This attribute specifies the Routing Identifier (RID) associated with
the Passport node.
The RID is used to identify a group of one or more interconnected
Passport nodes (called a subnet) supporting the transport of DPN
traffic. Its value must be the same as that of the other Passport nodes
in this subnet and different from that of all RMs and other Passport
subnets in the network.
The routingId must be set when a DpnAddressPlan component is
configured on an Passport node.
Changing the value of the routingId will cause the node to restart.