BGP Archives - Network Solution https://blog.network-solution.net/category/bgp/ Mon, 21 Jun 2021 21:44:45 +0000 en-US hourly 1 https://wordpress.org/?v=6.5.7 https://blog.network-solution.net/wp-content/uploads/2021/06/favicon.ico BGP Archives - Network Solution https://blog.network-solution.net/category/bgp/ 32 32 88039135 Example for Configuring BGP Auto FRR https://blog.network-solution.net/example-for-configuring-bgp-auto-frr/?utm_source=rss&utm_medium=rss&utm_campaign=example-for-configuring-bgp-auto-frr https://blog.network-solution.net/example-for-configuring-bgp-auto-frr/#comments Wed, 20 Apr 2016 21:18:02 +0000 http://blog.network-solution.net/?p=478 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 …

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]]> https://blog.network-solution.net/example-for-configuring-bgp-auto-frr/feed/ 1 478 BGP Auto FRR https://blog.network-solution.net/bgp-auto-frr/?utm_source=rss&utm_medium=rss&utm_campaign=bgp-auto-frr https://blog.network-solution.net/bgp-auto-frr/#respond Wed, 20 Apr 2016 21:04:55 +0000 http://blog.network-solution.net/?p=476 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 …

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]]> https://blog.network-solution.net/bgp-auto-frr/feed/ 0 476 BGP GR “Graceful Restart “ https://blog.network-solution.net/bgp-gr-graceful-restart-2/?utm_source=rss&utm_medium=rss&utm_campaign=bgp-gr-graceful-restart-2 https://blog.network-solution.net/bgp-gr-graceful-restart-2/#respond Wed, 20 Apr 2016 21:04:46 +0000 http://blog.network-solution.net/?p=474 Graceful 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 …

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]]> https://blog.network-solution.net/bgp-gr-graceful-restart-2/feed/ 0 474 MP-BGP https://blog.network-solution.net/mp-bgp/?utm_source=rss&utm_medium=rss&utm_campaign=mp-bgp https://blog.network-solution.net/mp-bgp/#respond Wed, 20 Apr 2016 20:56:43 +0000 http://blog.network-solution.net/?p=472 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. …

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]]> https://blog.network-solution.net/mp-bgp/feed/ 0 472 Basic BGP/MPLS IP VPN https://blog.network-solution.net/basic-bgpmpls-ip-vpn/?utm_source=rss&utm_medium=rss&utm_campaign=basic-bgpmpls-ip-vpn https://blog.network-solution.net/basic-bgpmpls-ip-vpn/#respond Mon, 28 Sep 2015 14:21:36 +0000 http://blog.network-solution.net/?p=273 A 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 …

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]]> https://blog.network-solution.net/basic-bgpmpls-ip-vpn/feed/ 0 273 BGP Route Reflector ” RR” https://blog.network-solution.net/bgp-route-reflector-rr/?utm_source=rss&utm_medium=rss&utm_campaign=bgp-route-reflector-rr https://blog.network-solution.net/bgp-route-reflector-rr/#respond Sun, 06 Sep 2015 12:50:32 +0000 http://blog.network-solution.net/?p=264 Fully 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 …

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]]> https://blog.network-solution.net/bgp-route-reflector-rr/feed/ 0 264 BGP Path Selection Algorithm in Cisco, Huawei and Juniper https://blog.network-solution.net/bgp-path-selection-algorithm-in-cisco-huawei-and-juniper/?utm_source=rss&utm_medium=rss&utm_campaign=bgp-path-selection-algorithm-in-cisco-huawei-and-juniper https://blog.network-solution.net/bgp-path-selection-algorithm-in-cisco-huawei-and-juniper/#respond Tue, 05 May 2015 23:36:00 +0000 http://blog.network-solution.net/?p=138 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 …

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]]> https://blog.network-solution.net/bgp-path-selection-algorithm-in-cisco-huawei-and-juniper/feed/ 0 138 Configuring Load Balancing Among EBGP and IBGP Routes When CEs Are Dual-Homed https://blog.network-solution.net/configuring-load-balancing-among-ebgp-and-ibgp-routes-when-ces-are-dual-homed/?utm_source=rss&utm_medium=rss&utm_campaign=configuring-load-balancing-among-ebgp-and-ibgp-routes-when-ces-are-dual-homed https://blog.network-solution.net/configuring-load-balancing-among-ebgp-and-ibgp-routes-when-ces-are-dual-homed/#respond Wed, 29 Apr 2015 15:17:35 +0000 http://blog.network-solution.net/?p=132 Configuring Load Balancing Among EBGP and IBGP Routes When CEs Are Dual-Homed When a CE is dual homed to two PEs, if one PE is in the same AS as the remote PE, whereas the other PE is not in the same AS as the remote PE, you can configure EBGP and IBGP route load …

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]]> https://blog.network-solution.net/configuring-load-balancing-among-ebgp-and-ibgp-routes-when-ces-are-dual-homed/feed/ 0 132 Basic Principle of BGP https://blog.network-solution.net/basic-principle-of-bgp/?utm_source=rss&utm_medium=rss&utm_campaign=basic-principle-of-bgp https://blog.network-solution.net/basic-principle-of-bgp/#respond Fri, 27 Mar 2015 13:20:23 +0000 http://blog.network-solution.net/?p=90 BGP Operating Modes BGP operates on a CX device in either of the following modes, as shown in Figure 1: Internal BGP (IBGP) External BGP (EBGP) BGP is called IBGP when it runs within an AS; it is called EBGP when it runs between ASs. Figure 1 BGP operating modes Roles in Transmitting BGP Messages …

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