BGP is Among the most complex matters you’ll research when pursuing your CCNP, Otherwise the http://query.nytimes.com/search/sitesearch/?action=click&contentCollection®ion=TopBar&WT.nav=searchWidget&module=SearchSubmit&pgtype=Homepage#/토토사이트 most complicated. I am aware from personalized knowledge that Once i was earning my CCNP, BGP is the topic that gave me essentially the most trouble in the beginning. One thing I hold reminding currently’s CCNP candidates about, while, is that no Cisco know-how is not possible to understand if you just split it down and have an understanding of the fundamentals Before you begin attempting to know the more advanced configurations.
BGP attributes are one such subject matter. You’ve acquired nicely-identified required, perfectly-recognized discretionary, transitive, and non-transitive. You then’ve obtained Every single unique BGP attribute to recall, plus the buy in which BGP considers characteristics, and what attributes even are… as well as a great deal more! As with every other Cisco topic, we really need to wander before we could operate. Allow’s Have a look at what characteristics are and the things they do in BGP.
BGP characteristics are much like what metrics are to OSPF, RIP, IGRP, and EIGRP. You received’t see them detailed in the routing table, but attributes are what BGP considers When picking the very best path to your location when a number of legitimate (loop-free) paths exist.
When BGP has to come to a decision between such paths, There's an get during which BGP considers The trail attributes. For achievement over the CCNP tests, you have to know this purchase. BGP seems at path characteristics in this order:
Highest weight (Cisco-proprietary BGP price)
Optimum nearby choice (LOCAL_PREF)
Desire domestically originated route.
Shortest AS_PATH is chosen.
Choose route with cheapest origin code. Inside paths are most well-liked around external 안전공원 paths, and external paths are most well-liked above paths with the origin of “incomplete”.
Lowest multi-exit discriminator (MED)
Exterior BGP routes favored around Inner BGP routes.
If no external route, decide on route with cheapest IGP cost to the following-hop router for iBGP.
Pick out most up-to-date route.
Opt for lowest BGP RID (Router ID).
In case you don’t really know what these values are, or how they’re configured, don’t stress! The next various portions of this BGP tutorial will reveal everything. So shell out a while learning this get, and in part II of this cost-free BGP tutorial, we’ll examine Every single of such values intimately. Continue to keep learning!