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 ConvergenceIPRAN
What 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 EverythingHierarchy Of VPN – HoVPN Hierarchical Model and Plane Model On a BGP/MPLS IP VPN, as the key devices, PEs perform the following functions: PEs ensure the access for users, and thus require a great number of interfaces. PEs manage and advertise VPN routes, and process user packets. Thus, the PEs require large-capacity memory and …
Continue reading Hierarchy Of VPN – HoVPNA local CCC connection refers to the connection between two local CEs, that is, two CEs connected to the same PE. Similar to a Layer 2 switch, the PE can switch traffic without the need to set up a static LSP. Networking Requirements Figure 1 shows the CE is connected with the PE through a POS …
Continue reading Configure a CCC Local ConnectionNetworking Requirements As shown in Figure 1, two routers, PE1 and PE2, are PEs to be enabled with the VPLS function. CE1 is connected with PE1, while CE2 is connected with PE2. CE1 and CE2 belong to the same VPLS. After the VPLS configuration, interworking between CE1 and CE2 is available. In the network, construct a …
Continue reading Configuring Martini VPLSVPLS is an L2VPN technology based on MPLS and Ethernet technologies. VPLS can provide the multipoint-to-multipoint VPN services, which is better than the earlier point-to-point L2VPN services, and L3VPN services requiring carriers to manage the routing information. In the drafts relevant to VPLS, two VPLS network architectures are proposed: VPLS with PWs logically fully meshed …
Continue reading Basic Principles of VPLSNetworking Requirements The integrated L2VPN access to L3VPN solution allows Ethernet NodeBs to communicate with Radio Network Controllers (RNCs). It terminates the L2VPN and connects the L3VPN on a SR by creating a Virtual Ethernet group (VE-group). PW redundancy is configured to protect PWs on the L2VPN and VPN FRR is configured to protect links …
Continue reading Configuring an Integrated IP RAN (PWE3 + L3VPN) with Ethernet NodeBs