From owner-freebsd-questions@FreeBSD.ORG  Wed Jul 30 09:08:51 2003
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From: "Max Clark" <max.clark@media.net>
To: "Supote Leelasupphakorn" <pjn0211@yahoo.com>,
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Date: Wed, 30 Jul 2003 09:13:59 -0700
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cc: freebsd-isp@freebsd.org
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Subject: RE: Can I subnet my network like this ?
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The only real concern is if you are using cisco routers in this equation. If
so, make sure you enable ip-subnet-zero in the config.

Max

-----Original Message-----
From: owner-freebsd-isp@freebsd.org
[mailto:owner-freebsd-isp@freebsd.org]On Behalf Of Supote
Leelasupphakorn
Sent: Wednesday, July 30, 2003 5:46 AM
To: freebsd-questions@freebsd.org
Cc: freebsd-isp@freebsd.org; freebsd-net@freebsd.org
Subject: Can I subnet my network like this ?


Hi, all

   I would like to verify my knowledge
by building the network like below but not
sure whether it's impossible for subnetting
like this - say, from Gateway no2, is divided
to 172.16.0.0/16 and 172.17.0.0/16 subnet.

   I heard that it isn't recommend or
impossible (not sure again) to use FIRST or
LAST subnet in the allocated IP address pool,
is it?

  Section no.1 is existed and I own the Gateway no.2.
My plan is enable NAT on it by following the
instruction in FreeBSD handbook. Any comments are
welcome.


       |
       | if_1 = 202.xx.xx.xx
  |---------------|                        |
  | Gateway no.1  |                        | section 1
  |---------------|                        |
       | if_2 = 10.0.0.1                   |
       |                                 ----
       |                                   |
       | if_1 = 10.0.0.254                 |
  |---------------| if_2 = 172.16.0.1/16   | section 2
  | Gateway no.2  |----------------        |
  |---------------|                        |
       | if_3 = 172.17.0.1/16              |
       |                                   |


Thanks in advance,


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