Actually the ethernet on the KA640 is on the CPU card (there is no ethernet 
card) however having just this problem I was told (and pass on to you) that 
the switch on the CPU bulkhead gets dirty and this screws up the ethernet 
stuff.

Carefully take apart the bulkhead (some screws on the back and a retaining 
bolt around the BNC connector) and clean out the switch using contact 
cleaner or your favorite solvent. Dry it off, reassemble, and try again. It 
worked for me!

--Chuck

At 10:16 AM 9/25/00 -0400, NetBSD Bob wrote:
>Still working furiously with (or cussing furiously at) my funky MicroVAX
>3300, I don't seem to be able to get the ethernet to work, on Ultrix 4.0
>or 4.2.  Ping sees the port is alive, netstat -i says it is ifconfigged,
>but ftp into or out of it just dies.... timeout, nothing.  Netstat suggests
>some packets are corrupted or with errors.  The ifconfig line is rc.local
>is:     ifconfig ln0 xxx.xxx.xxx.xxx up.      This is when setup to use
>either the AUI port with a dongle, or the BNC port with a terminator TEE.
>Neither of the little LED lights on the patch connect panel show activity.
>The box I was using to get into or out of the VAX is a Sparcbook Solaris.
>It works fine with a VAXstation 3100/M76, but not with the MicroVAX 3300.
>I seated and reseated all cables and boards, just in case something was
>loose, but it did not make any diff.
>
>Is there something strange about the DEC built-in ethernet on the KA640
>that I am missing?  Any suggestions or insights are appreciated.
>
>Thanks
>
>Bob