[afnog] Subscriber Management with BNG

[Vincent Mwamba]

Thank you Mark for the response, Cisco have IPoE which is DHCP based we will be looking at it. 

Thanks 

Vincent 



From: "Mark Tinka" <mark.tinka at seacom.mu> 
To: "Vincent Mwamba" <vincent at africonnect.co.zm>, afnog at afnog.org 
Sent: Tuesday, 19 January, 2016 13:00:40 
Subject: Re: [afnog] Subscriber Management with BNG 



On 19/Jan/16 09:33, Vincent Mwamba wrote: 




Hi, 

We are in the process of installing Broadband network gateways(BNG) on ASR9k for subscriber management in the access network using PPPoE and IPoE. 
We have a few concerns we would like some help with. 



BNG implementations can sometimes be very vendor-specific (which is not necessarily a bad thing), because this infrastructure is extremely involved, with lots of moving parts. 

My advice would be to spend 95% of your time working with your vendor to get them to provide solutions to your problems. Some of the things you want to do will be difficult to do in a multi-vendor BNG scenario. Given how sensitive this kind of infrastructure is, I'd recommend working with a vendor you're comfortable with. 


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1. How can we achieve Geo-redundancy without using proprietary cisco technology (nV cluster / Geo loacation) if possible. 

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Look at PPPoE Smart Server Selection. Not sure of its support in IOS XR. 

However, I prefer DHCP to PPPoE, so check with Cisco if they have something similar. 


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2. How can we have users dialing at any of the (2) locations and still get the same IP address. 

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I'd check with Cisco. 


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3. We have the BNGs connected directly to the Core network, is it okay to have the /32s at the point of entry into the core(about 5k routes). with this it allows a customer to dial from any location and pick the same address. 

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It's fine, as long as you keep this in your iBGP. 

Pre-assigning an address pool for each BNG scales better, but it means IP addresses could be different depending on which BNG the customer connects to. 



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4. If the third point is not best practice how can we summarize without introducing other devices. 

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As above. 


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5. Any other help is appreciated 

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If you can, focus on DHCP. PPPoE is old school, and introduces limitations that could hurt you in the future. 

Mark. 

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