Value of next hop filter. Do not match the source routing information to this entry if none of the next hop values in the source routing information, with the next hop filter prefix length applied, matches the next hop filter value with the next hop filter prefix length applied. The next hop filter prefix length is given by the rtmRedistHopFltLen object. Applying the prefix length to an address means taking the first rtmRedistHopFltLen bits of the address. To avoid having any next hop filtering, set the next hop filter to all zeroes and the next hop filter prefix length to zero. The length of this next hop filter must be the address length for the family given by rtmEntityAddressFamily.