[SUMMARY/NEW PROBLEM] Accomodating VLSM subnets in Solaris 8 ...

From: Bryan J. Smith <b.j.smith_at_ieee.org>
Date: Tue Apr 01 2003 - 16:55:31 EST
Quoting "Bryan J. Smith" <b.j.smith@ieee.org>:
> [ My apologizes in advance if this is answered in a FAQ somewhere. ]
> Limitation (Assumed for Solaris 8):
> - /etc/inet/netmasks only supports non-CIDR netmasks (/8, /16, /24)
> Problem:
> - My subnet is a CIDR (/26).

First off, I used CIDR when I meant as shorthand for VLSM (I use the two terms
far too interchangably).  So when I wrote "/26" I meant it as shorthand for
"" (which is in my /etc/inet/netmask). 

Secondly, an endless number of people (wow!) have E-mailed off-list and stated
that Solaris 8 does, in fact, support VLSM netmasks in /etc/inet/netmask.  Okay,
that's good to now confirm.

Which brings me to why I made that incorrect assumption.

Because 1) my /etc/inet/netmasks already has:  
   [ Where IP = XX.YYY.ZZ.71 and ZZ = class A ]

And 2) after a Google search that came back with several pages that said SunOS 5
doesn't support CIDR/VLSM in /etc/inet/netmasks (I'll now assume those are dated
/ for older SunOS 5.x versions).

So I incorrectly assumed the previous administrator** overlooked this and that
was the root cause.

I'm going to have to check to see where and why the above /etc/inet/netmask is
not working on my system.  I'll further summarize why it didn't work.  If anyone
has any suggestions, please let me know.  Thanx.

-- Bryan

**NOTE:  I just changed employers and caught this nagging issue off-the-bat
where select clients could not connect to this one Solaris system's web services
(because they were all using the same major carrier as I quickly discovered ;-).
 netstat -r was reporting XX.0.0.0 as the subnet and ifconfig was reporting
ff000000 as the mask with XX.255.255.255 as the broadcast address.  Sure enough,
a quick "ifconfig set XX.YYY.ZZ.71 netmask broadcast
XX.YY.ZZ.127" took care of the problem completely (can't belive my new employer
had been putting up with this little issue for that long -- the previous admin
blamed it on Solaris!).

Bryan J. Smith     (suffix-free title for your protection)
mailto:b.j.smith_at_ieee.org             http://www.thebs.org
   community : free will          communism : will free
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Received on Tue Apr 1 17:08:30 2003

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