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Debug PPP of SSG5 dial-up connection

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Article ID: KB12904 KB Last Updated: 06 Aug 2010Version: 2.0
Summary:
Example of successful PPP negotiation with ISP on SSG5 with built-in v.92 modem.
Symptoms:
Describe steps in PPP negotiation.

Example is connecting to ATT dialup account on SSG5 running ScreenOS 5.4.0r10.
Solution:
On a High-Level:
                                  
Step1: LCP: Link Control Protocol
Step2: Auth: PAP or CHAP
Step3: IPCP: IP Control Protocol
Step4: LQR: Link Quality Report Protocol

STEP 1 - LCP:
## 2009-01-10 20:44:40 : SEND DECODE:(DIAL-UP) ***[LCP ConfReq <MRU 1514> <ASYNCMAP 0x0> <MAGIC 0x6d82543f>]***
## 2009-01-10 20:44:40 : RECV DECODE:(DIAL-UP) ***[LCP ConfReq <MRU 1514> <ASYNCMAP 0x0> <AUTH UPAP> <MAGIC 0xa4d0f466><PCOMP> <ACCOMP> <MRRU 1514> <EndPoint [null]>]***
## 2009-01-10 20:44:40 : SEND DECODE:(DIAL-UP) ***[LCP ConfRej <PCOMP> <ACCOMP> <MRRU 1514>]***
## 2009-01-10 20:44:40 : RECV DECODE:(DIAL-UP) ***[LCP ConfAck <MRU 1514> <ASYNCMAP 0x0> <MAGIC 0x6d82543f>]***
## 2009-01-10 20:44:40 : RECV DECODE:(DIAL-UP) ***[LCP ConfReq <MRU 1514> <ASYNCMAP 0x0> <AUTH UPAP> <MAGIC 0xa4d0f466>]***
## 2009-01-10 20:44:40 : SEND DECODE:(DIAL-UP) ***[LCP ConfAck <MRU 1514> <ASYNCMAP 0x0> <AUTH UPAP> <MAGIC 0xa4d0f466>]***

STEP 2 - Auth:
## 2009-01-10 20:44:40 : SEND DECODE:(DIAL-UP) ***[PAP AuthReq ID=0x1 USER="xxxxxxxx@sbcglobal.net" PASSWORD="xxxxxx"]***
## 2009-01-10 20:44:41 : RECV DECODE:(DIAL-UP) ***[PAP AuthAck ID=0x1MSG=""]***

STEP 3 - IPCP:
## 2009-01-10 20:44:41 : SEND DECODE:(DIAL-UP) ***[IPCP ConfReq ID=0x1 <ADDR 0.0.0.0> <DNS_P 0.0.0.0> <DNS_S 0.0.0.0> <NBNS_P 0.0.0.0> <NBNS_S 0.0.0.0>]***
## 2009-01-10 20:44:41 : RECV DECODE:(DIAL-UP) ***[IPCP ConfReq ID=0x3 <COMPRESS VJ 0f 01> <ADDR 1.1.1.7>]***
## 2009-01-10 20:44:41 : SEND DECODE:(DIAL-UP) ***[IPCP ConfRej ID=0x3 <COMPRESS VJ 0f 01>]***
## 2009-01-10 20:44:41 : RECV DECODE:(DIAL-UP) ***[IPCP ConfRej ID=0x1 <NBNS_P 0.0.0.0> <NBNS_S 0.0.0.0>]***
## 2009-01-10 20:44:41 : SEND DECODE:(DIAL-UP) ***[IPCP ConfReq ID=0x2 <ADDR 0.0.0.0> <DNS_P 0.0.0.0> <DNS_S 0.0.0.0>]***
## 2009-01-10 20:44:41 : RECV DECODE:(DIAL-UP) ***[IPCP ConfReq ID=0x4 <ADDR 1.1.1.7>]***
## 2009-01-10 20:44:41 : SEND DECODE:(DIAL-UP) ***[IPCP ConfAck ID=0x4 <ADDR 1.1.1.7>]***
## 2009-01-10 20:44:41 : RECV DECODE:(DIAL-UP) ***[IPCP ConfNak ID=0x2 <ADDR 2.2.2.228> <DNS_P 3.3.3.1> <DNS_S 3.3.4.1>]***
## 2009-01-10 20:44:41 : SEND DECODE:(DIAL-UP) ***[IPCP ConfReq ID=0x3 <ADDR 2.2.2.228> <DNS_P 3.3.3.1> <DNS_S 3.3.4.1>]***
## 2009-01-10 20:44:41 : RECV DECODE:(DIAL-UP) ***[IPCP ConfAck ID=0x3 <ADDR 2.2.2.228> <DNS_P 3.3.3.1> <DNS_S 3.3.4.1>]***

STEP 4- LQR:
## 2009-01-10 20:44:46 : SEND DECODE:(DIAL-UP) ***[LCP EchoReq 6d 82 54 3f]***
## 2009-01-10 20:44:46 : RECV DECODE:(DIAL-UP) ***[LCP EchoRep a4 d0 f4 66]***
## 2009-01-10 20:44:51 : SEND DECODE:(DIAL-UP) ***[LCP EchoReq 6d 82 54 3f]***
## 2009-01-10 20:44:51 : RECV DECODE:(DIAL-UP) ***[LCP EchoRep a4 d0 f4 66]***
## 2009-01-10 20:44:56 : SEND DECODE:(DIAL-UP) ***[LCP EchoReq 6d 82 54 3f]***
## 2009-01-10 20:44:56 : RECV DECODE:(DIAL-UP) ***[LCP EchoRep a4 d0 f4 66]***
## 2009-01-10 20:45:01 : SEND DECODE:(DIAL-UP) ***[LCP EchoReq 6d 82 54 3f]***
## 2009-01-10 20:45:02 : RECV DECODE:(DIAL-UP) ***[LCP EchoRep a4 d0 f4 66]***
## 2009-01-10 20:45:06 : SEND DECODE:(DIAL-UP) ***[LCP EchoReq 6d 82 54 3f]***
## 2009-01-10 20:45:06 : RECV DECODE:(DIAL-UP) ***[LCP EchoRep a4 d0 f4 66]***


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