Re: IPv6 ND stateful address autoconfiguration

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

On 7 dec 2007, at 1:14, Sandeep P A wrote:

> Router Discovery fails when no default router is found (NO VALID RA  
> WITH
> NON-ZERO LIFETIME IS RECEIVED).

> Host assumes that there is no router in the network for the purpose of
> autoconfiguration and tries to check for stateful ways to get an  
> address for
> itself When NO VALID RA IS RECEIVED.

You may want to consider whether it's useful to do this.

DHCPv6 CAN give you an address (although unlike with DHCP for IPv4,  
not every DHCPv6 server is configured to do so) but it can't give you  
a subnet prefix length or a default gateway, so local communication  
will have to depend on the "on-link assumption" which is considered a  
security flaw by many and has the potential to cause timeouts when  
trying to communicate with IPv6 destinations. And non-local  
communication won't be possible.

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