networking bug?

[Glenn Sweeney]

In article <742 at rosevax.Rosemount.COM> dave at rosevax.Rosemount.COM (Dave Marquardt) writes:
>I've got a problem.  We have a VAX-11/785 running 4.2BSD, and every two weeks 
>or so, telnet and rlogin stop working.  This is a BIG problem, because many of 
>our users log in via Bridge terminal servers.  The Bridge box is also no
>longer able to talk to the VAX, and disconnects all sessions to that
>machine.
>
>In checking out the problem, I tried using telnet from the VAX to another
>machine, and got this message:
>
>	Out of buffer space.

This problem exists because the system is failing to properly release mbufs
after they are used.

A workaround to this problem is to edit the file /sys/h/mbuf.h and change the
value of NMBCLUSTERS from 256 to 1024, re-sysgen the kernel, and reboot.

Glenn Sweeney
DECwest Engineering
Bellevue, WA., 98007
(206) 865-8738

sweeney%decwet.DEC at decwrl.DEC.COM