[c-nsp] BNG IPv6 Prefix Delegation Accounting

[Sandy Breeze]

Hi Sebastian,

As per 
http://www.cisco.com/en/US/docs/ios/security/command/reference/sec_a1.html, 
have you configured:

The following example shows how to include the delegated-IPv6-Prefix 
profile in the AAA accounting records:
Router(config)# aaa accounting include auth-profile delegated-ipv6-prefix

If not seen specifically in start, you should at least see it in the 
interims? (aaa accounting update periodic <mins>)

Regards
Sandy



On 18/03/13 08:01, Sebastian Graf wrote:
> Hi,
>
> we are currently working on providing IPv6 to residential customers. The BNG used is a Cisco ASR1k running 15.2(2)S1. While most part seem to work out nicely, there is an issue with Adress Accounting and DHCPv6 Prefix Delegation.
>
> It seems that the Accounting Start messages generally do not include the IPv6 Prefix assigned via Prefix Delegation. Only the link local and SLAAC addresses are provided. I guess this is because the PPP session establishment is decoupled from the address assignment with IPv6.
>
> This is no big deal if I provide the prefix from the radius (as I can log it there), however if I tell the ASR to assign an address from a local pool (using Cisco-AVpair = "ipv6:delegated-ipv6-pool=<POOL-NAME>"), there seems to be no way to track which prefix was assigned to which subscriber (which is needed for legal purposes).
>
> Did anybody came across a similar situation or knows if there is a way to log these assignments? Or is the only option in this case to move the pool management to an external server and log it there?
>
> kind regards
> Sebastian
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