starner@burdvax.PRC.Unisys.COM (Mark L. Starner) (08/05/87)
We have had a problem with our ACC IF-11/HDH IMP (sorry, PSN) interface since our conversion to 4.3 BSD. We finally tracked it down to be limited to fragmented or full size (1006) packets. For example, when we would do an FTP get from ucbvax, we would never receive the large 1006 byte packet. All we would get is a 58 byte packet. Eventually, after 3 minutes, we would get a message: netin: connection reset by peer I contacted ACC for help once I discovered the the exact nature of the problem and they told me that there was a bug in the 4.3BSD released vaxif/if_hdh.c and that all 4.3 sites should get the new driver. A temporary fix until you can receive the new driver is to change all occurences of IMPMTU to IMPMTU+2 in if_hdh.c. (this in fact solves the problem). It is reccomended that you contact ACC to receive a copy of the newest driver. They can be reached at: SERVICE@ACC-SB-UNIX.ARPA or at: 1-800-222-7308 (ask for Software Support) The problem also shows itself with SYSERR from your sendmail daemon and with "whois" returning nothing but your prompt if what the NIC is trying to send you is more than 1006 bytes long. Hope this saves someone the 4 months of frustration it caused me. BTW, I would be interested to hear if anyone else knew about or has this problem. -- Mark Starner starner@prc.unisys.com Unisys Corporation/Paoli Research Center {cbmvax,sdcrdcf}!burdvax!starner Paoli, PA