06-18-2012 07:02 AM - edited 03-04-2019 04:42 PM
Hi,
I'm facing an issue since 2 month now , no one is able to tell me what's going on. The line goes down suddently for 2 or 3 minutes and this happens everyday at the same range (~2 or 3 hours) of time . I don't have any scheduled task to cause this. ISP in his side has also made some tshoot but found nothing and is convinced that the problem is coming from our side :
Here is some log :
Cisco IOS Software, C880 Software (C880DATA-UNIVERSALK9-M), Version 15.1(4)M4, RELEASE SOFTWARE (fc1)
rtr-Id#show debugging
Generic IP:
IP packet errors debugging is on
IP NAT ERROR debugging is on
PPP:
PPP authentication debugging is on
PPP protocol errors debugging is on
PPPoE:
PPPoE protocol events debugging is on
PPPoE protocol errors debugging is on
PPPoA:
PPP over ATM events debugging is on
PPP over ATM errors debugging is on
2d00h: Sending PADI: Interface = Ethernet0
Jun 17 09:35:56.722: %CONTROLLER-5-UPDOWN: Controller VDSL 0, changed state to down
Jun 17 09:36:05.102: %LINK-3-UPDOWN: Interface ATM0, changed state to down
2d00h: PPPoE:ATM0.1 8/35, Got ATM VC Event
Jun 17 09:36:06.102: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0, changed state to down
2d00h: padi timer expired
2d00h: Sending PADI: Interface = Ethernet0
2d00h: Vi1 PPP: Missed 5 keepalives, taking LCP down
2d00h: Vi1 PPP DISC: Missed too many keepalives
2d00h: Vi1 PPP: Sending Acct Event[Down] id[24]
2d00h: PPP: NET STOP send to AAA.
2d00h: Vi1 IPCP: Event[DOWN] State[Open to Starting]
2d00h: Vi1 IPCP: Event[CLOSE] State[Starting to Initial]
2d00h: Vi1 LCP: O TERMREQ [Open] id 2 len 4
2d00h: Vi1 LCP: Event[CLOSE] State[Open to Closing]
2d00h: Vi1 PPP: Phase is TERMINATING
2d00h: Vi1 LCP: Event[DOWN] State[Closing to Initial]
2d00h: Vi1 PPP: Phase is DOWN
.............
Some config :
controller VDSL 0
!
bba-group pppoe global
!
interface Ethernet0
no ip address
shutdown
pppoe-client dial-pool-number 1
no fair-queue
!
interface ATM0
no ip address
no atm ilmi-keepalive
!
interface ATM0.1 point-to-point
pvc 8/35
pppoe-client dial-pool-number 1
!
interface Vlan1
description --- Customer LAN ---
ip address 192.168.1.254 255.255.255.0
ip nat inside
ip virtual-reassembly in
ip tcp adjust-mss 1452
!
interface Dialer0
description --- Internode ADSL ---
ip address negotiated
ip nbar protocol-discovery
ip flow ingress
ip nat outside
ip inspect STAEFUL_FW out
ip virtual-reassembly in max-reassemblies 64
ip virtual-reassembly out max-reassemblies 1024
encapsulation ppp
dialer pool 1
dialer idle-timeout 0
dialer persistent
dialer-group 1
ppp authentication pap chap callin
ppp chap hostname EREG**
ppp chap password 7 022416540A020D204*****
Solved! Go to Solution.
06-18-2012 12:08 PM
Seeing the output of the show controller VDSL.
You have a problem with the noise margin, the noise margin is below 10 dB, this is a relation between your max speed and current speed, to have stability in the line, my advice is to have the noise margin superior to 10 dB.
Try to lower your speed with your ISP, so the noise margin get up, and your connection should be fine.
---
Posted by WebUser Pedro Seabra Ávila from Cisco Support Community App
06-18-2012 07:33 AM
Can you send the output of the command show controller vdsl ?
---
Posted by WebUser Pedro Seabra Ávila from Cisco Support Community App
06-18-2012 07:36 AM
Sure :
rtr-Ireland#show controller vdsL 0
Controller VDSL 0 is UP
Daemon Status: Up
XTU-R (DS) XTU-C (US)
Chip Vendor ID: 'BDCM' 'BDCM'
Chip Vendor Specific: 0x0000 0x6291
Chip Vendor Country: 0xB500 0xB500
Modem Vendor ID: 'CSCO' ' '
Modem Vendor Specific: 0x4602 0x0000
Modem Vendor Country: 0xB500 0x0000
Serial Number Near: ***** 887VA-K9 15.1(4)M
Serial Number Far:
Modem Version Near: 15.1(4)M
Modem Version Far: 0x6291
Modem Status: TC Sync (Showtime!)
DSL Config Mode: AUTO
Trained Mode: G.992.5 (ADSL2+) Annex A
TC Mode: ATM
Selftest Result: 0x00
DELT configuration: disabled
DELT state: not running
Trellis: ON ON
Line Attenuation: 26.5 dB 14.5 dB
Signal Attenuation: 26.5 dB 14.3 dB
Noise Margin: 7.0 dB 9.3 dB
Attainable Rate: 15712 kbits/s 1282 kbits/s
Actual Power: 18.5 dBm 12.2 dBm
Total FECS: 4622 0
Total ES: 1 0
Total SES: 0 0
Total LOSS: 0 0
Total UAS: 0 0
Total LPRS: 0 0
Total LOFS: 0 0
Total LOLS: 0 0
Bit swap: 725 3
Full inits: 1
Failed full inits: 0
Short inits: 0
Failed short inits: 0
Firmware Source File Name (version)
-------- ------ -------------------
VDSL embedded VDSL_LINUX_DEV_01212008 (1)
Modem FW Version: 110506_1916-4.02L.03.A2pv6C032b.d23i
Modem PHY Version: A2pv6C032b.d23i
DS Channel1 DS Channel0 US Channel1 US Channel0
Speed (kbps): 0 12283 0 1117
Previous Speed: 0 0 0 0
Total Cells: 0 343570644 0 31234778
User Cells: 0 6751530 0 2048470
Reed-Solomon EC: 0 4622 0 0
CRC Errors: 0 1 0 0
Header Errors: 0 0 0 0
Interleave (ms): 0.00 8.71 0.00 7.26
Actual INP: 0.00 2.55 0.00 1.61
Training Log : Stopped
Training Log Filename : flash:vdsllog.bin
06-18-2012 12:08 PM
Seeing the output of the show controller VDSL.
You have a problem with the noise margin, the noise margin is below 10 dB, this is a relation between your max speed and current speed, to have stability in the line, my advice is to have the noise margin superior to 10 dB.
Try to lower your speed with your ISP, so the noise margin get up, and your connection should be fine.
---
Posted by WebUser Pedro Seabra Ávila from Cisco Support Community App
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