chmgrSourceRouteFirstIfPort 1.3.6.1.4.1.2928.6.2.14.1.3.2.1.5

The identity of the port on the board specified in chmgrSourceRouteFirstIfBoard that shall be used for leaving the node. A value of zero (0) means that any port may be used. A DTM interface is identified by a board and a port on that board.