Cisco 1841 with PPP Internet link down

Unanswered Question
Oct 1st, 2014
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Hi brothers, please help.

We have Cisco 1841 with ATM card connect to Internet . Some days one Dialer interface of  ISP is down and only restart router to get Dialer interface up again. I check debug PPP negotiation & see that no inbound packets from ISP.

I really need to fix this issue permanently, not need to restart router to recover Internet.

Thanks!

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All line protocol from ATM0/0/0 & Dialer interfaces are up, but Dialer interface cannot get allocated IP addresses.

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interface ATM0/0/0
 description ISP Internet
 no ip address
 no atm ilmi-keepalive
 dsl operating-mode itu-dmt
 pvc 0/38
  encapsulation aal5mux ppp dialer
  dialer pool-member 2

 

interface Dialer2
 description ISP Internet 1
 mtu 1492
 bandwidth 8000
 ip address negotiated
 ip nat outside
 no ip virtual-reassembly in
 encapsulation ppp
 dialer pool 2
 dialer-group 2
 ppp authentication chap callin
 ppp chap hostname xxx
 ppp chap password 7 xxx
 no cdp enable

 

wr1#show ip int br
Interface                  IP-Address      OK? Method Status                Protocol

ATM0/0/0                   unassigned      YES NVRAM  up                    up      
ATM0/1/0                   unassigned      YES NVRAM  up                    up      
Dialer2                    unassigned      YES IPCP   up                    up     

 

wr1#show int atm0/0/0
ATM0/0/0 is up, line protocol is up
  Hardware is HWIC-DSLSAR (with Alcatel ADSL Module), address is 001f.9e87.xxx(bia 001f.9e87.xxx)
  Description: ISP Internet
  MTU 4470 bytes, sub MTU 4470, BW 832 Kbit/sec, DLY 610 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ATM, loopback not set
  Keepalive not supported
  Encapsulation(s): AAL5
  23 maximum active VCs, 256 VCs per VP, 1 current VCCs
  VC Auto Creation Disabled.
  VC idle disconnect time: 300 seconds
  Last input never, output 23:48:07, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1084
  Queueing strategy: Per VC Queueing
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     58124 packets input, 30790858 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 348 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     51848 packets output, 16773091 bytes, 0 underruns
     6 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
wr1#show int dia2
Dialer2 is up, line protocol is up (spoofing)
  Hardware is Unknown
  Description: ISP Internet
  Internet address will be negotiated using IPCP
  MTU 1492 bytes, BW 8000 Kbit/sec, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, LCP Closed, loopback not set
  Keepalive set (10 sec)
  DTR is pulsed for 1 seconds on reset
  Interface is bound to Vi2
  Last input never, output never, output hang never
  Last clearing of "show interface" counters 1d00h
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: Class-based queueing
  Output queue: 0/1000/0 (size/max total/drops)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     52937 packets input, 30470954 bytes
     52931 packets output, 17287959 bytes
Bound to:
Virtual-Access2 is up, line protocol is down
  Hardware is Virtual Access interface
  MTU 1492 bytes, BW 8000 Kbit/sec, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, LCP REQsent
  PPPoATM vaccess, cloned from Dialer2
  Vaccess status 0x44
  Bound to ATM0/0/0 VCD: 1, VPI: 0, VCI: 38, loopback not set
  Keepalive set (10 sec)
  DTR is pulsed for 5 seconds on reset
  Interface is bound to Di2 (Encapsulation PPP)
  Last input 00:00:09, output never, output hang never
  Last clearing of "show interface" counters 1d00h
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 40403
  Queueing strategy: Class-based queueing
  Output queue: 65/1000/0 (size/max total/drops)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     58124 packets input, 30591958 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     93405 packets output, 17935575 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

 

syslog for debug  ppp negotiation:

 

2014-09-10 08:49:31    Local7.Notice    local IP address    801: wr1.lon: .Sep 10 01:51:33.803: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to down
2014-09-10 08:49:32    Local7.Notice    local IP address    804: wr1.lon: .Sep 10 01:51:35.247: %TRACKING-5-STATE: 3 ip sla 3 state Up->Down
...
2014-09-10 09:13:40    Local7.Error    local IP address    808: wr1.lon: Sep 10 02:15:42.646: %LINK-3-UPDOWN: Interface ATM0/0/0, changed state to up
2014-09-10 09:13:40    Local7.Notice    local IP address    809: wr1.lon: Sep 10 02:15:43.646: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to up
2014-09-10 09:13:45    Local7.Error    local IP address    810: wr1.lon: Sep 10 02:15:48.957: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to up
2014-09-10 09:13:45    Local7.Debug    local IP address    811: wr1.lon: Sep 10 02:15:48.961: Interface Virtual-Access2 max_reserved_bandwidth config will not
2014-09-10 09:13:45    Local7.Debug    local IP address    812: wr1.lon: take effect on the queueing features configured via service-policy
2014-09-10 09:13:45    Local7.Info    local IP address    813: wr1.lon: Sep 10 02:15:48.965: %DIALER-6-BIND: Interface Vi2 bound to profile Di2
2014-09-10 09:13:45    Local7.Debug    local IP address    814: wr1.lon: Sep 10 02:15:48.965: Vi2 PPP: Sending cstate UP notification
2014-09-10 09:13:45    Local7.Debug    local IP address    815: wr1.lon: Sep 10 02:15:48.969: Vi2 PPP: Processing CstateUp message
2014-09-10 09:13:45    Local7.Debug    local IP address    816: wr1.lon: Sep 10 02:15:48.973: PPP: Alloc Context [662C56A4]
2014-09-10 09:13:45    Local7.Debug    local IP address    817: wr1.lon: Sep 10 02:15:48.973: ppp3 PPP: Phase is ESTABLISHING
2014-09-10 09:13:45    Local7.Debug    local IP address    818: wr1.lon: Sep 10 02:15:48.973: Vi2 PPP: Using dialer call direction
2014-09-10 09:13:45    Local7.Debug    local IP address    819: wr1.lon: Sep 10 02:15:48.973: Vi2 PPP: Treating connection as a callout
2014-09-10 09:13:45    Local7.Debug    local IP address    820: wr1.lon: Sep 10 02:15:48.973: Vi2 PPP: Session handle[14000004] Session id[3]
2014-09-10 09:13:45    Local7.Debug    local IP address    821: wr1.lon: Sep 10 02:15:48.973: Vi2 LCP: Event[OPEN] State[Initial to Starting]
2014-09-10 09:13:45    Local7.Debug    local IP address    822: wr1.lon: Sep 10 02:15:48.973: Vi2 PPP: No remote authentication for call-out
2014-09-10 09:13:45    Local7.Debug    local IP address    823: wr1.lon: Sep 10 02:15:48.973: Vi2 LCP: O CONFREQ [Starting] id 1 len 14
2014-09-10 09:13:45    Local7.Debug    local IP address    824: wr1.lon: Sep 10 02:15:48.973: Vi2 LCP:    MRU 1492 (0x010405D4)
2014-09-10 09:13:46    Local7.Debug    local IP address    825: wr1.lon: Sep 10 02:15:48.973: Vi2 LCP:    MagicNumber 0x24FF1F46 (0x050624FF1F46)
2014-09-10 09:13:46    Local7.Debug    local IP address    826: wr1.lon: Sep 10 02:15:48.973: Vi2 LCP: Event[UP] State[Starting to REQsent]
2014-09-10 09:13:48    Local7.Debug    local IP address    827: wr1.lon: Sep 10 02:15:50.965: Vi2 LCP: O CONFREQ [REQsent] id 2 len 14
2014-09-10 09:13:48    Local7.Debug    local IP address    828: wr1.lon: Sep 10 02:15:50.965: Vi2 LCP:    MRU 1492 (0x010405D4)
2014-09-10 09:13:48    Local7.Debug    local IP address    829: wr1.lon: Sep 10 02:15:50.965: Vi2 LCP:    MagicNumber 0x24FF1F46 (0x050624FF1F46)
2014-09-10 09:13:48    Local7.Debug    local IP address    830: wr1.lon: Sep 10 02:15:50.965: Vi2 LCP: Event[Timeout+] State[REQsent to REQsent]
2014-09-10 09:13:50    Local7.Debug    local IP address    831: wr1.lon: Sep 10 02:15:52.981: Vi2 LCP: O CONFREQ [REQsent] id 3 len 14
2014-09-10 09:13:50    Local7.Debug    local IP address    832: wr1.lon: Sep 10 02:15:52.981: Vi2 LCP:    MRU 1492 (0x010405D4)
2014-09-10 09:13:50    Local7.Debug    local IP address    833: wr1.lon: Sep 10 02:15:52.981: Vi2 LCP:    MagicNumber 0x24FF1F46 (0x050624FF1F46)
2014-09-10 09:13:50    Local7.Debug    local IP address    834: wr1.lon: Sep 10 02:15:52.981: Vi2 LCP: Event[Timeout+] State[REQsent to REQsent]
2014-09-10 09:13:52    Local7.Debug    local IP address    835: wr1.lon: Sep 10 02:15:54.996: Vi2 LCP: O CONFREQ [REQsent] id 4 len 14
2014-09-10 09:13:52    Local7.Debug    local IP address    836: wr1.lon: Sep 10 02:15:54.996: Vi2 LCP:    MRU 1492 (0x010405D4)
2014-09-10 09:13:52    Local7.Debug    local IP address    837: wr1.lon: Sep 10 02:15:54.996: Vi2 LCP:    MagicNumber 0x24FF1F46 (0x050624FF1F46)
2014-09-10 09:13:52    Local7.Debug    local IP address    838: wr1.lon: Sep 10 02:15:55.000: Vi2 LCP: Event[Timeout+] State[REQsent to REQsent]
2014-09-10 09:13:54    Local7.Debug    local IP address    839: wr1.lon: Sep 10 02:15:57.012: Vi2 LCP: O CONFREQ [REQsent] id 5 len 14
2014-09-10 09:13:54    Local7.Debug    local IP address    840: wr1.lon: Sep 10 02:15:57.012: Vi2 LCP:    MRU 1492 (0x010405D4)
2014-09-10 09:13:54    Local7.Debug    local IP address    841: wr1.lon: Sep 10 02:15:57.012: Vi2 LCP:    MagicNumber 0x24FF1F46 (0x050624FF1F46)
2014-09-10 09:13:54    Local7.Debug    local IP address    842: wr1.lon: Sep 10 02:15:57.012: Vi2 LCP: Event[Timeout+] State[REQsent to REQsent]
2014-09-10 09:13:56    Local7.Debug    local IP address    843: wr1.lon: Sep 10 02:15:59.028: Vi2 LCP: O CONFREQ [REQsent] id 6 len 14
2014-09-10 09:13:56    Local7.Debug    local IP address    844: wr1.lon: Sep 10 02:15:59.028: Vi2 LCP:    MRU 1492 (0x010405D4)
2014-09-10 09:13:56    Local7.Debug    local IP address    845: wr1.lon: Sep 10 02:15:59.028: Vi2 LCP:    MagicNumber 0x24FF1F46 (0x050624FF1F46)
2014-09-10 09:13:56    Local7.Debug    local IP address    846: wr1.lon: Sep 10 02:15:59.028: Vi2 LCP: Event[Timeout+] State[REQsent to REQsent]
2014-09-10 09:13:58    Local7.Debug    local IP address    847: wr1.lon: Sep 10 02:16:01.044: Vi2 LCP: O CONFREQ [REQsent] id 7 len 14
2014-09-10 09:13:58    Local7.Debug    local IP address    848: wr1.lon: Sep 10 02:16:01.044: Vi2 LCP:    MRU 1492 (0x010405D4)
2014-09-10 09:13:58    Local7.Debug    local IP address    849: wr1.lon: Sep 10 02:16:01.044: Vi2 LCP:    MagicNumber 0x24FF1F46 (0x050624FF1F46)
2014-09-10 09:13:58    Local7.Debug    local IP address    850: wr1.lon: Sep 10 02:16:01.044: Vi2 LCP: Event[Timeout+] State[REQsent to REQsent]
2014-09-10 09:14:00    Local7.Debug    local IP address    851: wr1.lon: Sep 10 02:16:03.060: Vi2 LCP: O CONFREQ [REQsent] id 8 len 14
2014-09-10 09:14:00    Local7.Debug    local IP address    852: wr1.lon: Sep 10 02:16:03.060: Vi2 LCP:    MRU 1492 (0x010405D4)
2014-09-10 09:14:00    Local7.Debug    local IP address    853: wr1.lon: Sep 10 02:16:03.060: Vi2 LCP:    MagicNumber 0x24FF1F46 (0x050624FF1F46)
2014-09-10 09:14:00    Local7.Debug    local IP address    854: wr1.lon: Sep 10 02:16:03.060: Vi2 LCP: Event[Timeout+] State[REQsent to REQsent]
2014-09-10 09:14:02    Local7.Debug    local IP address    855: wr1.lon: Sep 10 02:16:05.075: Vi2 LCP: O CONFREQ [REQsent] id 9 len 14
2014-09-10 09:14:02    Local7.Debug    local IP address    856: wr1.lon: Sep 10 02:16:05.075: Vi2 LCP:    MRU 1492 (0x010405D4)
2014-09-10 09:14:02    Local7.Debug    local IP address    857: wr1.lon: Sep 10 02:16:05.075: Vi2 LCP:    MagicNumber 0x24FF1F46 (0x050624FF1F46)
2014-09-10 09:14:02    Local7.Debug    local IP address    858: wr1.lon: Sep 10 02:16:05.075: Vi2 LCP: Event[Timeout+] State[REQsent to REQsent]
2014-09-10 09:14:04    Local7.Debug    local IP address    859: wr1.lon: Sep 10 02:16:07.091: Vi2 LCP: O CONFREQ [REQsent] id 10 len 14
2014-09-10 09:14:04    Local7.Debug    local IP address    860: wr1.lon: Sep 10 02:16:07.091: Vi2 LCP:    MRU 1492 (0x010405D4)
2014-09-10 09:14:04    Local7.Debug    local IP address    861: wr1.lon: Sep 10 02:16:07.091: Vi2 LCP:    MagicNumber 0x24FF1F46 (0x050624FF1F46)
2014-09-10 09:14:04    Local7.Debug    local IP address    862: wr1.lon: Sep 10 02:16:07.091: Vi2 LCP: Event[Timeout+] State[REQsent to REQsent]
2014-09-10 09:14:06    Local7.Debug    local IP address    863: wr1.lon: Sep 10 02:16:09.107: Vi2 PPP DISC: LCP failed to negotiate
2014-09-10 09:14:06    Local7.Debug    local IP address    864: wr1.lon: Sep 10 02:16:09.107: PPP: NET STOP send to AAA.
2014-09-10 09:14:06    Local7.Debug    local IP address    865: wr1.lon: Sep 10 02:16:09.107: Vi2 PPP: No remote authentication for call-out
2014-09-10 09:14:06    Local7.Debug    local IP address    866: wr1.lon: Sep 10 02:16:09.107: Vi2 LCP: Event[Timeout-] State[REQsent to Stopped]
2014-09-10 09:14:06    Local7.Debug    local IP address    867: wr1.lon: Sep 10 02:16:09.107: Vi2 LCP: Event[DOWN] State[Stopped to Starting]
2014-09-10 09:14:06    Local7.Debug    local IP address    868: wr1.lon: Sep 10 02:16:09.107: Vi2 PPP: Phase is DOWN

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Sunil Bhadauria Wed, 10/01/2014 - 13:17
User Badges:
  • Cisco Employee,

Hello ,

 

As line comes up after reloading the device this does not looks like configuration issue but hardware .

Either connection between ATM card and modem is getting idle or some issue with ATM card .

 

Did you try replacing ATM card with a spare one to see if issue persists .

 

HTH

Sunil Bhadauria

! Kindly rate all helpful posts and accordingly mark correct answers to help forum !

khanhnguyenquoc Wed, 10/01/2014 - 20:13
User Badges:

Hi Sunil Bhadauria

Thank for your recommendation. what a pity that we do not have a spare one, and this device is in remote office.

Should I check any firmware update for ATM card, Router is up-to-date newest version of IOS

 

Thanks!

 

Regards!

----------------------------

Nguyen Quoc Khanh

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