IS-IS Traffic Engineering (TE) is an extension of IS-IS to support MPLS TE. As specified in RFC 5305 and RFC 4205, IS-IS TE defines new TLVsand sub-TLVs in IS-IS LSPs to carry TE information, floods LSPs to implement the flooding and synchronization of TE information, and transmits TE information to the CSPF module. IS-IS TE supports MPLS …
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Protocol Load Balancing Equal-cost load balancing The CX600 supports multi-route mode. You can configure multiple routes with the same preference to the same destination. If there are no other routes with higher priorities to the target destination, these “equal-cost” routes are used. Packets transmitted to the target destination are sent along different routes and, in this way, …
Continue reading Basic Principles of Load Balancingl MPLS network forwards packet according to the label. But how does label be generated? What mechanism does MPLS adopt to implement data forwarding? l MPLS includes two plane: control plane and data plane. l Control plane’s charge is to generate and maintain routing information and label information. Data plane’s charge is conventional IP packet …
Continue reading MPLS StructurePurpose In a traditional IP network, a node select the shortest path as the route regardless of other factors such as bandwidth. The shortest path, however, may be congested with traffic, whereas other available paths are idle. Figure 1 Problems in Traditional Routing As shown in Figure 1, assume that links have the same metric. …
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