Title:
METHOD FOR EXAMINING THE CONNECTIVITY OF LINKS IN MPLS-NETWORKS
Kind Code:
A1
Abstract:
Abstract not available for EP1500238
Abstract of corresponding document: WO03094444
The aim of the invention is to carry out an examination of the connectivity of MPLS-links in MPLS-networks. Specially formed MPLS-OAM-packets (OAM-ECHO-packets) are introduced into the traffic flow of user data packets and are supplied to other communication devices along the link. Each respective OAM-ECHO packet is copied, intermediately stored and re-routed in said communication device. The copied and intermediately stored packet is then retransmitted in the reverse direction, in the direction of the source where all in-coming copies are registered until the OAM-ECHO-packet is either extracted in the OAM-sink or if a pre-determined time span has been exceeded. Using the received and/or non-received copied of said packets, it is possible to determine if the connectivity of the connections (LSP) is guaranteed.


Inventors:
Klink, Joachim (DE)
Application Number:
EP20030727218
Publication Date:
01/26/2005
Filing Date:
04/24/2003
Assignee:
SIEMENS AG (DE)
International Classes:
H04L12/26; H04L12/723; (IPC1-7): H04L12/56; H04L12/26
European Classes:
H04L12/56C121; H04L12/26T
View Patent Images:
Other References:
See references of WO 03094444A1