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Sat-link problem

Unanswered Question
Nov 14th, 2002
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I´ve a 3Com Superstack II Netbuilder 227, and another side a router Cisco 3640.

Both routers has configured over ppp, crc 16


But the ppp negotiation never complete. The debug ppp negotiation output is:



7w3d: Se1/1 LCP: O CONFREQ [ACKsent] id 247 len 10

7w3d: Se1/1 LCP: MagicNumber 0x11DA0A23 (0x050611DA0A23)

Don_Bosco#

7w3d: Se1/1 LCP: I CONFREQ [ACKsent] id 96 len 14

7w3d: Se1/1 LCP: MRU 1524 (0x010405F4)

7w3d: Se1/1 LCP: MagicNumber 0xD5A0D282 (0x0506D5A0D282)

7w3d: Se1/1 LCP: O CONFACK [ACKsent] id 96 len 14

7w3d: Se1/1 LCP: MRU 1524 (0x010405F4)

7w3d: Se1/1 LCP: MagicNumber 0xD5A0D282 (0x0506D5A0D282)

7w3d: Se1/1 LCP: I IDENTIFY [ACKsent] id 96 len 64 magic 0x00000000 VI=3COM SP=S

W/NBRO-CF,10.1.0.27 SV=version 10.1.0.27 CI=

7w3d: Se1/1 LCP: I IDENTIFY [ACKsent] id 106 len 64 magic 0x00000000 VI=3COM SP=

SW/NBRO-CF,10.1.0.27 SV=version 10.1.0.27 CI=

7w3d: Se1/1 LCP: I CONFREQ [ACKsent] id 96 len 14

7w3d: Se1/1 LCP: MRU 1524 (0x010405F4)

7w3d: Se1/1 LCP: MagicNumber 0xD5A0D282 (0x0506D5A0D282)

7w3d: Se1/1 LCP: O CONFACK [ACKsent] id 96 len 14

7w3d: Se1/1 LCP: MRU 1524 (0x010405F4)

7w3d: Se1/1 LCP: MagicNumber 0xD5A0D282 (0x0506D5A0D282)

7w3d: Se1/1 LCP: I IDENTIFY [ACKsent] id 116 len 64 magic 0x00000000 VI=3COM SP=

SW/NBRO-CF,10.1.0.27 SV=version 10.1.0.27 CI=

7w3d: Se1/1 LCP: I CONFREQ [ACKsent] id 96 len 14

7w3d: Se1/1 LCP: MRU 1524 (0x010405F4)

7w3d: Se1/1 LCP: MagicNumber 0xD5A0D282 (0x0506D5A0D282)

7w3d: Se1/1 LCP: O CONFACK [ACKsent] id 96 len 14

7w3d: Se1/1 LCP: MRU 1524 (0x010405F4)

7w3d: Se1/1 LCP: MagicNumber 0xD5A0D282 (0x0506D5A0D282)

7w3d: Se1/1 LCP: TIMEout: State ACKsent


I can´t configure PPP Timeout on router 3Com.


any idea??


note: mi sat link is a V-sat 512K

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murabi Wed, 11/20/2002 - 14:31
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In your case check whether the Vsat link is always up.


In your debug output whether PPP is establishing and are you able to see this output in the debug ppp negotiation


*Mar 1 00:06:36.665: Se:1 PPP: Phase is ESTABLISHING


If so physical layer is up and next the LCP negotiation begins


In your debug output Timeout message appears in the LCP state, which I think the link is getting disconnected.


What kind of PPP authentication you are using?


If you are using CHAP try it with PAP and check whether the timeout is due to authentication problem.


Most Probably the link is not stable or some mismatch in parameters between the two routers.


Check the following link for debug output and comare yours with this one.


http://www.cisco.com/warp/public/471/debug_ppp_negotiation.html#3

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