ou812
@rr.com | Block of IPs and ARIN questions
How much is in a "block" of IP addresses and how many does it take to require ARIN justification? |
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sporkme
drop the crantini and move it, sister
Premium,MVM
join:2000-07-01
Morristown, NJ | »www.arin.net/registration/guidel···loc.html |
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RockyBB
Premium
join:2005-01-31
Longmont, CO
| reply to ou812
"blocks" come in different sizes. Typically your ISP will provide them for you at minimal cost depending on how many IP addresses you need. Typically, T1 customers will not be charged for as many IP addresses as are needed (some providers like Covad will charge T1 accounts), while DSL and cable accounts would get 1 address included, with an option to purchase more. Carriers will allow you to use those IP addresses while you remain a customer, but won't allow you to take them with you to another provider. If you are a carrier hopper, and expect to change carriers a lot and don't want to reprogram your systems for new IP addresses each time you change providers, you could contract with ARIN for your own block. Due to the cost and complexity at ARIN, using them is obviously not for casual individual internet users. |
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ou812_x
@rr.com | I read through that page, that's a lot of info...
What is the typical amount in a block? |
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RockyBB
Premium
join:2005-01-31
Longmont, CO | blocks come in different sizes. you really should be consulting with your ISP on this. |
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ou812_x
@rr.com | LOL that's really helpful. Why even bother repeating yourself? |
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ou812_x
@rr.com | I'm just trying to find an average: real world scenario(s) |
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tschmidt
Premium,MVM
join:2000-11-12
Milford, NH
 ·Hollis Hosting
 ·Verizon Online DSL
·Fairpoint Communic..
| I don't think there is a "typical" size. Due to the shortage of IPv4 address requests must be justified. Typically ISP or large commercial entity analyzes business needs an requests a block.
Only very large commercial entities get allocations directly, most get sub allocation from their ISP.
/tom |
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RockyBB
Premium
join:2005-01-31
Longmont, CO
| reply to ou812_x
said by ou812_x :
I'm just trying to find an average: real world scenario(s)
Not too many people in the "real world" would use the term "real world scenario," so this must be for some type of school project. Also, most businesses don't really care about averages, they only care about what they need for their own purposes.
There are plenty of folks here who will help you with your school project, but you should disclose that it's a school project. Don't forget about another "real world" phenomena: "garbage in, garbage out." You'll get an answer appropriate to the question.
Most businesses only need 1 or 2 IP addresses. Other businesses (GM, IBM, Sears) could use thousands. So, in terms of businesses, you'll have to define what size of business you're talking about: a neighborhood business (pizza shop, dry cleaner, landscaping service) has much different needs than an international business conglomerate. |
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ou812_x
@rr.com
| Not too many people in the "real world" would use the term "real world scenario,"
HUH?? And how would you know this Mr Expert? And how exactly do you know what 'most businesses' care about? I'm just trying to get a straight answer. An example.
Customer states- "I need a block of IP addresses". How am I supposed to reply? Give the answers from here? "Oh sir/madam, only large commercial entities can have a block and most businesses only really need 1 or 2."
I know that I can go to the ARIN site or use Google or whatever and find the proverbial technical definition. It just confuses me even more. Sorry I asked. |
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JoelC707
join:2002-07-09
Tucson, AZ
clubs:
| That's the point he is trying to make, only the business itself can determine how many IP addresses they need. There is no such thing as a "real world scenario". Well I take that back, considering most businesses will never use more than one IP (even if they get more) then the "real world" IP usage is simply 1.
By most businesses I mean all the mom and pop stores around, all the Pizza Huts, all the Burger Kings, everything. Most of those types of businesses, just need one IP to go through NAT to support all their card readers and whatever else they may want to put on it. With the right port manipulation, you can do a LOT with just one IP and NAT.
As a matter of fact, I know with certainty that McDonald's has only one IP at their stores (and basic 768K DSL at that). I've worked on their Wayport installs before so that's how I know. So if a company as large as McDonald's can get away with only one then I think that pretty much solidifies the "real world scenario" as simply 1. |
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aryoba
Premium,MVM
join:2002-08-22
| reply to ou812_x
said by ou812_x :
Not too many people in the "real world" would use the term "real world scenario,"
HUH?? And how would you know this Mr Expert? And how exactly do you know what 'most businesses' care about?
When you work long enough in the field, I think you will have ideas of how and what in general the customers expect 
Now back to your question. As mentioned previously, the size of IP address block varies. In reality, the size depends on the ISP administration standard and the customer requirement. When you ask your ISP to have certain static IP address, the size could be just /32 (single usable IP address); depending on the ISP administration standard. Some ISP provide "standard" /29 for all static IP customers, unless the customer specifies otherwise.
Sometime ISP set requirements that you as the customer must show at least 80% usage of all of those IP address block within 60 day of assignment. If this term is not met, then the ISP have right to downgrade your assigned size to smaller one. |
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RockyBB
Premium
join:2005-01-31
Longmont, CO
| reply to ou812_x
said by ou812_x :
Customer states- "I need a block of IP addresses". How am I supposed to reply? It's a big responsibility, being Mr. Expert and all, so I'll answer your question seriously. I would reply, "How many addresses do you need in that block, Mr. Customer?" |
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ou812_x
@rr.com | Ok ok, thanks folks, I got it now. And thanks Mr Expert, although I figured you would get all Joe Pesci on me with my comment LOL. "What, am I here to educate you? I'm here to make you smarter???" |
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