BGP is Probably the most advanced subjects you’ll study when pursuing your CCNP, if not quite possibly the most sophisticated. I know from personalized experience that After i was earning my CCNP, BGP is The subject that gave me by far the most trouble in the beginning. One thing I hold reminding nowadays’s CCNP candidates about, however, is the fact 안전놀이터 no Cisco technologies is impossible to be familiar with if you simply break it down and comprehend the basic principles before you start making an attempt to understand the more elaborate configurations.
BGP attributes are one particular this kind of matter. You’ve bought effectively-acknowledged mandatory, properly-identified discretionary, transitive, and non-transitive. You then’ve bought Every single particular person BGP attribute to remember, along with the order where BGP considers characteristics, and what characteristics even are… and a whole lot a lot more! As with any other Cisco subject matter, we really have to walk right before we are able to run. Permit’s Look into what attributes 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 within a routing table, but characteristics are what BGP considers When selecting the very best route to your destination when various valid (loop-free) paths exist.
When BGP has to decide concerning these paths, There is certainly an order where BGP considers The trail attributes. For success to the CCNP tests, you need to know this buy. BGP appears to be at path characteristics With this get:
Maximum weight (Cisco-proprietary BGP benefit)
Best neighborhood preference (LOCAL_PREF)
Want domestically originated route.
Shortest AS_PATH is chosen.
Pick route with cheapest origin code. Inner paths are most well-liked over exterior paths, and exterior paths are preferred in excess of paths having an origin of “incomplete”.
Lowest multi-exit discriminator (MED)
Exterior BGP routes favored about Interior BGP routes.
If no exterior https://www.washingtonpost.com/newssearch/?query=토토사이트 route, select route with cheapest IGP Price to the subsequent-hop router for iBGP.
Choose newest route.
Pick out lowest BGP RID (Router ID).
In the event you don’t understand what these values are, or how they’re configured, don’t panic! The following numerous areas of this BGP tutorial will reveal it all. So invest some time finding out this get, and in part II of the cost-free BGP tutorial, we’ll check out Each individual of those values intimately. Hold studying!