The value of tmnxIPsecSASpi specifies the
SPI (Security Parameter Index) used to lookup the instruction to
verify and decrypt the incoming IPsec packets when the value of
tmnxIPsecSADirection is 'inbound'.
The value of tmnxIPsecSASpi specifies the SPI that will be used
in the encoding of the outgoing packets when the value of
tmnxIPsecSADirection is 'outbound'. The remote node can use this
SPI to lookup the instruction to verify and decrypt the packet.
There is no default value for tmnxIPsecSASpi and this is a
required object when creating an entry in tmnxIPsecSATable.
If tmnxIPsecSAAuthenticationKey is not specified when creating an
entry, the request will fail with an 'inconsistentValue' error.