Automatic topology discovery for optical cross connect

A method comprising:

• storing a data structure indicating a state of a connection between a first optical port of a first optical switch of an optical cross connect and a second optical port of a second optical switch of the optical cross connect different from the first optical switch;
• determining that a source optical signal communicated to the first optical port is received at the second optical port over the connection;
• and
• updating the data structure such that the state indicates that the connection is valid.

A non-transitory computer readable medium storing instructions that, when executed by a combination of one or more processors, cause the combination of one or more processors to:

• store a data structure indicating a state of a connection between a first optical port of a first optical switch of an optical cross connect and a second optical port of a second optical switch of the optical cross connect different from the first optical switch;
• determine that a source optical signal communicated to the first optical port is received at the second optical port over the connection;
• and
• update the data structure such that the state indicates that the connection is valid.