Have any of you tested IPv6 on your network for end users? Currently testing a patch for dhcpd with mysql and the council is working stably. Jendak noticed a difference in the downlink for example from the ftp ipv6 not go more than 25 MB/s (by ipv4 transfer is about 45 mB/s). Do you have similar problems?
We've had dual-stack running on our cable network for probably 18 months. ubr10k CMTS. Earlier IOS had some limitations with speed (IPv6 wasnt processed in hardware). But the more recent ones run pretty well (we currently have SCF4). No problems with speed that I have seen.
The only annoying limitation for us is the lack of IPv6 netflow support.
Do you have your units right when you are talking 25 and 45 MB/sec? Thats some pretty serious speed!