Whenever you’re making ready to pass the BSCI Examination and get paid your CCNP certification, certainly one of the largest problems is Understanding BGP. BGP is completely unique from any protocol you acquired to receive your CCNA certification, and one of several discrepancies is that BGP uses route attributes to favor just one path about another when many paths to or from a location exist.
Discover I claimed “to or from”. In earlier cost-free BGP tutorials, I talked over the BGP characteristics “body weight” and “area desire”. These attributes are accustomed to favor one route to some 사설토토 destination in excess of An additional; such as, if BGP AS a hundred has two paths to some vacation spot in AS two hundred, both of these characteristics is often set in AS a hundred to favor one path above A different. But Let's say AS 100 would like to inform the routers in AS two hundred as to which route it really should use to reach a given spot in AS a hundred?
That’s the place the BGP attribute “Multi-Exit Discriminator”, or MED, comes in. The MED benefit can be established in AS a hundred to tell AS two hundred which path it should https://en.search.wordpress.com/?src=organic&q=토토사이트 really use to succeed in a supplied community in AS 100.
As with quite a few BGP characteristics, the MED is often established that has a route-map. What you have to observe is that there is no “set med” value in route maps. To change the MED of a route, you have to change the metric of that route. Allow’s say there are two entry paths for AS two hundred to employ to achieve Places in AS 100. You want AS 200 to utilize the a hundred.one.one.0/24 path around the one hundred.2.two.0/24 path. First, determine the two paths with two individual ACLs.
R1(config)#entry-list 22 permit a hundred.one.one.0 0.0.0.255
R1(config)#accessibility-record 23 permit a hundred.two.two.0 0.0.0.255
Upcoming, write a route-map that assigns a reduce metric to the greater-attractive path.
R1(config)#route-map PREFER_PATH allow 10
R1(config-route-map)#match ip address 22
R1(config-route-map)#established metric a hundred
R1(config-route-map)#route-map PREFER_PATH permit twenty
R1(config-route-map)#match ip deal with 23
R1(config-route-map)#established metric 250
At last, utilize the route-map into the neighbor or neighbors.
R1(config-route-map)#router bgp 100
R1(config-router)#neighbor 22.two.2.2 route-map PREFER_PATH out
The real key details to keep in mind is that although a lot of BGP attributes want a greater benefit, the MED is largely an exterior metric – along with a reduced metric is favored, equally as With all the protocols you’ve previously analyzed to get paid your CCNA certification.