[Dnsmasq-discuss] [PATCH] Don't advertise a default v6 route with no routeable prefixes

[Chris Webb]

Lonnie Abelbeck <lists at lonnie.abelbeck.com> wrote:

> For years I have used only ULAs for local networks (and VPNs) and at the  
> edge enable Network Prefix Translation (NPTv6) to assign static local  
> routable IPv6 subnets to have their prefix mapped 1:1 to Global Unicast  
> Addresses (GUA) for global Internet access.

Interesting. I agree this setup wants a default route despite being  
entirely ULA, and therefore argues against unconditionally zeroing the  
lifetime.

Conversely, with the current behaviour, a router that has no v6  
connectivity but wants to provide a ULA prefix locally will incorrectly  
configure clients with an invalid v6 default route.

Looks like a general solution needs explicit configuration rather than an  
unconditional behaviour change like I'm able to use locally.

Best wishes,

Chris.