Re: [bcause] PFCP not equal to FMC, Why not choose PFCP

[Richard Patterson <[e-mail]>]

Hi Song Jun,

Thanks for your detailed email.

I think a lot of people will have queries around this particular statement
of yours regarding PFCP:
ü  We found that nearly all requirements of BNG were needed to extended in
current protocol. That seems to rewrite a new protocol.

Could you please elaborate on this statement?   Where do you see that PFCP
is deficient for fixed line BNG?
If you've got detailed analysis of this, this would be great to see
publicly. From what I've heard, PFCP is easily extendable to satisfy the
requirements for fixed-line BNG.

You also make the assertion:  ü  IETF is the right place to define a
protocol for BNG, 3GPP is the right place to extend PFCP.
There is precedent already for the BBF extending protocols such as DHCP and
PPPoE with various options.   I think we need to properly understand the
extent of how PFCP needs to be extended, in order to decide where best to
make the extension, or if we should just build a new protocol.   I do
however agree that if it's more than a small extension required, then
perhaps the IETF should start from scratch, but I don't see this right now.

-Richard