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When you're studying for the BSCI assessment on the solution to making your CCNP certification, you have surely got to learn the use of BGP attributes. These attributes allow you to manipulate the trail or paths that BGP uses to reach certain destination when numerous paths to that destination occur. Within this free BGP guide, we're likely to take a look in the NEXT_HOP attribute. Discover further on the affiliated wiki by clicking click here. Perhaps you are thinking "hey, how difficult may this attribute be?" It's not very complex at all, but this being Cisco, there is got to be at least one unusual detail about it, right? The NEXT_HOP attribute is simple enough - this attribute indicates the next-hop IP that should be taken to attain a destination. In the following illustration, R1 is a link hub and R3 and R2 are spokes. All three routers come in BGP AS 100, with R1 having a relationship with both R3 and R2. There's no BGP peering between R2 and R3. R3 is advertising the network 33.3.0.0 /24 via BGP, and the value of the characteristic on R1 is the IP on R3 that is used in the peer relationship, 172.12.123.3. The matter with the next-hop credit will come in when the route is marketed to BGP peers. If R3 were in a separate AS from R1 and R2, the route would be then advertised by R1 to R2 using the next-hop attribute set to 172.12.123.3. Hit this hyperlink logo to explore the purpose of it. The value is kept, whenever a BGP speaker advertises a route to iBGP peers that was initially learned from an eBGP expert. Here, all three routers come in AS 100. What will the next-hop feature be set to when R1 advertises the approach to its iBGP friend R2? R2#show ip bgp < no production > There will be no next-hop feature for the route on R2, since the route will not look on R2. Automatically, a BGP speaker won't advertise a to iBGP neighbors when the route was initially learned from another iBGP neighbor. Should you need to learn more about continue reading, there are tons of resources you should consider investigating. Fortunately for all of us, there are numerous ways around this concept. The most common is using route reflectors, and we'll look at RRs in a future free BGP tutorial.. In case you require to learn more on linklicious vs nuclear link crawler, there are many resources people should investigate.