Latest AirPort Extreme (Model Number A1521) does not work with IPv6 of ISP

Originator:nico.rohrbach
Number:rdar://22341221 Date Originated:19-Aug-2015
Status:Open Resolved:
Product:Hardware Product Version:AirPort Extreme 802.11ac (A1521, 7.7.3)
Classification:Serious Bug Reproducible:Always
 
## Summary:

Local Internet service provider (via Glass Fiber) supports IPv6 and hand out IPv6 adresses via DHCPv6 Prefix Delegation.

If I connect any of my Mac's directly to the Fiber to Ethernet Converter, everything works fine and I get an IPv6 address.

However, if I make the same connection to my AirPort Extreme's WAN port, the AirPort Extreme does not 'receive' an IPv6 address. The relevant settings are as follows:

Configure IPv6: Automatically
IPv6 Mode: Native
Enable IPv6 Connection Sharing: Active

For other customers of my ISP, IPv6 seems to work fine with other home routers. Since everything also works fine when directly connected to a Mac, this must be an issue with the AirPort base stations.

## Steps to Reproduce:

1. Connect an AirPort Base Station to an ISP that hand out IPv6 adresses via DHCPv6 Prefix Delegation.
2. Enable IPv6.

## Expected Results:

The AirPort base station should receive an IPv6 address.

## Actual Results:

The AirPort base station does not receive an IPv6 address.

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