#Route reflector in bgp manual
#Route reflector in bgp full
#Route reflector in bgp free

To deal with this you have to full mesh your routers so they share all of the routes. Because AS-Path is the same and routes would be discarded. If you do not have full-mesh, iBGP peer which receives some routes from eBGP peer can’t forward those routes inside to other iBGP peers. That is why it is preferred to have a full-mesh of iBGP peers inside an organization. IBGP uses AS-Path attribute to detect routing loops.

#Route reflector in bgp free

I won’t be doing the first method where you need IGP but feel free to test it out. Network Next Hop Metric LocPrf Weight PathĪnd as you can see you have the default route now. (from the above output reveals the originator-ID and the cluster- list of prefix 30.1.1.R1(config-router)#neighbor 10.21.21.2 default-originate Origin IGP, metric 0, localpref 100, valid, internal, bestīGP routing table entry for 20.0.0.0/8, version 7 Origin IGP, metric 0, localpref 100, valid, internal Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcdīGP activity 3/0 prefixes, 7/3 paths, scan interval 60 secsīGP routing table entry for 30.0.0.0/8, version 3 R4(config-router)#neighbor 13.0.0.1 route-reflector-clientģ network entries using 432 bytes of memoryĢ/2 BGP path/bestpath attribute entries using 272 bytes of memoryġ BGP rrinfo entries using 24 bytes of memoryĠ BGP route-map cache entries using 0 bytes of memoryĠ BGP filter-list cache entries using 0 bytes of memoryīGP activity 3/0 prefixes, 5/1 paths, scan interval 60 secs R4(config-router)#neighbor 13.0.0.1 update-source loopback 0

R4(config-router)#neighbor 12.0.0.1 route-reflector-client R4(config-router)#neighbor 12.0.0.1 update-source loopback 0 R4(config-router)#neighbor 11.0.0.1 route-reflector-client R4(config-router)#neighbor 11.0.0.1 update-source loopback 0 R3(config-router)#neighbor 14.0.0.1 update-source loopback 0 R3(config-router)#neighbor 12.0.0.1 update-source loopback 0 R2(config-router)#neighbor 14.0.0.1 route-reflector-client R2(config-router)#neighbor 14.0.0.1 update-source loopback 0 R2(config-router)#neighbor 13.0.0.1 update-source loopback 0 *Jan 23 13:47:51.843: %BGP_SESSION-5-ADJCHANGE: neighbor 11.0.0.1 IPv4 Unicast topology base removed from session RR client config change R2(config-router)#neighbor 11.0.0.1 route-reflector-client R2(config-router)#neighbor 11.0.0.1 update-source loopback 0 R1(config-router)# neighbor 14.0.0.1 update-source loopback 0 R1(config-router)#neighbor 12.0.0.1 update-source loopback 0 H Address Interface Hold Uptime SRTT RTO Q Seq

#Route reflector in bgp manual

Interface IP-Address OK? Method Status ProtocolįastEthernet0/0 40.1.1.1 YES manual up upįastEthernet0/0 20.1.1.1 YES manual up upįastEthernet0/0 30.1.1.1 YES manual up up configure router 2 - 4 RR server and router 1 - 3 client.Configure EIGRP to provide the reachability between BGP speakers (peer).Configure the topology as er the diagram and assign the IP address.In our case we have two RR servers and it will establish neighbor with other servers and clients. If a route reflector (RR) receives a route with a cluster-list attribute containing its cluster-ID, the route is discarded.

If a router receives an IBGP route with the originate-id attribute set to its own router-ID, the route is discarded.

We have already learned what route reflector is and why we use route reflector. In this section we will see the configuration of two RR servers and will learn about deep RR behavior.Ī route reflector is a BGP router that is allowed to ignore the IBGP loop avoidance rule, such as is allowed to advertise updates received from an IBGP peer to another IBGP peer under specific conditions. BGP route reflector (RR) configuration of two RR servers