Continuum controller goes offline, controller error log shows LAN_ERR_BUFFER_TOO_SMALL_ERROR and/or LAN_ERR_ALLOCATION_ERROR.

[Product_Support]

Issue

Controller randomly goes offline and add entries in its error log indicating LAN_ERR_BUFFER_TOO_SMALL_ERROR and/or LAN_ERR_ALLOCATION_ERROR.

Environment

CX9680

ACX5740/20

Cause

Typically this is caused by a problem with the link partner (hub or switch) or some kind of CAT5 issue.

Resolution

1. If you have other ACX controller on this switch that is working fine try swapping the ports (or move the controller to a different port) and see if the problem follows the port or the controller.
2. If the switch is a smart switch that gives an error log, get the log from the switch and analyze it or send in for analysis.
3. There is also a possibility that the NIC card in the controller is bad but that assumption can only be made after everything else has been eliminated.