Re: ISDN trace - bafflement

Bill Lutton (whl@pageplus.com)
Wed, 09 Oct 1996 18:23:31 GMT

John,

On Wed, 9 Oct 1996 08:57:25 -0700 (PDT), you wrote:
>Pms do not authenticate themselves to the remote end via PAP.
>don't think they authenticate to dial in connections at all.

Thanks for your comments. It looks like I had it kind of backwards.
If I understand your corrections, an LCP request is more like
saying: "I'm expecting you do talk to me this way..." rather than
saying: "I'm willing to talk to you this way..." --- true?

If so, (and paraphrasing your corrections) are these interpretations
more correct?

>> >Found Livingston dump format
>> >Sending LCP_CONFIGURE_REQUEST to port S22 of 14 bytes containing:
>> >01 01 00 0e 05 06 2f 4d 9c 83 03 04 c0 23=20
>> >Sent to port S22: 16 bytes LCP Request-1=20
>> > Magic-Number =3D 0x2f4d9c83
>> > Authentication-Protocol =3D PAP=20

PM says: I'm expecting a (simple) single link PPP connection
and I expect you to authenticate using PAP.

>> >Received LCP_CONFIGURE_REQUEST on port S22 of 12 bytes containing:
>> >01 01 00 10 11 04 05 f6 01 04 05 f6 08 02 07 02=20
>> >Fixed #bytes to match #found...
>> >Recvd from port S22: 18 bytes LCP Request-1=20
>> > MP-MRRU =3D 1526
>> > Max-Recieve-Unit =3D 1526
>> > Addr-and-Ctl-Field-Comp
>> > Protocol-Field-Comp=20
=20
Remote says: I want you to talk to me using MP (among other stuff).
(As usual, the remote does not requre the PM to authenticate)

Re: LCP Open
Once one side of the link converges, would it (could it) be renegotiated
or is it then "locked down"?

Thanks for your insight,
Bill