SUMMARY: Broadcast address on Solaris mysteriously changes.
sloewenthal at gemini.edu
Tue Apr 20 11:38:04 EDT 2004
Thanks to everyone who replied to me.
Original post is included at the end of this mail.
* Decided that it was a 3rd party app calling ifconfig. Added an ifconfig
wrapper to log ifconfig usage.
* Removed extra entry from /etc/netmasks.
* Rebooted machine.
After reboot watched the logs and saw something change the NIC. I am in the
process of hunting down the s/w thaat did it.
Information Systems Group
From: LOEWENTHAL Simon
Sent: Friday, April 16, 2004 11:24 AM
To: Sun Mangers
Subject: Broadcast address on Solaris mysteriously changes.
We have a Sun system whose broadcast address changes occasionally from a
Class C broadcast address to a Class B broadcast address. I.E from
172.17.2.255 to 172.17.255.255. I have entered this (See below) into the
/etc/netmasks to try and keep the broadcast address on track, but because
the address mysteriously changes during normal day-to-day operation and the
/etc/netmasks is only (I think?) consulted at during boot time, the
broadcast address still changes.
$ cat netmasks
$ ifconfig -a
lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
hme0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
inet 172.17.2.64 netmask ffffff00 broadcast 172.17.255.255
hme1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3
inet 172.17.3.64 netmask ffffff00 broadcast 172.17.255.255
Kernel architecture: sun4u
Application architecture: sparc
Hardware provider: Sun_Microsystems
Kernel version: SunOS 5.8 Generic 108528-03 August 2000
$ uname -a
SunOS trecsk-ctl 5.8 Generic_108528-03 sun4u sparc
Has anyone seen this before, or can anyone think of a process that would
Many thanks and regards for any time spent on this,
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