IP Address Block Assignment

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Folks:


Let us assume that a large multinational company is about to setup a
standard corporate network with global reach.  Here are a few related
questions:

    *   HOW does the company get an IP address block assigned to it for its
global network to function ?
    *   WHO assigns the IP address block to be used in the company's global
network ?
    *   Does the company have a CHOICE in selecting its IP address block ?
    *   Can someone walk me through the PROCESS from the point of applying
for a block of IP addresses to the point of having same assigned to the
company ?

 Any references/links to good literature describing the assignment process
would be deeply appreciated.





Thanks,
Jo.



Re: IP Address Block Assignment
On Wed, 01 Feb 2006 10:14:35 -0500, JoJo wrote:

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here's how time warner telecom does it
http://info.twtelecom.net /
i'm currently applying for a class C from them, and they are basically
making me justify the need by answering a bunch of questions about how we
will use it...

IP Address Block Assignment
John Smith:



I know that classes A/B/C are often chosen based on the # of subnets & # of
hosts per subnets that are required. I believe that the class A/B/C choice
may also has something to do with public or private addresses to be used on
individual LANs.

     *    Why did you prefer to apply for Class C address rather than Class
A or Class B ?
     *    Does this mean that you will be using private addresses + NAT on
your various LANs. ?




Thanks,
John.

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Re: IP Address Block Assignment
On Thu, 02 Feb 2006 15:39:52 -0500, JoJo wrote:

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we have a lot of servers that will be publicly accessible from the
internet

Re: IP Address Block Assignment
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I'm just curious but are you talking 'hundreds'?  I just suspect the Telco
will ask you to explain why NAT working with a smaller IP block isn't
workable.

BernieM



Re: IP Address Block Assignment
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And the fact that Apache is able to forward HTTP requests based on header
content so a single server can host numerous web sites.

BernieM



Re: IP Address Block Assignment
On Sat, 04 Feb 2006 04:59:36 +0000, BernieM wrote:

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we dont use apache.  we use IIS , and yes it can do the same thing. these
are not static webpages... There is a lot of application processing going
on with other servers.  (this is the real world) we requested a block of
IP addresses with a 24bit mask - as someone pointed out.  i have no idea
where the block will come from, since we haven't been assigned it yet.
good luck getting assigned a full class A, if they are even still around.
we have over a 100 servers.  Plus we need addresses for general end user
connectivity , network devices, and other misc. items.  
(stop sounding so text book).
this will be our 5th class C, ahem, excuse, 24bit block of IPs.  This one
is for our DR site though.

Re: IP Address Block Assignment

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I thought classes of IP aren't used anymore.


Re: IP Address Block Assignment
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It just means he's applying for a block that uses a 24 bit mask.



Re: IP Address Block Assignment

BernieM wrote:
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and not necessarily between 224..239   (correct?)


Re: IP Address Block Assignment

q_q_anonymous@yahoo.co.uk wrote:
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err, whoops that's class D - multicast -  range.
I meant
does he also mean that the block was in the class C range, 192..223


Re: IP Address Block Assignment
<JoJo> wrote:

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Start here: http://www.arin.net/registration/guidelines/index.html

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