Patent attributes
Techniques for detecting misconfiguration of an uplink or an external network device connected with the uplink is disclosed. In an aspect, a Frame Link Module (FLM) in a frame belonging to a group of frames connected in a ring network, may determine that an uplink of the FLM is configured in a management mode. The FLM may determine, based on a system description associated with a Link Layer Discovery Protocol (LLDP) packet, whether the uplink is connected to a network device in an external network. Based on Virtual Local Area Network (VLAN) traffic being dropped, it may be determined that VLAN configuration of one of the uplink and the network device is incompatible for operation in the management mode. The uplink with incompatible VLAN configuration or the uplink connected with a network switch having incompatible VLAN configuration may be removed from a group of uplinks available for selection as an active uplink for the frames.
