Hi Guys,
I've got an issue with a Cisco 887 where the ADSL link flaps intermittently every day few times randomly. We have already swapped out the Cisco 887 with a new one.
We have also got the carrier to come onsite and check and make some adjustments to the line.
Here are the stats before the line tech came onsite:
Also, before the tech came onsite I observed >600 CRC errors in 20mins using the command (show controllers vDSL 0). After the line tech checked the line I only observed ~500 CRC errors in over 24hrs. Attenuation also improved but the noise margin didn't improve that much.
***Attached is also the "show interfaces" output.
rtr#show controllers vDSL 0
Line Attenuation: 45.0 dB 31.5 dB
Signal Attenuation: 45.0 dB 0.0 dB
Noise Margin: 9.1 dB 11.0 dB
CRC Errors: 0 2248 0 0
Header Errors: 0 4220 0 23
Please check the config and the ADSL stats from the Cisco 887.
The stats below are taken after the work carried out by the line tech.
CONFIGURATION:
!
interface ATM0
description WAN-Ipera-SID-<ID>
bandwidth 384
no ip address
load-interval 30
no atm ilmi-keepalive
pvc 8/35
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
!
!
interface Dialer1
description WAN-###
ip address negotiated
ip nbar protocol-discovery
ip virtual-reassembly in
encapsulation ppp
dialer pool 1
dialer idle-timeout 0
dialer persistent
dialer-group 1
ppp chap hostname #################
ppp chap password 7 #################
!
***********************************************************************#show controllers vdsl 0
rtr#show controllers 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 0x939F
Chip Vendor Country: 0xB500 0xB500
Modem Vendor ID: 'CSCO' ' '
Modem Vendor Specific: 0x4602 0x0000
Modem Vendor Country: 0xB500 0x0000
Serial Number Near: FGL174422AT 887VA-M- 15.1(4)M
Serial Number Far:
Modem Version Near: 15.1(4)M
Modem Version Far: 0x939f
Modem Status: TC Sync (Showtime!)
DSL Config Mode: AUTO
Trained Mode: G.992.1 (ADSL) Annex A
TC Mode: ATM
Selftest Result: 0x00
DELT configuration: disabled
DELT state: not running
Trellis: ON ON
Line Attenuation: 37.0 dB 23.0 dB
Signal Attenuation: 37.0 dB 0.0 dB
Noise Margin: 10.4 dB 11.0 dB
Attainable Rate: 9720 kbits/s 1252 kbits/s
Actual Power: 19.9 dBm 12.3 dBm
Total FECS: 50480 0
Total ES: 15 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: 0 0
Full inits: 112
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 8096 0 1024
Previous Speed: 0 8096 0 1024
Total Cells: 0 101120461 0 0
User Cells: 0 6863 0 0
Reed-Solomon EC: 0 50480 0 0
CRC Errors: 0 59 0 0
Header Errors: 0 275 0 1
Interleave (ms): 0.00 8.00 0.00 4.00
Actual INP: 0.00 1.16 0.00 0.66
Training Log : Stopped
Training Log Filename : flash:vdsllog.bin
***********************************************************************#show controllers vdsl 0 datapath
rtr#show controllers vdsl 0 datapath
Controller VDSL 0 is UP
***********************************************
* Data Path Counters on Host-Modem interface *
***********************************************
Modem Switch Statistics: GMII2 Port CPU Port
Number of octets Tx: 311735391 311224223
Number of octets Rx: 311224223 311735519
Number of unicast packets Tx: 1680453 1695413
Number of unicast packets Rx: 1695195 1680236
Number of broadcast packets Tx: 0 0
Number of broadcast packets Rx: 0 0
Number of multicast packets Tx: 0 0
Number of multicast packets Rx: 0 0
Number of Rx FCS Errors: 0 0
Number of Rx Alignment Errors: 0 0
Number of Tx pause frames: 0 0
Number of Rx pause frames: 0 0
Number of single collision frames: 0 0
Number of multiple collision frames: 0 0
Number of dropped packets Tx: 0 0
Number of dropped packets Rx: 0 0
Number of framein discards Tx: 0 0
Number of excess frame discards Rx: 0 0
************************************************
* Data Path Counters on Modem-DSLAM interface *
************************************************
ptm0 Link encap:Ethernet HWaddr 02:10:18:01:00:02
UP BROADCAST RUNNING MULTICAST MTU:1600 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:2 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
atm/ptm interface statistics for port 0
in octets 2756
out octets 5989
in packets 28
out packets 32
in OAM cells 0
out OAM cells 0
in ASM cells 0
out ASM cells 0
in packet errors 0
in cell errors 0
***********************************************
* Data Path XCONN Stats *
***********************************************
BCM Ethernet Statistics: To XTM To Other
Number of Packets: 1695416 2
BCM XTM Statistics:
PVC RxAAL5FromEth RxRawFromEth TxAAL5ToEth TxRawToEth TxToOthers
8/35 4247 0 4109 0 0
***********************************************
* PTM Path congestion Stats *
***********************************************
Set Count : 0
Clear Count : 0
Tx congested: N
PTM Congestion State: 0
***********************************************************************Portion of the log messages
Sep 8 20:58:27.327: %CONTROLLER-5-UPDOWN: Controller VDSL 0, changed state to down
Sep 8 20:58:31.587: %LINK-3-UPDOWN: Interface ATM0, changed state to down
Sep 8 20:58:32.587: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0, changed state to down
Sep 8 20:58:32.791: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to down
Sep 8 20:58:32.791: %DIALER-6-UNBIND: Interface Vi2 unbound from profile Di1
.Sep 8 20:58:32.795: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access2, changed state to down
.Sep 8 20:58:51.347: %CONTROLLER-5-UPDOWN: Controller VDSL 0, changed state to up
.Sep 8 20:59:01.632: %LINK-3-UPDOWN: Interface ATM0, changed state to up
.Sep 8 20:59:02.632: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0, changed state to up
.Sep 8 20:59:07.616: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to up
.Sep 8 20:59:07.616: %DIALER-6-BIND: Interface Vi2 bound to profile Di1
.Sep 8 20:59:07.704: %AAA-3-BADSERVERTYPEERROR: Cannot process authentication server type radius (UNKNOWN)
.Sep 8 20:59:11.912: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access2, changed state to up
.Sep 8 20:59:20.732: %DTP-5-NONTRUNKPORTON: Port Fa2 has become non-trunk
.Sep 8 20:59:21.228: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet2, changed state to down
.Sep 8 20:59:22.236: %LINK-3-UPDOWN: Interface FastEthernet2, changed state to up
.Sep 8 20:59:22.388: %DTP-5-TRUNKPORTON: Port Fa2 has become dot1q trunk
.Sep 8 20:59:23.236: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet2, changed state to up
.Sep 8 20:59:56.481: %DTP-5-NONTRUNKPORTON: Port Fa2 has become non-trunk
.Sep 8 20:59:56.973: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet2, changed state to down
.Sep 8 20:59:57.981: %LINK-3-UPDOWN: Interface FastEthernet2, changed state to up
.Sep 8 20:59:58.125: %DTP-5-TRUNKPORTON: Port Fa2 has become dot1q trunk
.Sep 8 20:59:58.981: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet2, changed state to up
.Sep 8 21:00:05.937: %DTP-5-NONTRUNKPORTON: Port Fa2 has become non-trunk
Any thoughts on the potential causes for this issue would be appreciated.
Thanks
Arun
