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Misconfigured LMI setting

m-martynowski
Level 1
Level 1

‎01-18-2013 05:52 PM - edited ‎03-04-2019 06:45 PM

I have an easy question, I have a site down that is using AT&T aVPN MPLS on a T1.  The carrier (my beloved AT&T provider....) claims it is a wrong LMI type.  However it is set to Cisco as they specify.  My question is this: If you have the wrong LMI type specified will the interface go up and down or will it just not work?  Currently we periodically see the router online but we cannot get into it and it eventually drops.  Thanks in advance.

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Peter Paluch
Cisco Employee
Cisco Employee

‎01-18-2013 06:56 PM

Hello,

When incorrect LMI type is specified, the interface usually remains "up, line protocol down" without flapping, but that is only my observation. Anyway, hardcoding the LMI type is not necessary. Cisco IOS supports LMI type autodetection. Can you try removing the frame-relay lmi-type cisco command from the serial interface, do shutdown/no shutdown and see if it helps?

If it does not, please check the output of the show interface whether there are any input errors logged. There may be possibly some issue with the circuit or the interface itself.

Best regards,

Peter

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