On 14-sep-2007, at 21:06, Kevin Loch wrote:
DHCPv6 without manual configuration or RAs doesn't work because DHCPv6 can't tell you your default gateway.
That can be fixed (and I'm sure it will).
"Fixed" in the sense of "work better than today" is not possible, in my opinion.
Having routers announce their presence makes sure all kinds of trouble that can easily occur with IPv4 isn't an issue with IPv6.
Look at that, someone bothered to do work on VRRP for IPv6. That was a waste of time, because router advertisements and dead neighbor detection give you the same functionality without the need to configure stuff.
RA's are great in certain situations, and I use it on some subnets but we must have a full set of tools that work with RA turned off.
Why?
There are situations where I cannot have hosts (servers in particular) autoconfigure addresses or gateways, even accidentally.
Then they shouldn't listen to discovery protocols such as RA but also DHCP (and VRRP in the sense that you were suggesting although VRRP isn't designed to be that).
I'm not sure what implementations will do when a statically configured default fails (succeeds?) dead neighbor detection...