BGP is One of the more complicated topics you’ll research when pursuing your CCNP, if not by far the most complicated. I am aware from own knowledge that when I was earning my CCNP, BGP is the topic that gave me quite possibly the most hassle at the beginning. Something I maintain reminding currently’s CCNP candidates about, however, is usually that no Cisco technological innovation is unachievable to know if you only break it down and fully grasp the basics Before you begin striving to understand the more complex configurations.
BGP characteristics are just one these kinds of subject matter. You’ve received perfectly-known mandatory, perfectly-regarded discretionary, transitive, and non-transitive. Then you definately’ve got Every person BGP attribute to recall, plus the order wherein BGP considers characteristics, and what attributes even are… and also a great deal much more! As with any other Cisco topic, we really need to walk just before we will run. Allow’s Examine what attributes are and what they do in BGP.
BGP characteristics are much like what metrics are to OSPF, RIP, IGRP, and EIGRP. You won’t see them listed inside a routing table, but characteristics are what BGP considers When selecting the most beneficial route to a destination when several legitimate (loop-no cost) paths exist.
When BGP has to choose involving these kinds of paths, There is certainly an buy by which BGP http://www.bbc.co.uk/search?q=토토사이트 considers the path characteristics. For achievement over the CCNP tests, you have to know this buy. BGP seems at path attributes in this buy:
Highest body weight (Cisco-proprietary BGP price)
Maximum local desire (LOCAL_PREF)
Choose domestically originated route.
Shortest AS_PATH is favored.
Select route with lowest origin code. Internal paths are most popular more than external paths, and exterior paths are preferred about paths by having an origin of “incomplete”.
Most affordable multi-exit discriminator (MED)
Exterior BGP routes most well-liked over Inside BGP routes.
If no exterior route, select path with most affordable IGP cost to the next-hop router for iBGP.
Pick most up-to-date route.
Pick out most affordable 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 many portions of this BGP tutorial will explain everything. So spend 메이저사이트 some time learning this buy, and partially II of the absolutely free BGP tutorial, we’ll look at Each and every of such values intimately. Retain researching!