BGP is one of the most advanced subjects you’ll research when pursuing your CCNP, Otherwise by far the most complicated. I understand from private expertise that Once i was earning my CCNP, BGP is the topic that gave me the most trouble to start with. Another thing I hold reminding currently’s CCNP candidates about, although, is that no Cisco technologies is impossible to understand https://www.washingtonpost.com/newssearch/?query=먹튀검증 if you merely split it down and recognize the fundamentals before you start striving to be familiar with the greater elaborate configurations.
BGP attributes are one particular such topic. You’ve got nicely-regarded obligatory, very well-identified discretionary, transitive, and non-transitive. Then you’ve obtained Every single person BGP attribute to keep in mind, plus the purchase where BGP considers attributes, and what characteristics even are… along with a lot extra! As with any other Cisco matter, we must wander just before we can run. Permit’s Have a look at 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 received’t see them outlined in a very routing table, but attributes are what BGP considers When picking the most effective route to the vacation spot when numerous valid (loop-no cost) paths exist.
When BGP has to come to a decision concerning these paths, There may be an order where BGP considers The trail characteristics. For success about the CCNP tests, you need to know this purchase. BGP seems at 토토사이트 route characteristics In this particular get:
Highest body weight (Cisco-proprietary BGP value)
Best area preference (LOCAL_PREF)
Prefer regionally originated route.
Shortest AS_PATH is desired.
Opt for route with lowest origin code. Internal paths are favored more than external paths, and external paths are desired over paths having an origin of “incomplete”.
Least expensive multi-exit discriminator (MED)
Exterior BGP routes most well-liked above Interior BGP routes.
If no exterior route, pick out path with least expensive IGP Charge to the following-hop router for iBGP.
Opt for most recent route.
Select cheapest BGP RID (Router ID).
If you don’t really know what these values are, or how they’re configured, don’t worry! Another quite a few portions of this BGP tutorial will reveal all of it. So invest some time finding out this order, and in part II of the free BGP tutorial, we’ll check out each of those values intimately. Continue to keep researching!