Seeing you are using basically the same setup, is you bandwidth consistent?? I'm seeing differences during the day as to bandwidth. bought a 12 meg connection and I see lows around 5 and highs around 22..
No issues re tunnel, but, I do have a few routing issues of my own. I seem to not be able to route from the sub interfaces below my top level router. I have to manually go in and establish static routes in order for the data to get out. Kinda sucks. I thought that what routing protocols did..
My bandwidth is pretty consistent but that sort of thing is very ISP dependent. Unlike DSL which uses a dedicated circuit, bandwidth on a DOCSIS system is shared between hosts on either the same cable node or the same headend depending on how your ISP's DOCSIS network is structured. So when you see reduced speeds its probably because too many other people in your neighborhood are watching Netflix or whatever.
IOS routers can use RIPv6, EIGRP, OSPFv3, and BGP to dynamically exchange IPv6 routing information. IPv6 support for different routing protocols was added in different IOS releases so if you need a specific one you might want to check the IOS feature navigator on Cisco's web site. However the PIX/ASA cannot run a dynamic routing protocol in IPv6, they can only use static routes.
According to this post
you should be able to run an IPv6 capable 12.4 image with the firewall feature set on your 3640 if your router has enough RAM and you can get your hands on the firmware image itself. Also, while you certainly can use an IOS router to filter IPv6 traffic even a PIX will outperform all but the newest and fastest routers when doing stateful firewall work.
Higher layer protocols like TCP, UDP, SSH, and HTTP are the same in IPv6 as they were in IPv4 so generally you will be filtering the same things for the same reasons. The only thing that is really different is ICMP, which should not be filtered at all in IPv6 in my opinion.
Is 8.4 out?Yep.