November 2005
Intermediate to advanced
480 pages
13h 38m
English
Content preview from OSPF and IS-IS: Choosing an IGP for Large-Scale Networks
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11.4. IS-IS Extensions for Traffic Engineering
The IS-IS extensions for traffic engineering support are specified in RFC 3784.[6] Semantically, the extensions are the same as those for OSPF: The same TE parameters are communicated, the same value ranges are used (such as 4 bytes for the maximum bandwidth parameter), and the values are represented the same (such as bandwidth values in bytes per second). And, as with OSPF, sub-TLVs—TLVs nested within the value fields of other TLVs—are used to carry the TE parameters.
[6] Henk Smit and Tony Li, “Intermediate System to Intermediate System (IS-IS) Extensions for Traffic Engineering (TE),” RFC 3784, June 2004.
The sub-TLVs carrying TE parameters are carried in the Extended IS Reachability (type 22) ...
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