IP alarm bells ringing

if companies setup things correctly there would be more than enough IP's for everyone. Ever heard of NATing. Big co's like ibm and GM have multiple class A subnet's assigned to them. You telling me they have hundreds of thousands of internet facing machines.

Saule: IPv4 is a 32 bit system so there aren't that many IP's availalble compared to v6.

From http://en.wikipedia.org/wiki/IPv6

It is common to see examples that attempt to show that the IPv6 address space is extremely large. For example, IPv6 supports 2128 (about 3.4×1038) addresses, or approximately 5×1028 addresses for each of the roughly 6.5 billion (6.5×109) people alive today.[1] In a different perspective, this is 252 addresses for every star in the known universe[2] – more than ten billion billion billion times as many addresses per star than IPv4 supported.
 
I last did this stuff in first year so it might sound a little rusty...
IPv4: xxx.xxx.xxx.xxx is the normal configuration. So there are effectively (taking Class A,B,C,D into consideration) 255*255*255*255 addresses==4'228'250'625 addresses (~4 billion).

IPv6 makes use of hexadecimal characters (0000-FFFF) where FFFF(base16) == 65'535(base10). IPv6 uses 8 sections instead of IPv4's 4 sections, so 65'535*65'535*65'535*65'535*65'535*65'535*65'535*65'535 == 3.4024x10^38 (ie this is a damn huge number). Taking 6.8 billion people to be on the earth, there would be 5x10^28 IP's per person. Just a little hard to finish all of this I reckon.... until 2100 and then we got a problem again... :)
 
Saule said:
How come everyones adls router ip is 10.0.0.2? :confused:
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Its on a local, non-routable range, there are a few set aside for this. That's not its external internet IP so as long as its unique on your lan its fine.
 
The ranges 10.x.x.x and 192.168.x.x.x and 172.16.x.x are private IP ranges, which are set in classes, ie 10.x.x.x is class A.

These private IP addresses can only be connected to the internet via a WAN interface, which in your case would be via the WAN interface on your router (ie the modem inside your router). The WAN interface get's the public internet IP-address ie 41.241.xxx.xxx from the carrier and is then connected to the internet.
 
Had lunch with the CEO of AfriNIC the other day and he told me their aim is to get everyone (including Africa) on IPv6 by 2011/2012.

The biggest problem for us (and most other corporates) is not to do it, but to get all the equipment to support it. It means we'll have to run a dual architecture which is going to be a pain to build and operate.
 
Syndyre said:
Its on a local, non-routable range, there are a few set aside for this. That's not its external internet IP so as long as its unique on your lan its fine.
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It would have to be unique on the network. If one node has an IP 10.a.b.c and another node says to the network I want 10.a.b.c then it will be denied access to that address and will be (if there is a DHCP server) allocated another IP address. If it is static, oops.... then it won't have network access.
 
froot said:
The ranges 10.x.x.x and 192.168.x.x.x and 172.16.x.x are private IP ranges, which are set in classes, ie 10.x.x.x is class A.

These private IP addresses can only be connected to the internet via a WAN interface, which in your case would be via the WAN interface on your router (ie the modem inside your router). The WAN interface get's the public internet IP-address ie 41.241.xxx.xxx from the carrier and is then connected to the internet.
Click to expand...

How would you check what your internet ip is?
 
Saule said:
How would you check what your internet ip is?
Click to expand...

Log into your router's web interface. In there it will give you the following (this is from a Telkom router)


Connection Information
DSL UP
Downstream / Upstream (Kbps) 4096/512
Internet Connected
Connected Time 7hr 52min 24sec
Connection Type PPPoE
Username xxxxxxxxxxxxx@xxxxxxxxxxx
IP Address xxx.xxx.xxx.xxx <<----------------internet IP
Default Gateway xxx.xxx.xxx.xxx <-- default gateway
Primary DNS
Secondary DNS
 
vodacom3g said:
Had lunch with the CEO of AfriNIC the other day and he told me their aim is to get everyone (including Africa) on IPv6 by 2011/2012.
Click to expand...
My people will call your people.... we'll do lunch :p

vodacom3g said:
The biggest problem for us (and most other corporates) is not to do it, but to get all the equipment to support it. It means we'll have to run a dual architecture which is going to be a pain to build and operate.
Click to expand...
I've noticed that most of the bleeding edge/open source/community driven developments are well on their way to support IPv6. The more conservative/proprietary vendor driven products are years behind though.

So with all this talk about IPv6... who is actually running IPv6 addresses on their home networks?
 
I still use IPv4 on my networks - easy to remember which PC is what IP.

But with IPv6 it's a different game.

Old routers will have to be replaced with new (which can handle IPv6) and this will mean a major change.

Is Neotel's network IPv6 compliant?

I'm pretty sure Telkom's network is noncompliant :D
 
froot said:
It would have to be unique on the network. If one node has an IP 10.a.b.c and another node says to the network I want 10.a.b.c then it will be denied access to that address and will be (if there is a DHCP server) allocated another IP address. If it is static, oops.... then it won't have network access.
Click to expand...

That's what I said. 99% of people running ADSL at home would have a network consisting of one class c subnet.
 
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