dnb@meshugge.media.mit.edu (David N. Blank) (10/08/90)
Is the "netmask +" option to ifconfig broken on a Sun 4? Here's a
dialogue that makes me think so:
(as root on a sun4 running 4.1)
*** Check that yp (NIS) netmask info is correct
everest# ypcat netmasks.byaddr
255.255.0.0
This file is automatically maintained.
*** For kicks check that /etc/netmasks on server is correct
everest# cat /etc/netmasks
# This file is automatically maintained.
# DO NOT EDIT IT UNLESS YOU KNOW WHAT YOU'RE DOING!!
# This data was taken out of YP map 'netmasks.byaddr' at Tue Jul 17 15:41:43 19
0
18.85.0.0 255.255.0.0
*** find the ethernet interface
everest# netstat -i
Name Mtu Net/Dest Address Ipkts Ierrs Opkts Oerrs Collis Queue
le0 1500 18.85.0.0 everest 39695 19 13871 1 203 0
lo0 1536 loopback localhost 2275 0 2275 0 0 0
*** manually ifconfig it wrong & check result
everest# ifconfig le0 everest netmask 255.255.255.0 broadcast 18.85.255.255
everest# ifconfig le0
le0: flags=63<UP,BROADCAST,NOTRAILERS,RUNNING>
inet 18.85.1.59 netmask ffffff00 broadcast 18.85.255.255
ether 8:0:20:8:ee:2b
*** manually request that ifconfig do a lookup of netmask & check result
everest# ifconfig le0 everest netmask + broadcast 18.85.255.255
everest# ifconfig le0
le0: flags=63<UP,BROADCAST,NOTRAILERS,RUNNING>
inet 18.85.1.59 netmask ffffff00 broadcast 18.85.255.255
ether 8:0:20:8:ee:2b ^^^^^^^^
oooops! that's not right!
That's the problem in a nutshell. Did I miss something here?
Respectfully,
David N. Blank
M.I.T. Media Lab
dnb@media-lab.media.mit.edu