Cisco 881W - ADSL Connection Dropping - Need Help

Unanswered Question
Sep 18th, 2010

All,

My ADSL connection keeps dropping.  The Motorola modem keeps losing sync.  Here is the output from my Cisco 881W that is connected to the modem:

000874: *Sep 18 16:43:08.151 PCTime: %DIALER-6-UNBIND: Interface Vi1 unbound from profile Di0
000875: *Sep 18 16:43:08.155 PCTime: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to down
000876: *Sep 18 16:43:09.151 PCTime: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to down
000877: *Sep 18 16:44:31.079 PCTime: %DIALER-6-BIND: Interface Vi1 bound to profile Di0
000878: *Sep 18 16:44:31.083 PCTime: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to up
000879: *Sep 18 16:44:32.539 PCTime: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to up
000880: *Sep 18 16:48:48.563 PCTime: %DIALER-6-UNBIND: Interface Vi1 unbound from profile Di0
000881: *Sep 18 16:48:48.567 PCTime: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to down
000882: *Sep 18 16:48:49.563 PCTime: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to down
000883: *Sep 18 16:49:35.611 PCTime: %DIALER-6-BIND: Interface Vi1 bound to profile Di0
000884: *Sep 18 16:49:35.615 PCTime: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to up
000885: *Sep 18 16:49:36.859 PCTime: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to up

Here is the output from my Dialer0 interface:

Cisco#sh int dialer0
Dialer0 is up, line protocol is up (spoofing)
  Hardware is Unknown
  Description: $FW_OUTSIDE$
  Internet address is 98.64.250.61/32
  MTU 1500 bytes, BW 56 Kbit/sec, DLY 20000 usec,
     reliability 255/255, txload 4/255, rxload 232/255
  Encapsulation PPP, loopback not set
  Keepalive set (10 sec)
  DTR is pulsed for 1 seconds on reset
  Interface is bound to Vi1
  Last input never, output never, output hang never
  Last clearing of "show interface" counters 1w1d
  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  0/0/16 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 42 kilobits/sec
  5 minute input rate 51000 bits/sec, 0 packets/sec
  5 minute output rate 1000 bits/sec, 1 packets/sec
     2404239 packets input, 2556243782 bytes
     1814952 packets output, 331297211 bytes
Bound to:
Virtual-Access1 is up, line protocol is up
  Hardware is Virtual Access interface
  MTU 1500 bytes, BW 56 Kbit/sec, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 209/255
  Encapsulation PPP, LCP Open
  Open: IPCP
  PPPoE vaccess, cloned from Dialer0
  Vaccess status 0x44, loopback not set
  Keepalive set (10 sec)
  Interface is bound to Di0 (Encapsulation PPP)
  Last input 00:02:24, output never, output hang never
  Last clearing of "show interface" counters 00:08:24
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 46000 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     5667 packets input, 4552721 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
     4745 packets output, 1141276 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
Cisco#

Does this suggest a problem with my telephone line causing the loss of sync or are there any clues in the above to suggest that maybe I have a config problem?  If you want me to provide more log or config data from the Cisco 881W, just let me know and I'll post it to this message.

Thanks for the help!

James

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.
Phillip Remaker Tue, 09/21/2010 - 16:15

Why do you say "The Motorola modem keeps losing sync?"  Are the blinking lights on themodem indicating that?

Since the Cisco is the PPPOE endpoint (client), we are just the victims here.  A loss of DSL connection disrupts the PPPOE "server" at the service provider, and therefore will reset the PPPOE connection when the DSL comes back up which is what you are seeing.

The question is, why is the DSL circuit losing sync?  Are you using miocrofilters on other phone lines on that wire?  Are you using twiisted part cable to the wall?  Is the copper in good shape?

melladoosra Tue, 09/21/2010 - 20:22

I had a similar issue a while ago. Think it was an issue with the ppp authentication

Post the config of your dialer interface.

Actions

This Discussion