Planet Technology IP DSLAM IDL-4801 - Manual (Page 483)

IP DSLAM 483
defines separate routes in context of itself. . If
VlanId and RID have been created and
the routing database is configured for IRD, than
routes in RID shall define flow for packets
coming on VLAN Id . The other mode for the
database is SRD( Shared Routing Database)
where there is a single RID in the system and all
flows map to this RID.
This RID has to be explicitly created and no more
than one RID can be created in the system in this
mode. Flows for all created VLANs shall map to
this RID for routing. A value of RID as 0 has a
special meaning. RID value 0 refers to
management RID and all entries created in
context of RID value 0 shall be for routes related
to the management/control. In Stacked Vlan
Mode the Vlan Corresponding to RID is Virtual
Vlan while in Native Vlan mode this is normal
Vlan(C-VLAN).