Functional overview

The
MPLS VPN-Tagging Server
discovers VRF-based network connections and sends the connection information to
IP Availability Manager
.
IP Availability Manager
uses the connection information to distinguish the overlapping IPs in certain VRF overlapping IP configurations.
The
MPLS VPN-Tagging Server
writes the discovered VRF-related information to a single instance of “IP_External” on
IP Availability Manager
. IP_External is a class that stores the VRF-related information as four tables, one of which is the Network Connection table.
Using the IP tag and network connection information from the Network Connection table,
IP Availability Manager
is able to build the correct network connections for all three overlapping IP configurations in functional-overview.html#GUID-8853805C-1B9A-4815-8AC6-D916AC76D2AA-en__MPLS_DISCO_OVERLAPPING_32083, functional-overview.html#GUID-8853805C-1B9A-4815-8AC6-D916AC76D2AA-en__MPLS_DISCO_OVERLAPPING_68174, and functional-overview.html#GUID-8853805C-1B9A-4815-8AC6-D916AC76D2AA-en__MPLS_DISCO_OVERLAPPING_96293. For configuration 3,
IP Availability Manager
is limited to building only system-level network connections.
The
MPLS VPN-Tagging Server
performs overlapping-IP and corresponding network-connection discovery in two vendor-specific environments:
  • Cisco
  • Alcatel-Lucent
    The
    MPLS VPN-Tagging Server
    can perform discovery in both environments at the same time.