BGP is Probably the most elaborate subjects you’ll review when pursuing your CCNP, if 안전놀이터 not one of the most elaborate. I know from http://query.nytimes.com/search/sitesearch/?action=click&contentCollection®ion=TopBar&WT.nav=searchWidget&module=SearchSubmit&pgtype=Homepage#/토토사이트 personal working experience that when I was earning my CCNP, BGP is The subject that gave me by far the most difficulty to start with. Something I maintain reminding right now’s CCNP candidates about, though, is usually that no Cisco technologies is unachievable to be aware of if you merely crack it down and fully grasp the basic principles before you start seeking to be familiar with the greater advanced configurations.
BGP characteristics are a person these kinds of subject. You’ve bought very well-known required, nicely-regarded discretionary, transitive, and non-transitive. Then you really’ve bought Each individual individual BGP attribute to recall, as well as the buy through which BGP considers characteristics, and what characteristics even are… and a great deal additional! As with any other Cisco topic, we really need to wander ahead of we could operate. Let’s take a look at what attributes are and the things they do in BGP.
BGP attributes are very like what metrics are to OSPF, RIP, IGRP, and EIGRP. You received’t see them outlined within a routing table, but attributes are what BGP considers when choosing the ideal route to the place when various legitimate (loop-absolutely free) paths exist.
When BGP has to choose amongst this sort of paths, There is certainly an buy where BGP considers the path attributes. For success around the CCNP examinations, you have to know this buy. BGP appears at path attributes With this buy:
Maximum pounds (Cisco-proprietary BGP value)
Optimum neighborhood preference (LOCAL_PREF)
Favor regionally originated route.
Shortest AS_PATH is most popular.
Decide on route with lowest origin code. Inner paths are desired in excess of external paths, and exterior paths are desired more than paths having an origin of “incomplete”.
Least expensive multi-exit discriminator (MED)
Exterior BGP routes chosen about Inside BGP routes.
If no external route, find path with cheapest IGP Charge to another-hop router for iBGP.
Select most recent route.
Choose lowest BGP RID (Router ID).
Should you don’t determine what these values are, or how they’re configured, don’t stress! Another several elements of this BGP tutorial will clarify it all. So expend a while researching this get, and partially II of the cost-free BGP tutorial, we’ll check out Just about every of these values intimately. Keep researching!
