[j-nsp] Urgently Need Sample of IP Address Plan

[Leslie]

This might be a better conversation for NANOG ?



Chuck Anderson wrote:
> On Mon, Mar 16, 2009 at 05:58:34AM -0700, chenoi A wrote:
>> I need some advised and sample perhaps... I have being searching 
>> net, reading books, get some advise, ARIN/APNIC guide, etc but i 
>> still think i miss the idea.
>>
>> i have block of /22. What is the best way to manage and allocate the 
>> ip ... what iam thinking now is for infra, customer, loopback.
>>
>> is it ok if i divide it to 4 x /24. where should i start from 
>> here....? do i need to allocate 1 block for customer, 1 block for 
>> loopback and 1 block for infra...what is the best practice. if i got 
>> some example or sample that would give me more understanding on how 
>> to do this ip plan.
> 
> How many routers do you have now?  How many do you expect to grow to?
> 
> How many links between routers do you have now?  How many do you 
> expect to grow to?  Include links to customers in these counts.
> 
> Those two things will tell you how much space you should reserve for 
> loopbacks and point-to-point links, repectively.
> 
> How many customers do you have?  What are their address space needs?
> 
> How many servers do you have?  How many workstations, IP phones, 
> printers, etc?  Will they all be in one place, or in different pops?  
> Do you want to segregate servers from workstations?  Do you want to 
> provide WiFi access on a separate subnet?
> 
>> i want to ensure my ip plan is well manage and properly assign, no 
>> waste of ip. i want to ensure i fully utilize the ip given from RIR.
>>
>> Please help me..please do assist me...much appreciate if got sample 
>> of ip plan as my guideline.
> 
> Figure out how many subnets you need and how big each subnet should be 
> based on answers to the above questions.  Leave some wiggle room for 
> growth within each subnet (but not too much these days or ARIN won't 
> approve your request).  Round up to the nearest power of 2.  Pack the 
> subnets together into whatever space you can justify.
> 
> e.g. for an Infrastructure block:
> 
> 5 routers = 5 /32 loopback IPs, round up to 8
> 
> 8 links between core routers
> 20 customers
> ----------
> 28 /30 PtP link subnets = 112 addresses total, round up to 128
> 
> 2 DHCP/DNS servers
> 2 Web servers
> 2 Mail servers
> 2 database servers
> 2 application servers
> 2 file servers
> ----------
> 12 server IP addresses, round up to 16
> 
> 10 staff workstations
> 10 staff IP telephones
> 3 staff printers
> ------------------
> 29 workstation IP addresses, round up to 32
> 
> Maybe have a DHCP pool for your LAN portable devices: 32 addresses
> 
> Pack the above like this:
> 
> Infrastructure 10.10.10.0/24			256
> 	Point-to-Points	10.10.10.0/25		128
> 	Workstations	10.10.10.128/27		32
> 	LAN DHCP Pool	10.10.10.160/27		32
> 	WiFi DHCP Pool	10.10.10.192/27		32
> 	Servers		10.10.10.224/28		16
> 	Loopbacks	10.10.10.240/29		8
> 	FREE		10.10.10.248/29		8
> 
> For customer assignments, you make them justify their needs in the 
> same way so you can size their assignments properly and fit them into 
> the space you request from ARIN.
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