For linegroups, this value contains information about line redundancy as follows: 0x8000 bit set => switchover on failure 0x7FFF number of seconds to wait before switchover 0x40000000 bit set => revert after switchover 0x3FFF0000 these 4 bits contains the number of seconds to wait before reverting 0x80000000 bit set => disable transmit on standby For physical interfaces: 0x00000001 bit set => secondary member of a protection pair bit clear => primary member, or standalone