Abstract: A system and method for managing overlapping address domains are described herein. The method includes receiving, at a global network node management system, communications from a plurality of tenants within a network address translation (NAT) environment, wherein each of the plurality of tenants includes a group of network devices with non-overlapping internet protocol (IP) addresses. The method also includes tracking, via the global network node management system, a state of the NAT environment based on the communications.

Abstract: The present disclosure provides methods, computer-readable media, and systems for managing a network with a network management device. Vendor specific discovery protocol data can be collected with the network management device from a network device in response to the network device having vendor specific discovery protocol data. Vendor neutral discovery protocol data can be collected with the network management device in response to the network device having vendor neutral discovery protocol data. A network connection can be assessed using the at least one of the vendor specific discovery protocol data and the vendor neutral discovery protocol data.

Abstract: An automated method for ascertaining interconnectivity in a network comprises operating a customer edge device at a site that is physically linked with at least one provider edge router and communicates directly with peer sites via a virtual private network (VPN) connection. Inter-site connectivity is discovered among a plurality of customer edge devices in the network and effective communication paths among the plurality of customer edge devices across geographically distributed sites are presented.

Abstract: Router misconfiguration diagnosis is disclosed. A notification of a routing failure between a first node and a second node is received. A first interface associated with the first node is identified, and a second interface associated with the second node is identified. A first management information value and a second management information value, specific to a routing protocol, are determined. Matching status is determined between the first and second management information values. A diagnostic message is generated responsive to the notification.

Abstract: A system and method for communicating between a management station and at least two networks having duplicate Internet Protocol (IP) addresses. An IP address for an IP data packet to be sent to at least one of an end device and the management station is recognized. A header of the IP data packet with a tag that identifies one of the duplicate IP networks within which the end device resides is modified. The IP data packet is routed, based on the tag, in accordance with a policy.

Abstract: An automated method for ascertaining interconnectivity in a network comprises operating a customer edge device at a site that is physically linked with at least one provider edge router and communicates directly with peer sites via a virtual private network (VPN) connection. Inter-site connectivity is discovered among a plurality of customer edge devices in the network and effective communication paths among the plurality of customer edge devices across geographically distributed sites are presented.

Abstract: Router misconfiguration diagnosis is disclosed. A notification of a routing failure between a first node and a second node is received. A first interface associated with the first node is identified, and a second interface associated with the second node is identified. A first management information value and a second management information value, specific to a routing protocol, are determined. Matching status is determined between the first and second management information values. A diagnostic message is generated responsive to the notification.