[nsp] Connecting Max6000 with Cisco 2500 over HDSL: "line protocolis down"

[Bruce Pinsky]

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Mehmet Ali Suzen wrote:

| Hi There,
| Thanks for the tip indeed. I have checked with debug as you
| suggested. Here is the output;
|
| cyprus-r2#debug ppp negotiation
| PPP protocol negotiation debugging is on
| cyprus-r2#
| 04:12:09: Se0 LCP: TIMEout: State Listen
| 04:12:09: Se0 LCP: O CONFREQ [Listen] id 193 len 15
| 04:12:09: Se0 LCP:    AuthProto CHAP (0x0305C22305)
| 04:12:09: Se0 LCP:    MagicNumber 0x1162C640 (0x05061162C640)
| 04:12:11: Se0 LCP: TIMEout: State REQsent
| 04:12:11: Se0 LCP: O CONFREQ [REQsent] id 194 len 15
| 04:12:11: Se0 LCP:    AuthProto CHAP (0x0305C22305)
| 04:12:11: Se0 LCP:    MagicNumber 0x1162C640 (0x05061162C640)
|

I don't see any input from the other side.  The router is outputing CONFREQ
(configuration request), but never sees a response and timesout.

| And current interface config is as follows.
| Current configuration : 123 bytes
| !
| interface Serial0
|  no ip address
|  encapsulation ppp
|  ppp authentication chap callin
|  ppp chap password 7 1248574446
| end
|
| Actually how to I decide that who initiates PPP? And I heard that
| there is an issue of "clock rate". How can I see in Cisco IoS
| what is the current rate? And should it be identical in modems and
| in the peer.
|

You don't have to decide.  The protocol takes care of initiation based on
which side is seeing what.

The cisco router will take the clock rate from the line in the config you
have shown.  If the modems are correctly configured with the appropriate
speeds and framing on each side, perhaps the Ascend is not configured to
take clock from the line.  You need to be sure that either the line or one
of the routers provides clocking.

Line protocol is down because you have not successfully negotiated PPP on
the link.  Until that happens, it will stay that way.  You will also need
to have an IP address on the serial interface and on the ascend if you want
to ping the interface.

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bep

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