Use > Monitor with the NNM iSPI for MPLS > Duplicate IP Address Support with the iSPI for MPLS

Duplicate IP Address Support with the NNM iSPI for MPLS

You can monitor the PE-CE link connectivity on the network by using the MPLS inventory.

The NNM iSPI for MPLS discovers the PE-CE connections correctly in a duplicate IP address environment in the following conditions:

  • Protocols used are BGP, OSPF, RIP, EIGRP, or Static routes for PE-CE connection.
  • When the duplicate IP addresses appear for the MPLS-enabled nodes participating in the L3 VPN topology.
  • When the duplicate IP addresses appear at the subnet level.
  • When the duplicate IP address appear for the L2 connections that are CDP-enabled.
  • When the duplicate IP address appear for the PE interface that is a VLAN interface.
  • When the duplicate IP address appear for Ethernet or Point to Point media.

The NNM iSPI for MPLS does not support the following conditions:

  • An IP address used by the CE node that is not manageable (no SNMP response) by NNMi. But, the IP address of these CE nodes match the subnet address, thereby the CE nodes may appear in multiple L3 VPNs.
  • If Ethernet is used for PE-CE communication and for a long duration there is no data transfer then ARP Cache does not contain any data and times out. If the NNM iSPI for MPLS discovery process starts when ARP Cache is down, no information is found for the PE-CE communication. In this case, the NNM iSPI for MPLS does not resolve the duplicate IP address.