The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] GMPLS Doubt
Hi, I am aware that this is a MPLS mailing list but since i could not get this doubt clarified from any other place .. This is in reference to "Challenges for MPLS in Optical Network Restoration" by Robert Doverspike and Jennifer Yates which appeared in IEEE Communications Magazine (Feb 2001) The authors say that an "Optical transport system (OTS) multiplexes multiple optical signals onto a common fiber, necessitating the concept of a channel. An optical network connection is provisioned by cross connecting channels within individual OTSs along its path. This fact implies that zero-bandwidth paths cannot be established for later use. In contrast, in IP networks MPLS LSPs may be established such that if no packets are switched into the links along the path, no bandwidth is consumed. Switching packets onto these predefined paths at their endpoints is simple and rapid. This important difference between IP and optical networks becomes crucial in allocating restoration capacity" Can somebody help me understand the above? regards, mareline s. __________________________________________________ Do you Yahoo!? Yahoo! News - Today's headlines http://news.yahoo.com |
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