As shown in Figure 1, Router A belongs to AS 100; Router B, Router C, and Router D belong to AS 200. BGP Auto FRR needs to be configure so that the route from Router A to Router D can have backup forwarding information. Figure 1 Networking diagram of configuring BGP Auto FRR Configuration Roadmap …
Continue reading Example for Configuring BGP Auto FRRBGP
As a protection measure against faults over links, BGP Auto Fast Reroute (FRR) is applicable to networks with primary and backup links. With BGP Auto FRR, traffic can be switched between two BGP peers or next hops within sub-seconds. With BGP Auto FRR, if a peer has multiple routes with the same prefix that are …
Continue reading BGP Auto FRRGraceful restart (GR) is one of the high availability (HA) technologies, which comprise a series of comprehensive technologies such as fault-tolerant redundancy, link protection, faulty node recovery, and traffic engineering. As a fault-tolerant redundancy technology, GR ensures normal forwarding of data during the restart of routing protocols to prevent interruption of key services. Currently, GR …
Continue reading BGP GR “Graceful Restart “Conventional BGP-4 manages only IPv4 unicast routing information, and inter-AS transmission of packets of other network layer protocols, such as IPv6 and multicast, is limited. To support multiple network layer protocols, the Internet Engineering Task Force (IETF) extends BGP-4 to Multiprotocol Extensions for BGP-4 (MP-BGP). RFC 4760 defines the MP-BGP standard. MP-BGP is forward compatible. …
Continue reading MP-BGPA basic BGP/MPLS IP VPN is an L3VPN network that covers only one carrier’s network, which is an MPLS backbone network that does not span multiple ASs, as shown in Figure 1. A basic BGP/MPLS IP VPN has the following characteristics: Transmits packets using extended BGP. Encapsulates and transmits VPN packets over MPLS LSPs serving as …
Continue reading Basic BGP/MPLS IP VPNFully meshed connections need to be established between IBGP peers to ensure the connectivity between IBGP peers. If there are n CX devices in an AS, n x (n-1)/2 IBGP connections need to be established. When there are a lot of IBGP peers, network resources and CPU resources are greatly consumed. Route reflection can solve the …
Continue reading BGP Route Reflector ” RR”BGP Path Selection Algorithm Border Gateway Protocol (BGP) routers typically receive multiple paths to the samedestination. The BGP best path algorithm decides which is the best path toinstall in the IP routing table and to use for traffic forwarding. How the Best Path Algorithm Works BGP assigns the first valid path as the …
Continue reading BGP Path Selection Algorithm in Cisco, Huawei and Juniper