hpnicfEponFBSlavePort 1.3.6.1.4.1.11.2.14.11.15.2.42.6.1.1.1.4

OLT port ifindex of the fiber-backup group. Use it to set or get the group slave port. hpnicfEponFBSlavePort must be set after hpnicfEponFBMasterPort.