extending at the edge

Ben Jencks ben at bjencks.net
Wed Oct 10 23:57:47 CEST 2012

On 10/10/2012 04:48 PM, Daniel Roesen wrote:
> On Wed, Oct 10, 2012 at 05:11:27PM +0200, Gert Doering wrote:
>> Wifi depends on "who offers it" - in DSL- or Cable-Networks, the 
>> approach people seem to agree on is
>>   - RA/SLAAC for assigning a single IPv6 address to the WAN side of the router
>>   - DHCP-PD for delegating a /56 ("something useful") to the router, for 
>>     use on the LAN side.  Whether that is a /56 or /48 or /60 depends on the
>>     ISP, but "/56" seems to be some sort of common ground for home.
> Cable (DOCSIS) networks use DHCPv6 to assign CPE/WAN addresses, not
> SLAAC. LAN prefixes are delegated via DHCPv6-PD indeed.

In my area, Comcast doesn't assign global addresses on the WAN side at
all. You use RAs to get a default route to a link-local address, and
DHCP-PD to get your LAN prefix, and that's it.


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