BGP is Just about the most complex matters you’ll examine when pursuing your CCNP, Otherwise one of the most complicated. I understand from personalized practical experience that After i was earning my CCNP, BGP is The subject that gave me the most hassle initially. One thing I retain reminding these days’s CCNP candidates about, however, is usually that no Cisco technological innovation is impossible to http://query.nytimes.com/search/sitesearch/?action=click&contentCollection®ion=TopBar&WT.nav=searchWidget&module=SearchSubmit&pgtype=Homepage#/토토사이트 know if you merely split it down and realize the basics before you start making an attempt to comprehend the more complicated configurations.
BGP characteristics are just one such matter. You’ve bought well-recognized necessary, well-identified discretionary, transitive, and non-transitive. Then you really’ve received Every single unique BGP attribute to recollect, and also the buy wherein BGP considers characteristics, and what characteristics even are… along with a lot extra! As with every other Cisco subject matter, we really need to wander before we will operate. Permit’s Check out what characteristics are and the things they do in BGP.
BGP attributes are much like what metrics are 안전놀이터 to OSPF, RIP, IGRP, and EIGRP. You received’t see them shown inside a routing desk, but characteristics are what BGP considers when choosing the ideal path to a desired destination when numerous legitimate (loop-free) paths exist.
When BGP has to come to a decision involving these kinds of paths, There exists an order in which BGP considers The trail characteristics. For fulfillment to the CCNP examinations, you need to know this order. BGP appears to be at path characteristics In this particular buy:
Best body weight (Cisco-proprietary BGP value)
Maximum local desire (LOCAL_PREF)
Favor domestically originated route.
Shortest AS_PATH is most popular.
Select route with least expensive origin code. Inner paths are preferred more than external paths, and exterior paths are chosen over paths with the origin of “incomplete”.
Least expensive multi-exit discriminator (MED)
Exterior BGP routes chosen in excess of Inner BGP routes.
If no exterior route, pick out route with most affordable IGP Charge to the following-hop router for iBGP.
Decide on most up-to-date route.
Pick most affordable BGP RID (Router ID).
In the event you don’t know very well what these values are, or how they’re configured, don’t panic! The following various aspects of this BGP tutorial will clarify it all. So spend some time studying this purchase, and partially II of this no cost BGP tutorial, we’ll take a look at Every of these values intimately. Continue to keep studying!