This field is used to specify the VPN name for which
the Auto SAA L3 MPLS VPN RTT operation will be used.
This value must be set in the same PDU of
rttMplsVpnMonCtrlStatus.
The Auto SAA L3 MPLS VPN will find the PEs participating in
this VPN and configure RTT operation corresponding to value
specified in rttMplsVpnMonCtrlRttType.
If the VPN corresponds to the value configured for this object
doesn't exist 'inconsistentValue' error will be returned.
The value 'saa-vrf-all' has a special meaning. When this
object is set to 'saa-vrf-all', all the VPNs in the PE will be
discovered and Auto SAA L3 MPLS VPN will configure RTT
operations corresponding to all these PEs with the value
specified in rttMplsVpnMonCtrlRttType as type for those
operations.
So, the user should avoid using this string for a particular
VPN name when using this feature in order to avoid ambiguity.