BGP is Probably the most intricate subjects you’ll study when pursuing your CCNP, if not probably the most elaborate. I realize from personalized working experience that Once i was earning my CCNP, BGP is the topic that gave me the most difficulty to start with. One thing I continue to keep reminding these days’s CCNP candidates about, even though, is always that no Cisco engineering is not possible to grasp if you only split it down and understand the basics before you start attempting to be aware of the more elaborate configurations.
BGP attributes are 1 먹튀검증 these kinds of matter. You’ve obtained effectively-recognized obligatory, nicely-identified discretionary, transitive, and non-transitive. Then you really’ve bought Every single unique BGP attribute to recall, and also the get through which BGP considers attributes, and what attributes even are… and also a lot extra! As with all other Cisco subject matter, we really need to wander right before we can run. Let’s Consider what https://www.washingtonpost.com/newssearch/?query=먹튀검증 attributes are and the things they do in BGP.
BGP characteristics are very like what metrics are to OSPF, RIP, IGRP, and EIGRP. You received’t see them listed inside a routing desk, but characteristics are what BGP considers When picking the very best path to some place when multiple valid (loop-totally free) paths exist.
When BGP has to come to a decision amongst these paths, There may be an purchase by which BGP considers the path attributes. For achievement to the CCNP exams, you have to know this purchase. BGP seems at route attributes in this purchase:
Greatest bodyweight (Cisco-proprietary BGP value)
Optimum area preference (LOCAL_PREF)
Desire locally originated route.
Shortest AS_PATH is preferred.
Pick out route with least expensive origin code. Inside paths are preferred above external paths, and exterior paths are desired around paths using an origin of “incomplete”.
Lowest multi-exit discriminator (MED)
External BGP routes preferred more than Inner BGP routes.
If no external route, choose path with least expensive IGP Value to the following-hop router for iBGP.
Select newest route.
Select most affordable BGP RID (Router ID).
For those who don’t know what these values are, or how they’re configured, don’t panic! The next many areas of this BGP tutorial will explain it all. So invest some time learning this order, and partly II of the totally free BGP tutorial, we’ll check out each of these values intimately. Continue to keep learning!