Restrictions on NAT discovery

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There are several restrictions on the management of NAT environments using Network Manager.

Management of NAT environments using Network Manager is restricted by the following conditions:

  • Network Manager can discover one or more NAT environments, but they must all use static NAT address mapping.
  • Network Manager can discover devices in multiple NAT domains, regardless of whether the private IP addresses of the devices are duplicated in other NAT domains. However, the public IP address of each device in each domain must be unique.
  • Devices within a NAT domain that have only private IP addresses cannot be discovered or managed by Network Manager.
  • The discovery process must discover the NAT environment from outside, that is, from the public network.
  • Virtual IP addresses such as Hot Standby Routing Protocol (HSRP) addresses cannot be mapped. The real physical address must be used.
  • The following must be supplied before the discovery is run:
    • The addresses of all supported NAT gateways.
    • The NAT gateway translations must be discovered, either automatically or by supplying the NATTextFileAgent discovery agent with a flat file of public-to-private IP address mappings.