Once you’re making https://www.trendpan.com/v1/contact.php/ ready to move the BSCI exam and make your CCNP certification, one of the largest worries is Studying BGP. BGP is completely diverse from any protocol you discovered to generate your CCNA certification, and among the distinctions is that BGP makes use of route attributes to favor one particular route around One more when multiple paths to or from the location exist.
See I reported “to or from”. In previously absolutely free BGP tutorials, I talked about the BGP characteristics “bodyweight” and “neighborhood preference”. These characteristics are accustomed to favor just one path to the location in excess of another; for http://edition.cnn.com/search/?text=토토사이트 example, if BGP AS a hundred has two paths to your destination in AS 200, these two attributes is often established in AS a hundred to favor one route in excess of Yet another. But Let's say AS one hundred wishes to inform the routers in AS 200 as to which path it should use to succeed in a specified desired destination in AS 100?
That’s the place the BGP attribute “Multi-Exit Discriminator”, or MED, is available in. The MED benefit could be set in AS 100 to tell AS two hundred which route it should use to reach a offered community in AS one hundred.
Just like many BGP characteristics, the MED might be set which has a route-map. What you'll want to observe is that there is no “set med” worth in route maps. To alter the MED of the path, you'll want to alter the metric of that path. Permit’s say that there are two entry paths for AS 200 to implement to achieve Places in AS 100. You desire AS two hundred to use the a hundred.one.1.0/24 path about the 100.two.two.0/24 path. Initial, determine The 2 paths with two separate ACLs.
R1(config)#accessibility-list 22 permit one hundred.one.one.0 0.0.0.255
R1(config)#accessibility-record 23 allow one hundred.2.two.0 0.0.0.255
Subsequent, produce a route-map that assigns a decreased metric to the greater-desirable route.
R1(config)#route-map PREFER_PATH permit 10
R1(config-route-map)#match ip tackle 22
R1(config-route-map)#established metric one hundred
R1(config-route-map)#route-map PREFER_PATH allow 20
R1(config-route-map)#match ip tackle 23
R1(config-route-map)#established metric 250
At last, use the route-map for the neighbor or neighbors.
R1(config-route-map)#router bgp a hundred
R1(config-router)#neighbor 22.two.two.2 route-map PREFER_PATH out
The crucial element factors to keep in mind is always that whilst lots of BGP attributes choose the next value, the MED is basically an exterior metric – plus a reduced metric is preferred, equally as Using the protocols you’ve presently studied to make your CCNA certification.