Re: Understanding IPv6-PD over PPPoE

On 16/06/2021 10:36, Andrei Borzenkov wrote:

SLAAC is used by your own system, not ISP. ISP sends RA. Your system
uses SLAAC to build address using these RA. You yourself said they are
present (you mentioned M an O flags).

SLAAC is only supposed to be performed if the RA's M flag is not set. I don't think I've ever seen an ISP offering IPv6 without setting the M flag. When the M flag is set, the client is expected to use DHCPv6 instead of SLAAC.

Do you mean these RAs do not contain any valid prefix?

Correct, they do not contain a prefix and set the M flag.

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