Method and apparatus for obtaining information about paths...

H - Electricity – 04 – L

Patent

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Details

H04L 12/56 (2006.01) H04L 12/24 (2006.01) H04L 12/26 (2006.01)

Patent

CA 2473714

The present invention provides a method and apparatus for obtaining information about one or more paths terminating at a subject node for a group of packets by determining one or more nodes that are up line from the subject node for the group of packets and propagating a trace request to each node that is up line from the subject node for the group of packets until the trace request is received at all of the ingress nodes for the group of packets. A trace reply responsive to each trace request is then created and sent. At least one trace reply is then received at the subject node. The information about the one or more paths terminating at the subject node for the group of packets is obtained from the trace replies received at the subject node.

L'invention concerne un procédé et un dispositif permettant d'obtenir des informations concernant un ou plusieurs chemins aboutissant à un noeud cible pour un groupe de paquets. Le procédé décrit dans l'invention consiste à déterminer un ou de plusieurs noeuds situés en amont du noeud cible pour le groupe de paquets puis, à distribuer une demande de traçage à chaque noeud situé en amont dudit noeud cible pour le groupe de paquets jusqu'à réception de cette demande de traçage par tous les noeuds de captage pour le groupe de paquets. En réaction à chaque demande de traçage, une réponse de traçage est produite puis envoyée. Au moins une réponse de traçage est ensuite reçue par le noeud cible. Les informations concernant le ou les chemins aboutissant au noeud cible pour le groupe de paquets sont obtenues à partir des réponses de traçage reçues par le noeud cible.

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