Title :
Constraint-based LSP setup by message reversing of CR-LDP
Author :
Kim, Byeongsik ; Chun, Woojik ; Yoo, Jaeho
Author_Institution :
Dept. of Comput. Eng., Chungnam Nat. Univ., Taejon, South Korea
Abstract :
We investigate the problem of constraint-based routing that is one key component of traffic engineering. In constraint-based routing, resource information in addition to topology information is maintained in a database on all participating nodes in the routing domain. Especially the resource information of the links is changed rapidly because the bandwidth availability, for example, is changed whenever new LSPs are established and terminated. Therefore, the information used to compute a constraint-based path may be out-of-date. This means an LSP setup request may be blocked because a link or a node along the selected LSP has insufficient resources. This paper discusses the impact of inaccurate link state information, an LSP setup method coping with the inaccuracies, a new mechanism that allows constraint-based LSP setup and restoration, and gains obtained by our new mechanism
Keywords :
network topology; telecommunication network routing; telecommunication traffic; transport protocols; CR-LDP; Internet; LSP setup request; MPLS; bandwidth availability; constraint-based LSP restoration; constraint-based LSP setup; constraint-based path; database; inaccurate link state information; label distribution protocol; message reversal; multiprotocol label switching; resource information; topology information; traffic engineering; Availability; Bandwidth; Maintenance engineering; Multiprotocol label switching; Protocols; Routing; Signal processing; Telecommunication computing; Telecommunication traffic; Web and internet services;
Conference_Titel :
Information Networking, 2001. Proceedings. 15th International Conference on
Conference_Location :
Beppu City, Oita
Print_ISBN :
0-7695-0951-7
DOI :
10.1109/ICOIN.2001.905622
