash when they "see" network traffic.
> > >
> > Can this have anything to do with "back-to-back" packets - when you 
> ping the
> > reply is there too fast? Try to ping something outside your local ethernet?
> >