[c-nsp] Troubleshooting OC3

[Scott Weeks]

On the surface it looks like a physical layer problem:

   20966 input errors, 20966 CRC

But the counters haven't been cleared for over 4 days:

   Last clearing of "show interface" counters 4d06h

What're your SONET counters showing?

scott



----- Original Message Follows -----
From: "Paul Stewart" <pstewart at nexicomgroup.net>
To: <cisco-nsp at puck.nether.net>
Subject: [c-nsp] Troubleshooting OC3
Date: Mon, 16 Jan 2006 16:09:15 -0500

> We have a pair of OC3's coming into a 7206VXR currently
> from an AFC DSLAM shelf.... Getting fair amount of errors
> and just wondering how to troubleshoot it.... If anyone
> has any input please feel free..;)
> 
> Config:
> 
> interface ATM1/0
>  description Millbrook ATM Interface
>  no ip address
>  no atm ilmi-keepalive
>  no clns route-cache
> !
> interface ATM1/0.1 multipoint
>  description AFC Traffic
>  range pvc 0/32 0/600
>   protocol pppoe
>  !
>  range pvc 6/32 6/215
>   protocol pppoe
>  !
>  range pvc 7/32 7/111
>   protocol pppoe
>  !
>  range pvc 8/32 8/121
>   protocol pppoe
> 
> Etc. etc....
> 
> interface ATM2/0
>  description Keene ATM Inteface
>  no ip address
>  no atm ilmi-keepalive
>  no clns route-cache
> !
> interface ATM2/0.1 multipoint
>  description Keene AFC Traffic
>  range pvc 1/32 1/351
>   protocol pppoe
>  !
>  range pvc 2/32 2/257
>   protocol pppoe
>  !
>  range pvc 3/32 3/151
>   protocol pppoe
> 
> Etc. etc...
> 
> 
> Interface Output:
> 
> acs1-con-mb#sh interfaces ATM2/0
> ATM2/0 is up, line protocol is up
>   Hardware is ENHANCED ATM PA
>   Description: Keene ATM Inteface
>   MTU 4470 bytes, sub MTU 4470, BW 149760 Kbit, DLY 80
> usec,
>      reliability 255/255, txload 9/255, rxload 8/255
>   Encapsulation ATM, loopback not set
>   Encapsulation(s): AAL5
>   4095 maximum active VCs, 1027 current VCCs
>   VC Auto Creation Disabled.
>   VC idle disconnect time: 300 seconds
>   0 carrier transitions
>   Last input 00:00:00, output 00:00:00, output hang never
>   Last clearing of "show interface" counters 4d06h
>   Input queue: 0/75/0/0 (size/max/drops/flushes); Total
> output drops: 0
>   Queueing strategy: Per VC Queueing
>   5 minute input rate 5014000 bits/sec, 1405 packets/sec
>   5 minute output rate 5545000 bits/sec, 1374 packets/sec
>      430617336 packets input, 2272177816 bytes, 1 no
> buffer
>      Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
>      20966 input errors, 20966 CRC, 0 frame, 0 overrun, 0
> ignored, 0 abort
>      426183267 packets output, 2319067260 bytes, 0
> underruns
>      0 output errors, 0 collisions, 0 interface resets
>      0 output buffer failures, 0 output buffers swapped
> out acs1-con-mb#sh interfaces ATM1/0
> ATM1/0 is up, line protocol is up
>   Hardware is ENHANCED ATM PA
>   Description: Millbrook ATM Interface
>   MTU 4470 bytes, sub MTU 4470, BW 149760 Kbit, DLY 80
> usec,
>      reliability 255/255, txload 24/255, rxload 22/255
>   Encapsulation ATM, loopback not set
>   Encapsulation(s): AAL5
>   4095 maximum active VCs, 1376 current VCCs
>   VC Auto Creation Disabled.
>   VC idle disconnect time: 300 seconds
>   0 carrier transitions
>   Last input 00:00:00, output 00:00:00, output hang never
>   Last clearing of "show interface" counters 4d06h
>   Input queue: 0/75/0/0 (size/max/drops/flushes); Total
> output drops: 0
>   Queueing strategy: Per VC Queueing
>   5 minute input rate 13390000 bits/sec, 3911 packets/sec
>   5 minute output rate 14511000 bits/sec, 3755 packets/sec
>      1149228019 packets input, 2933277581 bytes, 0 no
> buffer
>      Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
>      41092 input errors, 41092 CRC, 0 frame, 0 overrun, 0
> ignored, 0 abort
>      1109671884 packets output, 2453813507 bytes, 0
> underruns
>      0 output errors, 0 collisions, 0 interface resets
>      0 output buffer failures, 0 output buffers swapped
> out
> 
>  
> Paul Stewart
> IP Routing/Switching
> Nexicom Inc.
> http://www.nexicom.net
> 
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