[racktables-users] Re: Subnetting

  • From: Michael Richardson <mcr@xxxxxxxxxxxx>
  • To: racktables-users@xxxxxxxxxxxxx
  • Date: Mon, 06 Sep 2010 20:42:19 -0400

>>>>> "David" == David Comerford <davestyle@xxxxxxxxx> writes:
    David> I work for a hosting provider which has a few assignments of
    David> /19 and /20 IP blocks.  At the moment we use bloody
    David> spreadhseets to track them in blocks of /24. On the plus side
    David> it does make it easy to further subnet down to /29's and
    David> /30's for dedicated servers.

    David> If we add our existing /24's to RackTables, how would we go
    David> about subnetting them into smaller blocks? Would it be a case
    David> of deleting a whole prefix and adding the split up chunks
    David> back in?

It's not obvious, but after you add the /24 in, and then you add a /29
or something within the /24, the rest of the space gets marked as
'empty' and you can create subnets within it.

-- 
]       He who is tired of Weird Al is tired of life!           |  firewalls  [
]   Michael Richardson, Sandelman Software Works, Ottawa, ON    |net architect[
] mcr@xxxxxxxxxxxxxxxxxxxxxx http://www.sandelman.ottawa.on.ca/ |device driver[
   Kyoto Plus: watch the video <http://www.youtube.com/watch?v=kzx1ycLXQSE>
                       then sign the petition. 

Other related posts: