Monitoring apparatus and monitoring method

A monitoring method of a transport network for a monitoring apparatus configured to monitor the transport network connected with a plurality of communication service providing apparatuses configured to provide a plurality of communication services,

• wherein the transport network includes a plurality of transport apparatuses mutually connected with one another via a plurality of lines,
• wherein the plurality of transport apparatuses multiplex data transmitted by the plurality of communication service providing apparatuses, and transfer the multiplexed data via the plurality of lines within the transport network so that the plurality of communication services provided by the plurality of communication service providing apparatuses are accommodated in the plurality of lines,
• the monitoring method comprising:
• determining, by the monitoring apparatus, whether there is a line at which a failure occurs among the plurality of lines, and
• in a case of determining that there is the line at which the failure occurs among the plurality of lines, calculating, by the monitoring apparatus, a recovery priority indicating a degree of influence of the failure on the plurality of communication services.