[j-nsp] PPP Negotiation Issues

[Ben Bird]

Jason,

JUNOS supports global class 2 (IP address) and class 1 (local) endpoint
discriminator options.  Class 3 (MAC ID) is not supported by JUNOS.

Endpoint discriminator is not required in order to negotiate MLPPP.  The
Juniper is sending a Conf-Reject for that option, as expected.


Regards,
Ben



On Fri, 24 Apr 2009 12:21:18 -0600, Jason Iannone
<jason.iannone at gmail.com> wrote:

>All,
>
>I'm having trouble understanding a PPP Negotation issue with a single
>T1 on a Multilink interface.  The Juniper appears to be rejecting an
>LCP configuration option including a MAC address received from an
>Adtran.  I haven't been able to find a reference in RFC 1661
>indicating that "End-Disc" is a valid option.  This is the second time
>we've seen this issue and I'm not sure if I'm digressing from the real
>issue or if I should continue to pursue this.
>
>The following debugs were from the same ~20 second period.  The Adtran
>never indicates that it has received an LCP message, while the Juniper
>both transmits and receives.  In the interest of brevity, I have
>removed all but two cycles of configure reject messages from the
>Juniper monitor traffic interface detail output.
>
>
>Adtran PPP debug:
>
>2009.04.24 17:40:08 PPP.NEGOTIATION PPPtx[t1 1/1] LCP: Conf-Req
>ID=152 Len=23 MAGIC(027e2bf2) MRRU(1520) ED(3:00a0c84068c2)
>2009.04.24 17:40:12 PPP.NEGOTIATION PPPtx[t1 1/1] LCP: Conf-Req
>ID=153 Len=23 MAGIC(027e2bf2) MRRU(1520) ED(3:00a0c84068c2)
>2009.04.24 17:40:16 PPP.NEGOTIATION PPPtx[t1 1/1] LCP: Conf-Req
>ID=154 Len=23 MAGIC(027e2bf2) MRRU(1520) ED(3:00a0c84068c2)
>2009.04.24 17:40:20 PPP.NEGOTIATION PPPtx[t1 1/1] LCP: Conf-Req
>ID=155 Len=23 MAGIC(027e2bf2) MRRU(1520) ED(3:00a0c84068c2)
>2009.04.24 17:40:24 PPP.NEGOTIATION PPPtx[t1 1/1] LCP: Conf-Req
>ID=156 Len=23 MAGIC(027e2bf2) MRRU(1520) ED(3:00a0c84068c2)
>2009.04.24 17:40:28 PPP.NEGOTIATION PPPtx[t1 1/1] LCP: Conf-Req
>ID=157 Len=23 MAGIC(027e2bf2) MRRU(1520) ED(3:00a0c84068c2)
>2009.04.24 17:40:32 PPP.NEGOTIATION PPPtx[t1 1/1] LCP: Conf-Req
>ID=158 Len=23 MAGIC(7bb2b1cf) MRRU(1520) ED(3:00a0c84068c2)
>2009.04.24 17:40:32 PPP.NEGOTIATION PPPtx[t1 1/1] LCP: Conf-Req
>ID=159 Len=23 MAGIC(7bb2b1cf) MRRU(1520) ED(3:00a0c84068c2)
>
>---
>
>Juniper debug:
>
>17:40:08.685156  In LCP, Conf-Request (0x01), id 152, length 25
>        encoded length 23 (=Option(s) length 19)
>          Magic-Num Option (0x05), length 6: 0x027e2bf2
>          MRRU Option (0x11), length 4: 1520
>          End-Disc Option (0x13), length 9: MAC 00:a0:c8:40:68:c2
>17:40:08.685294 Out LCP, Conf-Reject (0x04), id 152, length 15
>        encoded length 13 (=Option(s) length 9)
>          End-Disc Option (0x13), length 9: MAC 00:a0:c8:40:68:c2
>17:40:11.382693 Out LCP, Conf-Request (0x01), id 53, length 27
>        encoded length 25 (=Option(s) length 21)
>          MRU Option (0x01), length 4: 1514
>          Magic-Num Option (0x05), length 6: 0x49fc248a
>          MRRU Option (0x11), length 4: 1504
>          End-Disc Option (0x13), length 7: IPv4 64.129.252.137
>17:40:12.684943  In LCP, Conf-Request (0x01), id 153, length 25
>        encoded length 23 (=Option(s) length 19)
>          Magic-Num Option (0x05), length 6: 0x027e2bf2
>          MRRU Option (0x11), length 4: 1520
>          End-Disc Option (0x13), length 9: MAC 00:a0:c8:40:68:c2
>17:40:12.685070 Out LCP, Conf-Reject (0x04), id 153, length 15
>        encoded length 13 (=Option(s) length 9)
>          End-Disc Option (0x13), length 9: MAC 00:a0:c8:40:68:c2
>
>
>
>
>Thanks for your time,
>
>Jason
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