Abstract: Techniques for accurate determination of service impact are provided by provisioning network deployed probes with actual business object information related to business entities, such as VPN sites. Such probes are capable of sending a network trap (or alarm) containing actual business information in response to detecting a loss of connectivity. As a result, service impact caused by the loss of connectivity may be determined accurately by simply parsing the contents of a network trap, thus avoiding the complication and inaccuracy of conventional impact analysis.

Abstract: In one embodiment, a technique for efficient display of trouble ticket information is provided. The technique involves presenting a single view of disparate sets of data as a multi-dimensional graph. A weighting function may be applied to branches of the graph and the graph updated to reflect the results of application of the weighting function.

Abstract: In one embodiment, a technique for detecting a break in a pseudowire and automatic shutting down user network interface (UNI) ports affected by the break is provided. In response to the loss of connectivity on the shut down ports, customer edge devices may automatically switch over to redundant circuits (e.g., other UNI ports not affected by the break in the pseudowire) and establish a different pseudowire.

Abstract: In one embodiment, a technique for detecting the re-marking of a parameter in a network packet is provided. The technique involves sending a request packet that contains a first value of a type of service parameter effecting how the packet is to be handled relative to other packets and receiving a response packet to the request packet, the response packet containing an indication of a second value of the type of service parameter in the request packet as received by a network device that sent the response packet. The first and second values of the type of service parameter are compared. A determination that the request packet was re-marked is made if the first and second values of the type of service parameter do not match.

Abstract: Techniques and apparatus that allow for accurate determination of network topology utilizing multicast groups are provided. A multicast group may be established that contains a set of VPN endpoints to be monitored. By sending ping packets from each provider edge endpoint to the multicast group, ping responses (with unicast addresses for responders) may be collected and analyzed to determine reachability of the endpoints.

Abstract: In one embodiment, a technique for detecting a break in a pseudowire and automatic shutting down user network interface (UNI) ports affected by the break is provided. In response to the loss of connectivity on the shut down ports, customer edge devices may automatically switch over to redundant circuits (e.g., other UNI ports not affected by the break in the pseudowire) and establish a different pseudowire.

Abstract: In one embodiment, a technique for efficient display of trouble ticket information is provided. The technique involves presenting a single view of disparate sets of data as a multi-dimensional graph. A weighting function may be applied to branches of the graph and the graph updated to reflect the results of application of the weighting function.

Abstract: In one embodiment, a technique for detecting the re-marking of a parameter in a network packet is provided. The technique involves sending a request packet that contains a first value of a type of service parameter effecting how the packet is to be handled relative to other packets and receiving a response packet to the request packet, the response packet containing an indication of a second value of the type of service parameter in the request packet as received by a network device that sent the response packet. The first and second values of the type of service parameter are compared. A determination that the request packet was re-marked is made if the first and second values of the type of service parameter do not match.

Abstract: Techniques and apparatus that allow for accurate determination of network topology utilizing multicast groups are provided. A multicast group may be established that contains a set of VPN endpoints to be monitored. By sending ping packets from each provider edge endpoint to the multicast group, ping responses (with unicast addresses for responders) may be collected and analyzed to determine reachability of the endpoints.

Abstract: Techniques for accurate determination of service impact are provided by provisioning network deployed probes with actual business object information related to business entities, such as VPN sites. Such probes are capable of sending a network trap (or alarm) containing actual business information in response to detecting a loss of connectivity. As a result, service impact caused by the loss of connectivity may be determined accurately by simply parsing the contents of a network trap, thus avoiding the complication and inaccuracy of conventional impact analysis.