Common Open Policy Service

The Common Open Policy Service ( COPS ) is the " language of the router ." Router must coordinate if they can match a RSVP request ( temporary reservation of a certain minimum bandwidth ) or not with each other. It is therefore possible that policy information between a policy client ( Policy Enforcement Points, PEPs = Request Direction router) and a policy server ( Policy Decision Point, PDP = of requested router) can be replaced ( The Resource Reservation Protocol (RSVP) must be implemented at the client and server ).

Classification in protocol family

Common Open Policy Service is part of the Internet protocol suite and was published by the IETF ( Internet Engineering Task Force) as a policy protocol under the name Common Open Policy Service as an Internet -Draft and is now available in the form of RFC 2748. It is an application layer protocol that uses port 3288 (TCP).

( MIBs: iso.org.dod.internet.mgmt.mib - 2.copsClientMIB - 1.3.6.1.2.1.89 )

Fig: COPS header classified