coifccCrossConnectTable - coifcc Cross Connect Table - CISCO-OPTICAL-IF-CROSS-CONNECT-MIB

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coifcc Cross Connect Table

This table contains configuration and state information of point-to-point and point-to-multipoint interface cross-connects. Each entry in the table models two bi-directional interfaces on opposite sides of a bi-directional cross-connect. For a point-to-point cross-connect, there can be up to four entries in the table with the same value of coifccCcIndex, due to the presence of protection interfaces. All four entries are associated with each other due to APS configuration (for now, this would be done through the CISCO-APS-MIB). If both sides A and B are configured for 1+1 APS protection, and a cross-connect between interfaces A and B is created, then the following cross-connect entries will be present: The cross-connect with coifccCcKind value 'provisioned' is the one that is created through cross-connect configuration and the cross-connects with coifccCcKind value 'protection' are those that are created automatically due to APS configuration. Low interface High interface coifccCcKind A B provisioned A B' protection A' B protection A' B' protection When the cross-connect between A and B is deleted, all four cross-connect entries will disappear. Each side of the point-to-point cross-connect can have up to two interfaces, for example when SONET 1+1 Automatic Protection Switching (APS) is used. Any one of the four entries of a point-to-point cross-connect can be created, and the remaining three entries will be created automatically. However only the 'provisioned' entry can be explicitly deleted, which also causes the corresponding 'protection' entries to be deleted. Note that use of the word 'protection' is different from its usage in SONET 1+1 APS. In particular, there is no requirement that the 'provisioned' cross-connect must be between the SONET 'working' interfaces. A point-to-multipoint connection consists of one root and many leaves. Copies of the traffic received at the root interface are transmitted out each of the leaf interfaces. For a point-to-multipoint cross-connect with N leafs, the manager creates N 'provisioned' entries in this table. Where N is determined by the manager based on some application. In the presence of APS configuration, the same point-to-multipoint (N leafs) cross-connect, in addition to having N 'provisioned' entries in this table, can have upto an additional 3N 'protection' entries automatically configured. The terms low and high are chosen to represent numerical ordering of the two interfaces associated with a cross-connect. That is, the interface with the lower value of ifIndex is termed 'low', while the other interface associated with the cross-connect is termed 'high'. This terminology is used to provide directional information; for example, the coifccCcL2HOperStatus applies to the low->high direction, and coifccCcH2LOperStatus applies to the high->low direction.


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