OSPF fast convergence is an extended feature of OSPF implemented to speed up the convergence of routes. It includes the following: I-SPF Incremental SPF (I-SPF) recalculates only the routes of the changed nodes rather than all the nodes when the network topology changes. This speeds up the calculation of routes. PRC Partial Route Calculation (PRC) …
Continue reading OSPF Fast Convergenceimplementing load balancing through IS-IS: Networking Requirements As shown in Figure 1: CX- A, CX- B, CX- C, and CX- D run IS-IS to implement interconnection in the IP network. CX- A, CX- B, CX- C, and CX- D are Level-2 routers in area 10. Load balancing is required to transmit the traffic of CX- A to CX- D through CX- B and CX- C. Figure 1 Networking diagram of configuring IS-IS load balancing Device Interface IP Address Device …
Continue reading Configuring IS-IS Load BalancingProtocol 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 BalancingWhat Is BFD? Bidirectional Forwarding Detect (BFD) · Provides low-overhead and short-period detection for a failure on a path between adjacent forwarding engines. It detects a failure that may occur on an interface, a data link, or even a forwarding engine itself. · Provides a uniform mechanism to detect failures over any media and at …
Continue reading BFD ( Bidirectional Forwarding Detect ) for EverythingNetworking Requirements The Level 1 carrier and the Level 2 carrier are in the same AS. The Level 2 carrier provides the BGP/MPLS IP VPN service for its customers. In Figure 1: PE1 and PE2 are PEs of the Level 1 carrier’s backbone. CE1 and CE2 belong to the Level 2 carrier and access the backbone …
Continue reading Configuring the Carrier’s Supporting Carrier in the Same ASHere we can find an example on how to configure the second carrier to provide BGP/MPLS IP VPN services when first carrier and the second carrier are in different ASs. Networking Requirements As shown in Figure 1, the Level 1 carrier and the Level 2 carrier are in different ASs. The Level 2 carrier provides BGP/MPLS …
Continue reading Configuring the Carrier’s Supporting Carrier (Inter-AS)A customer of an SP providing the BGP/MPLS IP VPN service may also be an SP. In this case, the SP providing the BGP/MPLS IP VPN service is called the provider carrier or the first carrier; the customer is called the customer carrier or the second carrier, as shown in Figure 1. This networking model is …
Continue reading Carrier’s Supporting Carrier CSC