Abstract: BGP Route Recorder (BRR) captures and dumps Border Gateway Protocol (BGP) messages received from BGP peers. Passive links are established between the BRR and BGP peers. All incoming and outgoing BGP messages are recorded and timestamped. Rather than tear down BGP peering sessions when errors are encountered, error conditions are recorded, and the BRR may be configured to maintain links across selected BGP errors.

Abstract: Packet tracing in switched packet networks. Tracing of live packet data in a network is performed by discovering the measurement path, setting up dynamic filters along the path to collect traffic information, and collecting data as detected by the dynamic filters. Collected data is sent to a measuring entity. Filter setup may be repeated to capture data as routing changes.

Abstract: A single probe collects link state routing protocol data for two or more areas. The areas may be located within one autonomous system or divided among multiple autonomous systems. Each autonomous system operates pursuant to a link state routing protocol. A router in each area is selected to share its link state routing protocol data with the probe. A logical connection is established between each selected router and the probe. The probe will begin the process of obtaining the routing information by creating an adjacency or partial adjacency with each selected router. The probe will receive link state routing protocol data from each selected router once adjacency is established. Alternatively a router in each area to be monitored is selected, and the probe polls the selected routers periodically for the appropriate SNMP MIB tables. The probe decodes the MIB data to obtain the link state routing protocol data.

Abstract: A system and method for discovering a routing topology within a domain of interest are disclosed. In accordance with certain embodiments, a Border Gateway Protocol (“BGP”) discovery engine is provided that enables auto-discovery of BGP routers in a specified domain of interest. For instance, such a BGP discovery engine may receive, as input, an identification of a domain of interest and a “seed” BGP router within such domain of interest, and may recursively query the BGP routers identified within the domain of interest for information to compile the topology of such BGP routers in such domain of interest.

Abstract: A routing monitor is disclosed comprising at least one communication tap, wherein each of the at least one communication taps is positioned in a line of communication between two routers and a protocol emulator for reassembling routing protocol messages captured by the at least one communication tap and opening a routing protocol connection with a network device using the reassembled routing protocol messages in response to a request for connection received from the network device.

Abstract: Discovering routing policies in information networks. Large networks such as Autonomous Systems are abstracted as a single network element. A plurality of taps on the borders of the abstracted element filter ingress/egress data which is forwarded for collection and correlation. By correlating information from different taps, routing policies are discovered. These discovered policies may be compared with published policies. Access control makes discovered policies and the comparisons with published policies selectively available depending on predefined access classes.

Abstract: A system for physical location self awareness in network connected devices comprises a location server acquiring locations of the devices from a real-time location system (RTLS) and an agent running on each of the devices, the agent querying the location server for a location of the device and storing location information for the device on that device. The system may comprise a plurality of RTLSs and a hierarchical server for searching for a location of a device starting from a last known location server outward. A method for providing location self awareness in network connected devices comprises establishing a location server for acquiring a location of the device from an RTLS, executing an agent on the device, instructing the device to send a query to the location server for location information for the device, and storing the location information for the device on the device.