BGP is The most elaborate subjects you’ll examine when pursuing your CCNP, if not quite possibly the most complex. I know from own experience that when I was earning my CCNP, BGP is the topic that gave me by far the most difficulty at the beginning. Another thing I maintain reminding right now’s CCNP candidates about, while, is no Cisco technology is impossible to be aware of if you only split it down and have an understanding of the basics Before you begin making an attempt to be familiar with the more complex configurations.
BGP attributes are one particular this sort of topic. You’ve bought well-identified obligatory, nicely-known discretionary, transitive, and non-transitive. Then you’ve acquired Each and every personal BGP attribute to remember, as well as get where BGP considers attributes, and what attributes even are… and a good deal extra! As with every other Cisco subject, we really need to wander prior to we can easily run. Permit’s take a look at what characteristics are and what they do in BGP.
BGP characteristics are much like what metrics are to OSPF, RIP, IGRP, and EIGRP. You received’t see them stated inside of a routing table, but characteristics are what BGP considers when choosing the best route to a location when numerous legitimate (loop-absolutely free) paths exist.
When BGP has to decide concerning these paths, There exists an order in which BGP considers The trail characteristics. For fulfillment over the CCNP exams, you need to know this order. BGP appears to be like at path characteristics in this get:
Greatest fat (Cisco-proprietary BGP benefit)
Highest nearby desire (LOCAL_PREF)
Prefer locally originated route.
Shortest AS_PATH is most popular.
Pick route with lowest origin code. Inner paths are most popular more than exterior paths, and exterior paths are most popular more than paths having an origin of “incomplete”.
Most affordable multi-exit discriminator (MED)
External BGP routes preferred over Inside BGP routes.
If no exterior route, find route with lowest 토토사이트 IGP Charge to the following-hop router for iBGP.
Choose most up-to-date route.
Pick out most affordable BGP RID (Router ID).
For those who don’t understand what these values are, or how they’re configured, don’t worry! Another various aspects of this BGP tutorial will describe everything. So spend some time finding http://query.nytimes.com/search/sitesearch/?action=click&contentCollection®ion=TopBar&WT.nav=searchWidget&module=SearchSubmit&pgtype=Homepage#/먹튀검증 out this buy, and partially II of this free BGP tutorial, we’ll have a look at Just about every of such values intimately. Retain learning!