When you’re preparing to go the BSCI Examination and gain your CCNP certification, among the largest issues is Understanding BGP. BGP is totally different from any protocol you realized to receive your CCNA certification, and one of many discrepancies is always that BGP works by using route attributes to favor one particular route in excess of A different when multiple paths to or from the location exist.
See I mentioned https://en.search.wordpress.com/?src=organic&q=토토사이트 “to or from”. In earlier absolutely free BGP tutorials, I talked about the BGP attributes “excess weight” and “local preference”. These attributes are used to favor a single path into a vacation spot more than Yet another; one example is, if BGP AS a hundred has two paths to a spot in AS 200, both of these characteristics might be set in AS 100 to favor one particular path above An additional. But Let's say AS a hundred needs to inform the routers in AS two hundred concerning which route it must use to succeed in a offered spot in AS 100?
That’s exactly where the BGP attribute “Multi-Exit Discriminator”, or MED, comes in. The MED value could be established in AS 100 to inform AS 200 which route it ought to use to achieve a presented community in AS a hundred.
As with many BGP attributes, the MED can be established that has a route-map. What you'll want to view is that there's no “set med” benefit in route maps. To change the MED of a route, you must change the metric of that path. Enable’s say 사설토토 that there are two entry paths for AS 200 to make use of to achieve Locations in AS a hundred. You wish AS 200 to make use of the 100.1.1.0/24 path around the a hundred.2.2.0/24 route. Initial, establish The 2 paths with two different ACLs.
R1(config)#accessibility-list 22 allow a hundred.one.1.0 0.0.0.255
R1(config)#entry-record 23 allow one hundred.2.two.0 0.0.0.255
Following, publish a route-map that assigns a decrease metric to the greater-fascinating path.
R1(config)#route-map PREFER_PATH permit 10
R1(config-route-map)#match ip address 22
R1(config-route-map)#set metric 100
R1(config-route-map)#route-map PREFER_PATH permit 20
R1(config-route-map)#match ip handle 23
R1(config-route-map)#set metric 250
Lastly, use the route-map into the neighbor or neighbors.
R1(config-route-map)#router bgp 100
R1(config-router)#neighbor 22.2.2.2 route-map PREFER_PATH out
The main element points to bear in mind is always that although numerous BGP characteristics want an increased price, the MED is basically an exterior metric – as well as a lower metric is chosen, just as with the protocols you’ve now researched to generate your CCNA certification.
