On 29/03/2017 09:02, Gert Doering wrote:
Hi,
On Wed, Mar 29, 2017 at 08:14:59AM +0200, Jan Zorz - Go6 wrote:
For a PPPoE link these issues are trivially solved to leaving the link unnumbered.
Again, for those, using a PPPoE dialer that would not work. If you are 100% sure that nobody in your network is connecting using a PPPoE dialer,
... and your CPEs can cope with having no GUA on the WAN link (like, for doing DNS lookups, or such). They *should*, but ...
Hey, I'm absolutely not a fan of unnumbered links, to make it clear. However, CPE with unnumbered WAN link will receive a prefix delegation and from this point on, there are many different implementations on different CPEs - some will take first /64 and number the loopback, some will not and just start numbering L3 ports and so on - but as soon as one interface is numbered from PD - CPE uses that to doe DNS and other stuff. Cheers, Jan
then yes, go ahead with unnumbered.
Gert Doering -- NetMaster