Description: Reason for the bundle going down admin-delete - link has been removed/deleted from the bundle by the administrator, admin-down - physical link has been disabled administratively from module configuration commands, e.g. 'no enable t1 1' drop-config - link has been removed from the bundle due to event being triggered by the error threshold configuration for the link. e.g. 'drop es 10' command setting from the bundle configuration commands. l1-failure - Layer 1 failures (physical links), including physical alarms, excessive errors,etc.