[LINK] RFI: Geolocation based on IP-Address
dlochrin at d2.net.au
Thu Sep 27 14:21:44 EST 2007
On Thursday 27 September 2007 13:10, Paul Brooks wrote:
> In a service using Telstra Wholesale Layer2 ADSL, the IP address is
> allocated by the ISP, not by Telstra. Interconnect is in the capital
> cities, so usually it will be in state-based blocks - a particular
> address might allocated to someone anywhere within ACT, while a
> Brisbane-based IP address might be re-allocated to another service
> anywhere in QLD, but not Canberra.
So packets (PPPoE?) go all the way back to the ISP's nearest router in order to begin the routing process? Or does Telstra allocate an IP address at the local exchange from the ISP's subnet on behalf of the ISP? This is something I've never been sure about.
If the former and the ISP only has a point of presence at their head office, then all packets must be routed via there, even if the end-points are 100 metres apart on the other side of the country?
This is the only way I could imagine a /32 address could be allocated randomly between states as Adrian Chad suggests sometimes happens.
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