dynamic ip addressing

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hamish225

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#150441 23-Jul-2014 00:41

Why do ISP's hand out dynamic IP addresses by default?

is it just easier?

is it just so they can get some extra money off us when we want a static one?

surely it would be easier from a administrative point of view to make sure peoples IP addresses dont change every 5 minutes?

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#1093989 23-Jul-2014 02:05

well with Telecom on most plans a static IP is free so the money thing kinda goes out the window :P

hio77

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#1093991 23-Jul-2014 03:26

theres quite a few isps who do sticky ips too.. (IIRC, slingshot is on that list.)

nobody should change ips every 5 mins, as even on a dynamic ip really your connection should be far more stable than that.. looking at my modem, PPP session has been solid for just less of 2 months now (which a drop was a reboot)... that would have been the same ip through the stretch.

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johnr

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#1093996 23-Jul-2014 07:24

They don't change every 5 min and 98% of connections don't require a static IP

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#1093998 23-Jul-2014 07:43

My guess it that it's just a relic of the dialup days. As noted above, some ISPs don't bother with dynamic addressing anymore; it doesn't really make sense with an always-on connection.

hamish225

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#1094039 23-Jul-2014 09:41

johnr: They don't change every 5 min and 98% of connections don't require a static IP

about the same time i changed to the unlimited plan, maybe just before my connection randomly started dropping every few days and i have to go into pfsense and manually connect it again.

this causes my ip to change. it was the same for about 5 years but not anymore.

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Dratsab

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#1094085 23-Jul-2014 10:50

johnr: They don't change every 5 min and 98% of connections don't require a static IP

I think hamish225 was looking for effect so he exaggerated. He must've been told a million times not to do this... :-)

Some people, especially users of overseas DNS services, would like static a IP though.

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hamish225

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#1094106 23-Jul-2014 11:03

Dratsab:
johnr: They don't change every 5 min and 98% of connections don't require a static IP

I think hamish225 was looking for effect so he exaggerated. He must've been told a million times not to do this... :-)

Some people, especially users of overseas DNS services, would like static a IP though.

yeah every 5 minutes is exaggerating but it does change every few days to a week, slingshot were looking into it but i haven't heard anything.

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chevrolux

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#1094170 23-Jul-2014 12:45

I feel like some of the reason they use a dynamic range is because it is a stipulation that comes from APNIC for using the IP range - not sure where I read it and if it applies to all the ISP's.

They get given a range they are allowed to statically allocate and the rest has to be dynamically allocated.

To be fair it is very easy to get a static IP, you just have to pay for it.

Unotelly has DynDNS support so I guess you could weigh up the cost of a static address with your ISP compared to a DynDNS sub. I would suggest that is more than suffiucient for residential users. It's really only businesses running, mail, web, vpn servers etc that need a proper static IP.

sidefx

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#1094173 23-Jul-2014 12:54

l43a2: well with Telecom on most plans a static IP is free so the money thing kinda goes out the window :P

Interesting, I did not know this. Is it fully static or just sticky though?

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raytaylor

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#1094790 24-Jul-2014 11:16

Pretty sure our two /22 blocks dont have any such stipulation.
Maybe its something older?
We only became APNIC members about 3 years ago.

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#1095201 24-Jul-2014 20:10

Sent an email to Vodafone customer service about obtaining a static IP. They want $20.42/month (incl GST) for assigning one of these. Ridiculous.

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hio77

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#1095203 24-Jul-2014 20:12

Dratsab: Sent an email to Vodafone customer service about obtaining a static IP. They want $20.42/month (incl GST) for assigning one of these. Ridiculous.

yep.. vodafones are pretty steep.. IIRC it comes as a package rather than just the IP however.

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MattR

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#1097025 28-Jul-2014 12:19

It has nothing to do with APNIC.

While I agree it looks a bit silly to do dynamic with always-on internet, there is one reason for it (mainly with the larger ISPs). Routing table size.

If your ISP has multiple POPs that you can connect to (eg for redundancy), each POP would have an IP address range assigned to it. This keeps the routing simple with say a /16 or whatever to each POP. Having customers with static IPs means you need a /32 route in the internal routing table for each customer.

mynxnet

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mynxnet

#1097560 28-Jul-2014 23:20

Bring on IPV6 is all I can say.

With that said as @johnr states

98% of connections don't require a static IP

and (@MattR) routing is simpler for the larger ISP's if you don't have to deliver it.

On the flip side things are much simpler for the customer if you do deliver it.

I guess it comes down to a value vs cost exchange.

l43a2

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#1097566 28-Jul-2014 23:38

sidefx:
l43a2: well with Telecom on most plans a static IP is free so the money thing kinda goes out the window :P

Interesting, I did not know this. Is it fully static or just sticky though?

fully static if you request the static IP. doesnt apply to Unlimited plan.

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