Random boredom thread - ip ranges?

Kol · 23 Nov 2006 at 22:06

Out of interest, what IP range (for want of a better expression) do you use? I notice it varies a lot between personal use and that of say an institution.

When I first started using networks, I always used 192.168.x.x , but just because it's neater :rolleyes:

I have all my machines on my network with static ips in the 10.0.0.x range. I also noticed a few unis I've been to, including my own, use 152.x.x.x ip ranges.

Is there any particular advantage?

VeNT · 23 Nov 2006 at 22:42

not really.
most of my networks are on the subnet of 255.255.255.0 with IPs in the range of 192.168.1.X or .2.X unless their large in which case I have another set I use.
I use those two because most off the shelf hardware (routers etc) with built in DCHP use those.

Craig321 · 23 Nov 2006 at 22:44

Our BT line is dynamic, the IP changes to a completley different one every time we reboot the router.

I've just left the router on default - 192.168.1.1 for the router and then, for some reason, 192.168.1.30 -> 192.168.1.255 for the PCs (not sure why it starts on 30).

Craig.

ruffneck · 24 Nov 2006 at 09:11

the major advantage of different ranges depends what class the IP is in

http://www.freesoft.org/CIE/Topics/26.htm

ie a Class A range has the ability for 16,777,214 hosts and a Class C 254 hosts

192.168 is a typically used Class C Address.

Skiddley · 24 Nov 2006 at 16:42

Makes no difference, you can use any of the Private addresses defined in RFC 1918\3330\3927 (IANA won't assign these publically);

10.0.0.0/8
172.16.0.0/12
192.168.0.0/16
169.254.0.0/16

Like others have said, unless you need a large classful CIDR block, or need to match (or avoid) a particular subnet for any reason (clashing with a work VPN for example) there is no difference.

Also sometimes firmware in consumer routers force the subnet, 192.168.0.0/16 for example.

Skidd.

Curiosityx · 24 Nov 2006 at 16:56

Its depends on your needs.

For guaranteed future expansion and large businesses - Class A
For medium sized business or environments not liable to change - Class B
For small business with less than 254 hosts not liable to change - Class C

Personally i normally use Class A and subnet accordingly, but as a manged service provider we have other considerations to take note of.

Skiddley · 24 Nov 2006 at 17:03

The world isn't classful anymore.

Uhtred · 24 Nov 2006 at 17:20

your uni is on a 152 range? that isn't a private range, is it a JANET range or something?

Kol · 24 Nov 2006 at 17:32

Zap said:
your uni is on a 152 range? that isn't a private range, is it a JANET range or something?

Could be 172. now I think of it, although it could be a janet range. Apologies.

Uhtred · 24 Nov 2006 at 17:58

Mikol said:
Could be 172. now I think of it, although it could be a janet range. Apologies.

lol no need to apologise :confused:

Kol · 24 Nov 2006 at 18:17

Zap said:
lol no need to apologise

Craig321 · 24 Nov 2006 at 21:49

Kermit said:
it will start in .30 as that leaves you 29 ip address for you to assign static ip's....ie servers, printers etc.

Ooohhhh, cool

oddjob62 · 25 Nov 2006 at 07:38

Mikol said:
Out of interest, what IP range (for want of a better expression) do you use?

My LAN is currently a complete testbed for my various servers, firewalls and routers. So i have about 6-8 (depending on what i'm doing) subnets set up. I generally use either the 10. or 192. I don't think i've ever set up with a 172.
No reason for it, just whatever pops into my head when i'm setting it up.