BGP is One of the more advanced subjects you’ll research when pursuing your CCNP, Otherwise probably the most complex. I understand from particular encounter that Once i was earning my CCNP, BGP is The subject that gave me probably the most hassle at first. Something I keep reminding now’s CCNP candidates about, although, is always that no Cisco technology is not possible to comprehend http://query.nytimes.com/search/sitesearch/?action=click&contentCollection®ion=TopBar&WT.nav=searchWidget&module=SearchSubmit&pgtype=Homepage#/토토사이트 if you merely split it down and have an understanding of the basics Before you begin seeking to grasp the more sophisticated configurations.
BGP characteristics are a single these kinds of matter. You’ve obtained well-identified obligatory, very well-identified discretionary, transitive, and non-transitive. Then you’ve obtained Each individual individual BGP 먹튀검증업체 attribute to recall, plus the buy during which BGP considers attributes, and what characteristics even are… and a whole lot extra! As with all other Cisco subject, we really need to wander right before we can easily run. Allow’s take a look at what characteristics are and what they do in BGP.
BGP characteristics are very like what metrics are to OSPF, RIP, IGRP, and EIGRP. You gained’t see them detailed inside of a routing table, but attributes are what BGP considers When selecting the most beneficial route to some place when various valid (loop-no cost) paths exist.
When BGP has to make a decision in between these kinds of paths, There's an purchase during which BGP considers the path characteristics. For fulfillment around the CCNP tests, you need to know this buy. BGP appears to be like at path attributes During this get:
Best excess weight (Cisco-proprietary BGP value)
Greatest local choice (LOCAL_PREF)
Choose regionally originated route.
Shortest AS_PATH is chosen.
Opt for route with lowest origin code. Inner paths are most well-liked about exterior paths, and exterior paths are favored more than paths by having an origin of “incomplete”.
Least expensive multi-exit discriminator (MED)
External BGP routes most well-liked above Internal BGP routes.
If no exterior route, select route with least expensive IGP Price tag to another-hop router for iBGP.
Pick newest route.
Select least expensive BGP RID (Router ID).
If you don’t know very well what these values are, or how they’re configured, don’t worry! The following several parts of this BGP tutorial will demonstrate everything. So expend a while learning this purchase, and partly II of this cost-free BGP tutorial, we’ll have a look at Each and every of these values in detail. Keep learning!