ramey@ti-csl (09/11/86)
We have 2 780's running Ultrix. One runs version 1.1, the other we
just installed with 1.2. On the 1.2 host, syslog doesn't work. The
only difference I could tell between the two systems is that when I do
`/etc/ifconfig lo0', the 1.1 system gives the flags UP,RUNNING but the
1.2 system only says UP. I recompiled syslog using 1.1 sources and the
perror message was `Network is unreachable'.
Any ideas what is wrong? The fact that the RUNNING flag is not present
apparently makes lo0 unusable; telnets to localhost apparently go over
the ethernet rather than through the loopback, for example.
Joe Ramey
TI Computer Science Center, Dallas
CSNET: ramey@ti-csl
UUCP: {rice,ut-sally!im4u,texsun}!ti-csl!rameyrad@mitre-bedford.arpa (Dick Dramstad) (09/15/86)
Joe, >We have 2 780's running Ultrix. One runs version 1.1, the other we >just installed with 1.2. On the 1.2 host, syslog doesn't work. The >only difference I could tell between the two systems is that when I do >`/etc/ifconfig lo0', the 1.1 system gives the flags UP,RUNNING but the >1.2 system only says UP. I recompiled syslog using 1.1 sources and the >perror message was `Network is unreachable'. >Any ideas what is wrong? The fact that the RUNNING flag is not present >apparently makes lo0 unusable; telnets to localhost apparently go over >the ethernet rather than through the loopback, for example. We had the same problem on our 8600. What was worse, all our syslog entries ended up being sent to a default routing host, which was elsewhere on the ARPAnet. We finally found the problem after looking at the default /etc/rc.local file supplied with the distro. You'll need to use: /etc/ifconfig lo0 localhost to cure your problem. I don't know the "why" for this fix; I suppose it's some Ultrix-specific 1.1->1.2 change. Hope this helps, Dick Dramstad (rad@mitre-bedford.arpa)
ron@BRL.ARPA (Ron Natalie) (09/16/86)
In 4.2 the loopback interface was hard initialized to 127.0.0.1. To make it more consitant with the other drivers, it was changed in later BSD versions to have to be explicitly set. -Ron