[c-nsp] Per-host IP assignment for L2TP clients to LNS ASR

[Pawlowski, Maciej]

Hi,

I thought about this, but I'm not sure if PPP/L2TP session is similar to other PPP (I have no experience with L2TP).

I don't want to start from scratch - maybe you can advice me where can I find some information how FreeRadius should be configured for L2TP - is it visible for radius like other kinds of PPP sessions?

Thanks again

Maciek

-----Original Message-----
From: Christian Kratzer [mailto:ck-lists at cksoft.de] 
Sent: Monday, January 09, 2012 11:19 PM
To: Pawlowski, Maciej
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Per-host IP assignment for L2TP clients to LNS ASR

Hi,

On Mon, 9 Jan 2012, Pawlowski, Maciej wrote:
> Hi,
>
> We are going to set-up ASR1001 router for terminating PPP sessions from CPE devices via L2TP.
>
> We must provide per-host IP reservation for each CPE (CPE might be preconfigured first). For some reasons ($:) ) we are looking for using DHCPd instead of CSACS.

why do you need dhcp just to get rid of Cisco Secure Access Control Server ?

Why not just use a different radius server for ppp aaa and be done with it. FreeRadius or Radiator would both do the job. And PPP with IPCP just sounds a lot more natural for L2TP than DHCP does.

Greetings
Christian

> 1. Does IOS-XE support relay of IPCP (or DHCP) requests from PPP clients to DHCP server ?
> 2. Which parameters are forwarded to DHCP server - the point is how DHCPd can identify particular CPE ?
>
> I don't have a lot of experience on this topic, so the help is appreciated.
>
> What about using FreeRadius for this ?

>
> Cheers,
>
> Maciek
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Christian Kratzer                      CK Software GmbH
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