Multilink errors

[riot6]

Has anyone seen this before? Can't get direct answer from Cisco.

2 serial interface are running error free (even tested to csu to verify). But seeing increasing input errors on the multilink interface. Thanks.

Posted this in the past but wasn't able to resolve.


MTR>sho int s0/1/0:2 | in cou|CRC|carr|Des|Int
CRC checking enabled
Last clearing of "show interface" counters 11:24:56
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 carrier transitions
MTR>sho int s0/1/1:3 | in cou|CRC|carr|Des|Int
CRC checking enabled
Last clearing of "show interface" counters 11:25:05
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 carrier transitions
MTR>sho int multilink 1 | inc cou|CRC|carr|Des|Int
Description: MTS
Last clearing of "show interface" counters 11:25:21
249 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 carrier transitions

 

[burtsbees]

Can you post a sh run int multilink 1 from both sides?

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[DallasBPF]

also, do a show controller t1 0/1/0 and show controller t1 0/1/1 and see if it shows the T1 up...

another good one to do is show ppp multi to see if they are showing up in the bundle.

what IOS are you running on the box?

------------------------------------
Dallas, Texas
Telecommunications Tech
CCVP, CCNA, Net+

CCNP in the works

 

[riot6]

Multilink1
Bundle name: xxx.xxx.xxx.xxx
Remote Endpoint Discriminator: [2] xxx.xxx.xxx.xxx
Local Endpoint Discriminator: [1] Office
Bundle up for 1w5d, total bandwidth 4608, load 2/255
Receive buffer limit 36096 bytes, frag timeout 1000 ms
Interleaving enabled
0/0 fragments/bytes in reassembly list
2336 lost fragments, 825757 reordered
4356/2097359 discarded fragments/bytes, 4356 lost received
0xCE336F received sequence, 0xA681ED sent sequence
Member links: 3 active, 0 inactive (max not set, min 1)
Se0/2/0:1, since 3d20h, 5760 weight, 1500 frag size
Se0/2/1:1, since 3d20h, 5760 weight, 1500 frag size
Se0/3/0:1, since 3d20h, 5760 weight, 1500 frag size
No inactive multilink interfaces
-
Office>sho int multilink 1 | in coun|CRC|carr|Int|Des
Description: 3XT1
Internet address is xxx.xxx.xxx.xxx/30
Last clearing of "show interface" counters 1d02h
6692 input errors, 0 CRC, 4356 frame, 54 overrun, 0 ignored, 0 abort
0 carrier transitions
-
Office>sho int s0/2/0:1 | in coun|CRC|carr|Int|Des
Description: WAN Link to
Last clearing of "show interface" counters 1d02h
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 carrier transitions
-
Office>sho int s0/2/1:1 | in coun|CRC|carr|Int|Des
Description: WAN Link to
Last clearing of "show interface" counters 1d02h
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 carrier transitions
-
Office>sho int s0/3/0:1 | in coun|CRC|carr|Int|Des
Description: WAN Link to
Last clearing of "show interface" counters 1d02h
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 carrier transitions
-
Office>sho controllers t1 0/2/0 brief
T1 0/2/0 is up.
Applique type is Channelized T1
Cablelength is long gain36 0db
Description: WAN Link
No alarms detected.
alarm-trigger is not set
Soaking time: 3, Clearance time: 10
AIS State:Clear LOS State:Clear LOF State:Clear
Version info Firmware: 20071011, FPGA: 13, spm_count = 0
Framing is ESF, Line Code is B8ZS, Clock Source is Line.
CRC Threshold is 320. Reported from firmware is 320.
Data in current interval (857 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
0 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
-
Office>sho controllers t1 0/2/1 brief
T1 0/2/1 is up.
Applique type is Channelized T1
Cablelength is long gain36 0db
Description: WAN Link
No alarms detected.
alarm-trigger is not set
Soaking time: 3, Clearance time: 10
AIS State:Clear LOS State:Clear LOF State:Clear
Version info Firmware: 20071011, FPGA: 13, spm_count = 0
Framing is ESF, Line Code is B8ZS, Clock Source is Line.
CRC Threshold is 320. Reported from firmware is 320.
Data in current interval (868 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
0 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
-
Office>sho controllers t1 0/3/0 brief
T1 0/3/0 is up.
Applique type is Channelized T1
Cablelength is long gain36 0db
Description: WAN Link
No alarms detected.
alarm-trigger is not set
Soaking time: 3, Clearance time: 10
AIS State:Clear LOS State:Clear LOF State:Clear
Version info Firmware: 20071011, FPGA: 13, spm_count = 0
Framing is ESF, Line Code is B8ZS, Clock Source is Line.
CRC Threshold is 320. Reported from firmware is 320.
Data in current interval (883 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
0 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
-

IOS - Version 12.4(15)
-
Here’s the requested info. Thanks for any help you can provide.
One note, these bundled T1’s go to Juniper routers then to MPLS cloud. Not sure if that will make a difference.

 

[DallasBPF]

Change your IOS... that is actually the EXACT IOS we were using and it has the bug. I upgraded to 12.4.22T2.



------------------------------------
Dallas, Texas
Telecommunications Tech
CCVP, CCNA, Net+

CCNP in the works

 

[riot6]

Thanks DallasBPF. I will give that a shot. Might take awhile to get customer 'go-ahead' but I will post results when completed. Thanks again.

 

[riot6]

Cisco IOS Software, 3800 Software (C3845-ADVENTERPRISEK9-M), Version 12.4(22)T2

ultilink1 is up, line protocol is up
Hardware is multilink group interface
Description:
Internet address is xxx.xxx.xxx.xxx
Encapsulation PPP, LCP Open, multilink Open
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters 09:12:36
Queueing strategy: Class-based queueing
5 minute input rate 142000 bits/sec, 53 packets/sec
5 minute output rate 74000 bits/sec, 50 packets/sec
2112240 packets input, 831639671 bytes, 0 no buffer
2887 input errors, 0 CRC, 1962 frame, 590 overrun, 0 ignored, 0 abort
0 output errors, 0 collisions, 2 interface resets
==========
Upgraded IOS, still seeing the errors on the Multilink while the serial interfaces are running clean.

 

[DallasBPF]

Interesting, that IOS upgrade fixed our errors. Curious though, why is your MPLS link hitting a juniper router before going to the T1 shelf?

------------------------------------
Dallas, Texas
Telecommunications Tech
CCVP, CCNA, Net+

CCNP in the works

 

[burtsbees]

This sounds like it could be an MTU issue with all the overruns and frame errors. I would wireshark from here maybe...

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[pce17]

Did you get the problem fixed?