IP Address Block Assignment

here's how time warner telecom does it

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.

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

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

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

I thought classes of IP aren't used anymore.

Start here:

It just means he's applying for a block that uses a 24 bit mask.

and not necessarily between 224..239 (correct?)

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

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.