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New Member

Multilink Errors and Reliability

I have 3 Serial interfaces setup in a multilink configuration. The Multilink interface receive a packet error for almost every input packet. The CRC error counts are almost the same count also. I've checked each individual Serial interface and they show NO errors.

In addition, my Multilink interface availability is constantly 128/255. I will post run-configs and interface status. Thanks in advance for any help.

4 REPLIES
Hall of Fame Super Gold

Re: Multilink Errors and Reliability

Which exact IOS are you running ?

New Member

Re: Multilink Errors and Reliability

c3660-is-mz.123-23.bin

Also...I was researching and Cisco's Output Interpreter said that timing could be a problem. Below is the status of the 3 T1 controllers:

Cisco3660-2#show control T1 1/0

T1 1/0 is up.

Applique type is Channelized T1

Cablelength is long gain36 0db

Description: MPLS Circuit 1

No alarms detected.

alarm-trigger is not set

Soaking time: 3, Clearance time: 10

AIS State:Clear LOS State:Clear LOF State:Clear

Framing is ESF, Line Code is B8ZS, Clock Source is Line.

Data in current interval (476 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

Cisco3660-2#show control T1 1/1

T1 1/1 is up.

Applique type is Channelized T1

Cablelength is long gain36 0db

Description: MPLS Circuit 2

No alarms detected.

alarm-trigger is not set

Soaking time: 3, Clearance time: 10

AIS State:Clear LOS State:Clear LOF State:Clear

Framing is ESF, Line Code is B8ZS, Clock Source is Line.

Data in current interval (511 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

Cisco3660-2#show control T1 2/0

T1 2/0 is up.

Applique type is Channelized T1

Cablelength is long gain36 0db

Description: MPLS Circuit 3

No alarms detected.

alarm-trigger is not set

Soaking time: 3, Clearance time: 10

AIS State:Clear LOS State:Clear LOF State:Clear

Framing is ESF, Line Code is B8ZS, Clock Source is Line.

Data in current interval (526 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

Hall of Fame Super Gold

Re: Multilink Errors and Reliability

All seems fine.

Can you try, for example, 12.4(3j) ?

New Member

Re: Multilink Errors and Reliability

Unfortunately no. The router is an old 3660 and would need a memory upgrade first.

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