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Re: [NANOG] RFC1918 conformance

  • From: Jeffrey C. Ollie
  • Date: Tue Feb 11 15:44:38 1997

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On Tue, 11 Feb 1997 22:04:19 +0300 (MSK), alex@relcom.eu.net writes:
>
>Sorry, but while I was looking to this list, I just reminded interesting 
>issue. Why IANA did not reserved 223.255.0.0/16 or something simular; by 
>other words, I'd like to have short (256, 512, 1024) private address 
>space in the END of total address space for the normal IP (excluding D 
>class etc).
>
>For example. I have a lot of CISCO routers with OSPF protocol. Thnis 
>crazy IOS use highest loopback interface address as router-ID address; I 
>use loopbacks to install load balancing etc. and I can't prevent 
>loopbacks from being equal on the different routers. That's why I hardly 
>need some IP addresses for 'Loopback 98' interface to use it as 
>router-ID; and this have to be higher than any user's addresses. I use 
>233.255.254.0/24 for this purposes, but it's not reserved address.
>
>This is one, simple, example why it's nessesary to reserve some short 
>address space in the begin and in the end of total addresses.

No, that's an example of a poorly designed protocol
implementation. One ought to be able to specify an arbitrary router id
for OSPF (heh - even Bay routers can do that :) rather that relying on
such an odd algorithm. I was so surprised by this that I just had to go
look it up:

<http://www.cisco.com/univercd/data/doc/software/11_2/cnp1/5ciprout.htm#REF38888>

The equivalent Bay reference:

<http://support.baynetworks.com/Library/tpubs/content/114065A/J_55.HTM#HEADING55-6>


[A copy of the headers and the PGP signature follow.]

Date: Tue, 11 Feb 1997 14:23:20 -0600
From: "Jeffrey C. Ollie" <jeff@ollie.clive.ia.us>
In-reply-to: Your message of "Tue, 11 Feb 1997 22:04:19 +0300."
             <Pine.SUN.3.91.970211213356.1420T-100000@virgin> 
Subject: Re: [NANOG] RFC1918 conformance 
To: nanog@merit.edu

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-- 
Jeffrey C. Ollie                     |            Should Work Now (TM)
Python Hacker, Mac Lover             |
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