BGP is Just about the most complex subjects you’ll examine when pursuing your CCNP, if not probably the most intricate. I realize from particular encounter that After i was earning my CCNP, BGP is The subject that gave me by far the most trouble in the beginning. Another thing I preserve reminding now’s CCNP candidates about, even though, is always that no Cisco technology is impossible to be aware of if you only crack it down and recognize the fundamentals before you start making an attempt to grasp the more elaborate configurations.
BGP characteristics are one these kinds of matter. You’ve received nicely-identified necessary, nicely-acknowledged discretionary, transitive, and non-transitive. Then you’ve received each particular person BGP attribute to recall, as well as the get during which BGP considers characteristics, and what attributes even are… and a large amount much more! As with every other Cisco topic, we really need to stroll right before we could operate. Enable’s Check out what characteristics are and whatever they do in BGP.
BGP characteristics are very like what metrics are to OSPF, RIP, IGRP, and EIGRP. You gained’t see them mentioned in a very routing table, but attributes are what BGP considers when choosing the very best route to a vacation spot when many valid (loop-cost-free) paths exist.
When BGP has to determine in between such paths, There may be an purchase wherein BGP considers The trail characteristics. For success around the CCNP examinations, you have to know this buy. BGP appears to be like at route characteristics With this buy:
Greatest body weight (Cisco-proprietary BGP value)
Best area desire (LOCAL_PREF)
Desire domestically originated route.
Shortest AS_PATH is preferred.
Opt for route with least expensive origin code. Inner paths are most well-liked around external http://www.thefreedictionary.com/토토사이트 paths, and external paths are desired more than paths having an origin of “incomplete”.
Most affordable multi-exit discriminator (MED)
Exterior BGP routes most popular over Internal BGP routes.
If no external route, decide on path with cheapest IGP Charge to the following-hop router for iBGP.
Pick newest route.
Select least expensive BGP RID (Router ID).
Should you don’t really know what these values are, or 메이저사이트 how they’re configured, don’t stress! The next numerous elements of this BGP tutorial will clarify all of it. So expend some time researching this get, and partly II of the totally free BGP tutorial, we’ll examine Every of those values intimately. Maintain researching!