The value of sapTransitPrefixPolicyId specifies the transit prefix
policy to be associated with this SAP. The value must either
be '0' indicating an invalid transit prefix policy or the specified
transit prefix policy needs to exist in the
TIMETRA-BSX-NG-MIB::tmnxBsxTransPrefPolicyTable.
At most one of sapTransitIpPolicyId and sapTransitPrefixPolicyId can
be non-zero.