steve@milo.UUCP (Steven Kahn) (12/06/84)
[] We're trying to put BBN VAX TCP/IP sys. 10.16 up under 4.1BSD on a VAX. We're interfacing the VAX to an Ungermann-Bass broadband network via a DR11-W parallel interface. We have got FTP and telnet working to a degree, but are having a few minor problems. Specifically, after a little while the allocated message buffers (mbuf's) get scribbled on and the machine crashes. More detail: We have tried this under a version of VMUNIX that is as close to the distribution as our hardware allows, as well as a heavily instrumented version of our current system with the TCP/IP code. It happens faster in the latter case (not sure why), but eventually our instrumentation reports massive corruption in the mbuf's, followed sooner or later by some program attempting to indirect off a corrupted pointer. (In the non-instrumented version, this is verified by post-mortem autopsies.) We have even done a "local loopback" of our driver, so that virtually none of our code is called: the same linked list of mbuf's that gets passed to the UB send routine is returned by the UB receive routine untouched. To no avail. If anybody has experienced this before or has any suggestions, we would be very glad to hear from them. If anyone has been having unexplained crashes with BBN TCP/IP: now you know ... Steve Kahn, Johns Hopkins University Applied Physics Lab ...!seismo!umcp-cs!aplvax!milo!steve or aplvax!milo!steve@maryland Joseph S. D. Yao, Hadron Inc. / JHU-APL ...!umcp-cs!aplvax!milo!jsdy or ...!seismo!hadron!jsdy or aplvax!milo!jsdy@maryland or hadron!jsdy@seismo