BGP is The most sophisticated matters you’ll analyze when pursuing your CCNP, if not probably the most intricate. I do know from particular encounter that After i was earning my CCNP, BGP is The subject that gave me probably the most issues initially. Another thing I keep reminding nowadays’s CCNP candidates about, even though, is always that no Cisco technological know-how is impossible to be aware of if you simply split it down and understand the basics Before you begin seeking to understand the greater complicated configurations.
BGP characteristics are just one this sort of topic. You’ve obtained nicely-recognized necessary, well-acknowledged discretionary, transitive, and non-transitive. You then’ve got Every single unique BGP attribute to remember, and the order wherein BGP considers characteristics, and what characteristics even are… in addition to a whole lot a lot more! As with every other Cisco matter, we need to stroll before we are able to operate. Permit’s Examine what characteristics are and the things they do in BGP.
BGP attributes are very similar to what metrics are to OSPF, RIP, IGRP, and EIGRP. You gained’t see them listed inside a routing desk, but attributes are what BGP considers When picking the top path to your place when many valid (loop-free) paths exist.
When BGP has to make your mind up concerning such paths, There's an get by which BGP considers the path attributes. For fulfillment within the CCNP examinations, you have to know this order. BGP appears at path characteristics With this purchase:
Highest fat (Cisco-proprietary BGP price)
Optimum area choice (LOCAL_PREF)
Like regionally originated route.
Shortest AS_PATH is most popular.
Pick out route with lowest origin code. Interior paths are most popular in excess of external paths, and external paths are favored about paths by having an origin of “incomplete”.
Most affordable multi-exit discriminator (MED)
Exterior 먹튀검증 BGP routes preferred over Interior BGP routes.
If no exterior route, pick out route with most affordable IGP Expense to the subsequent-hop router for iBGP.
Select most recent route.
Pick out most affordable BGP RID (Router ID).
In case you don’t know very well what these values are, or how they’re configured, don’t stress! The following quite a few areas of this BGP tutorial will clarify http://edition.cnn.com/search/?text=먹튀검증 all of it. So invest some time learning this order, and partly II of the free of charge BGP tutorial, we’ll look at Each individual of such values in detail. Maintain finding out!