[AusNOG] NBN Q

[Dino Sosic]

Thanks guys. I thought it would be something like that, but not a lot of info out there specific for NBN services. :)

From: Paul Julian [mailto:paul at oxygennetworks.com.au]
Sent: Wednesday, 14 October 2015 8:05 AM
To: Dino Sosic <Dino.Sosic at datacom.com.au>; ausnog at lists.ausnog.net
Subject: RE: [AusNOG] NBN Q

Hi Dino, some ISP's do it different to others, some use PPPOE, some use DHCP, it just depends on what they want to do.

For an NBN directly connected ISP they take a VLAN from NBN for each CVC on each POI they connect to, then each customer is allocated a VLAN within the CVC VLAN, so you have layer 2 separation between customers, really whether you use PPPOE or DHCP there is no difference to separation, it's a matter of choice for ISP's, unless they use an aggregator which only offers one option like Telstra Wholesale, at present they run their wholesale NBN network over the top of their retail NBN network, they only offer DHCP.

Regarding the auth, there is no auth when using DHCP necessariy, but you can use radius and DHCP to do it if you want, then just do the accounting based on the IP they are allocated, you can also allocate IP based on the CVC ID which is presented by NBN, you can set that up as a radius check attribute so that you can control various aspects of the session at connection time.

Regards
Paul

From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Dino Sosic
Sent: Wednesday, 14 October 2015 8:28 AM
To: ausnog at lists.ausnog.net<mailto:ausnog at lists.ausnog.net>
Subject: [AusNOG] NBN Q

Hi guys,

Quick question about the NBN deployment. I am looking for a technical answer here. Some NBN services give you a public IP via DHCP and they push a default route with it. How are the customers separated and how is the same IP leased to the same NBN endpoint every time? Is this something that is different from ISP to ISP or? There is no auth on the endpoint, and it can't be the MAC either.

I'm surprised how little people/engineers really know about the fine works of NBN deployment. ( especially the ISP engineers )

Thanks,

Dino

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