![]() ![]() Origin IGP, metric 0, localpref 100, valid, internal Network Next Hop Metric LocPrf Weight PathīGP table version is 2, local router ID is 3.3.3.3īGP table version is 1, local router ID is 172.16.11.1īGP routing table entry for 4.4.4.4/32, version 0ġ72.12.23.4 (inaccessible) from 172.12.123.3 (3.3.3.3) ![]() Origin codes: i – IGP, e – EGP, ? – incomplete R RIB-failure, S Stale, m multipath, b backup-path, x best-external, f RT-Filter Status codes: s suppressed, d damped, h history, * valid, > best, i – internal, *Apr 16 08:22:56.783: %SYS-5-CONFIG_I: Configured from console by consoleīGP table version is 2, local router ID is 44.4.4.4 So let’s get into the configuration, all the Peerings are already configured, so I’ll start by configuring 4.4.4.4/32 to be advertised by R4, verify its in the ip bgp table, and move along to configuring R1 as the Route Reflector: Also note that R2 does not have an interface in the Ethernet segment to R4 in this lab.Ī BGP Speaker with a Peering does not HAVE to be a client, these are known as “nonclients”, however they do require a TCP connection to every other router in the AS (which we are trying to avoid in the first place with the reflector). Now as seen in the Topology I’ve changed it so the Spoke routers Peer to the Hub to avoid creating a full mesh network, and the Hub will reflect routes advertised from R2 to R3 and vice versa. IBGP Peers that send routes to the route reflector are called “clients”, and when the Reflector receives routes from clients, it reflects the routes to other clients all the while the clients have no idea they are getting their routes from a Route Reflector. A router configure to be a BGP Route Reflector can take a route learned from one iBGP Peer and advertise it to another iBGP Peer, which basically is the equivalent of “no ip split-horizon” only BGP style! ![]()
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