BGP is one of the most complex topics you’ll study when pursuing your CCNP, Otherwise one of the most complicated. I am aware from personal encounter 안전놀이터 that Once i was earning my CCNP, BGP is The subject that gave me quite possibly the most difficulty in the beginning. Another thing I hold reminding these days’s CCNP candidates about, however, is the fact that no Cisco engineering is extremely hard to understand if you only crack it down and recognize the fundamentals before you start hoping to understand the greater complicated configurations.
BGP characteristics are a single these types of subject. You’ve obtained effectively-recognized required, very well-regarded discretionary, transitive, and non-transitive. Then you definately’ve received Just about every person BGP attribute to remember, as well as buy in which BGP considers characteristics, and what attributes even are… along with a lot much more! As with every other Cisco topic, we must stroll before we can run. Enable’s take a look at what attributes are and what they do in BGP.
BGP characteristics are very similar to what metrics are to OSPF, RIP, IGRP, and EIGRP. You won’t see them mentioned inside a routing table, but attributes are what BGP considers When selecting the most effective route to your place when many valid (loop-cost-free) paths exist.
When BGP has to make a decision among these paths, There is certainly an get wherein BGP considers The trail attributes. For achievement within the CCNP exams, you have to know this order. BGP appears to be like at route characteristics With this get:
Optimum excess weight (Cisco-proprietary BGP price)
Optimum community desire (LOCAL_PREF)
Choose domestically originated route.
Shortest AS_PATH is most well-liked.
Decide on route with cheapest origin code. Interior paths are favored in excess of exterior paths, and exterior paths are chosen about paths with the origin of “incomplete”.
Cheapest multi-exit discriminator (MED)
Exterior BGP routes preferred over Inner BGP routes.
If no exterior https://www.washingtonpost.com/newssearch/?query=토토사이트 route, pick path with most affordable IGP Price tag to the subsequent-hop router for iBGP.
Opt for newest route.
Pick out least expensive BGP RID (Router ID).
In the event you don’t know what these values are, or how they’re configured, don’t panic! The next various aspects of this BGP tutorial will explain everything. So invest some time learning this purchase, and in part II of the no cost BGP tutorial, we’ll check out Every of such values intimately. Maintain learning!