Re: [dhcwg] DHCPv6 router option

[Iljitsch van Beijnum <iljitsch at muada.com>]

On 11 mrt 2009, at 19:13, Howard, Lee wrote:

> One predictable solution is to have the client
> request a default router from DHCP if not learned through RA.  I
> haven't worked through the timing there; possible race condition or
> delay in configuration.

If a network runs without RAs then clients would be forced ot ask for  
this option, if clients ask for it administrators will turn of RAs...  
This pushes towards the situation where clients must enable all  
options, which is rather suboptimal.

How about this:

If the DHCPv6 server says to use an address, then:

- if there are no RAs, use the address
- if there are RAs that include the address, use the address
- if there are RAs but they don't include the address, use the RAs

However, this doesn't solve the issue for clients to decide when to  
use DHCPv6. Normally the MO bits in RAs tell them to, but without RAs  
no MO bits.