There are still bugs in network vendor hardware. That said, you shouldn't let that stop you from deploying IPv6[0]. It's mainly little things like you can't add

There are still bugs in network vendor hardware. That said, you shouldn't let that stop you from deploying IPv6[0]. It's mainly little things like you can't address a serial link as /127 (Hello HP). You should allocate a /64, but address it /127. There's a major bug on A10 load balancers where the ICMP "too big" message is ignored for virtual servers. There is currently no fix. If you run A10, you can't run IPv6. [0] Unless you run A10 gear.