Testing 8.3.112 - Any IPv6 issues noticed?

[Matthew Peterman]

Hello all!

I am testing 8.3.112 and I am finding that clients are not reliably getting IPv6 addresses. On 8.2.130 clients reliably (as in always) get an IPv6 address (using SLAAC) and see the RAs from the router, however on 8.3.112 I am finding that some clients see the RAs and others do not. For example I have 2 15" MacBook Pro's, both the exact same 2014 model, joining the same SSID, same AP, and one sees RAs and the other does not and as such 1 does not get an IPv6 address. I am seeing similar behavior on iOS devices where about 75% get a v6 address but the other 25% do not. Weird thing is if the client disconnects and re-joins, it may get a v6 address or it may not. I figure I will open a TAC case, but wanted to know if anyone else had seen this behavior or had any ideas of things to check. 

[Matthew Peterman]

So in reading the config guide for IPv6 clients in 8.x it is giving me the impression IPv6 needs to be enable on the network the APs are on as well? Is this true? The WLC has an IPv6 address on the management interface (as well as a v4 address) however the APs are on a different network and only get v4 addresses. I can add a v6 network on the AP VLAN if needed but I didn't think it was necessary.