Nowadays it is no only recommended but it has become almost mandatory to deliver IPv6 to our customers. Among all the v4 / v6 migration techniques, the most used is the delivery of the dual-stack.
Problem:
Many users have already come to me with a simple problem, but while unresolved, prevents the adoption of IPv6 dual-stack at an ISP, as it makes it impossible to register IPv6 PD for future tracking in the event of a legal request.
The problem identified is that the registration of IPv4 and IPv6 delivered to the user is carried out only in the accounting start package sent to Radius.
Many of the CPE and ONT routers take longer to complete the IPv6 and Prefix-Delegation (PD) association process than they do for the same IPv4 process. With that, we realized that the sending of accounting to the radius is done before the entire IPv6 association process occurs, causing the registration of only the IPv4 that was provided and losing the IPv6 PD information.
Solution:
The solution is very simple and presents itself as a single command applied to the domain configuration.
aaa
...
domain xpto
...
accounting-start-delay 40 online user-type ppp
This command forces the NE20 / 40/8000 to wait 40 seconds before sending the accounting-start package, which makes us sure that we have had enough time for the customer's equipment, regardless of brand, model or capacity, to carry out the entire IPv6 process.
We have already applied this solution to more than 10 customers and have not seen any negative effect on the functioning of the environment.
I ask you to comment on your experience with what has been described so that we can build more knowledge for the community.
Regards,
#MVE
#HuaweiEnterpriseCommunity
