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

[Mehmet Ali Suzen]

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)

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.

Thanks for any answer in advanced.

Best,
-Mehmet


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> Mehmet Ali Suzen wrote:
>
> | Dear List,
> | We are trying to establish a connection between Cisco 2509 over a
> | serial line and HDSL modems to Ascend Max 6000, but frustrated
> | to get "line protocol is down" status.
> |
> | Set up is :
> |
> |   Cisco2509--serial 0
> |     <----over DTE Cable--V35>
> |   Alcatel HDSL
> |      <----telco over line L1 L2 ---->
> |   Alcatel HDSL
> |     <---G703---RJ48--->
> |   E1 port Ascend Max 6000
> |
> |
> | But we can not ping to serial 0 even modem lights indicates
> | connection is OK? Shall We assigned an IP address to
> | serial 0 and WAN interface of Ascend Max 6000 as we did?
> | What could be the reason to get "line protocol is down"?
> |
> | Many thanks for any comments or suggestions
> |
> | Best,
> | -Mehmet
> |
> | PS:
> | Encapsulation has set to be PPP, here is the running conf for
> | serial 0:
> | !
> | interface Serial0
> |  ip address 192.168.1.60 255.255.255.224
> |  encapsulation ppp
> |  ppp authentication chap
> |  ppp chap password 7 1248574446
> | !
> |
> | Here is the status of interface
> | # sh int ser 0
> | mahir-r2#sh interfaces serial 0
> | Serial0 is up, line protocol is down
> |   Hardware is HD64570
> |   MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
> |      reliability 255/255, txload 1/255, rxload 1/255
> |   Encapsulation PPP, loopback not set
> |   Keepalive set (10 sec)
> |   LCP Listen
> |   Closed: CDPCP
> ^^^^^^^^^^^^^^^^^^^^^^^^
>
> You have not successfully negotiated the PPP connection.  LCP is still in
> listening state so no other CPs will be negotiated until LCP is
> successful.
>
> I suggest that you check out
> http://www.cisco.com/en/US/tech/tk713/tk507/technologies_tech_note09186a008019cfa7.shtml
> for tips on troubleshooting and look at the output of these commands:
>
> 	debug ppp authentication?To see if a client is passing
> 				authentication.
> If you are using a version prior to Cisco IOS 			software Release 11.2,
> use
> the debug ppp chap command instead.
>
> 	debug ppp negotiation?To see if a client is passing Point-to-Point
> Protocol (PPP) negotiation; this is when you check for address
> 			negotiation.
>
> 	debug ppp error?To display protocol errors and error statistics
> associated with PPP connection negotiation and operation.
>
> My guess is an authentication problem.  You may need the "callin" option
> for "ppp authentication chap" so that the cisco is not challenging the
> Ascend for outgoing calls, only incoming ones.
>
> |   Last input never, output 00:00:08, output hang never
> |   Last clearing of "show interface" counters 00:09:36
> |   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
> |   Queueing strategy: weighted fair
> |   Output queue: 0/1000/64/0 (size/max total/threshold/drops)
> |      Conversations  0/1/256 (active/max active/max total)
> |      Reserved Conversations 0/0 (allocated/max allocated)
> |   5 minute input rate 0 bits/sec, 0 packets/sec
> |   5 minute output rate 0 bits/sec, 0 packets/sec
> |      0 packets input, 0 bytes, 0 no buffer
> |      Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
> |      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
> |      119 packets output, 2261 bytes, 0 underruns
> |      0 output errors, 0 collisions, 31 interface resets
> |      0 output buffer failures, 0 output buffers swapped out
> |      0 carrier transitions
> |      DCD=up  DSR=up  DTR=up  RTS=up  CTS=up
> |
>
>
>
> - --
> =========
> bep
>
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