Whenever you’re getting ready to go the BSCI Test and make your CCNP certification, amongst the largest worries is learning BGP. BGP is completely diverse from any protocol you figured out to make your CCNA certification, and on the list of distinctions is BGP takes advantage of route attributes to favor one particular path about A further when many paths to or from a location exist.
See I reported “to or from”. In previously absolutely free BGP tutorials, I reviewed the BGP attributes “pounds” and “nearby desire”. These characteristics are utilized to favor a person route to some destination more than another; for example, if BGP AS one hundred has two paths to a destination in AS 200, these two characteristics is usually set in AS a hundred to favor a single path above One more. But 토토먹튀 Imagine if AS one hundred wants to inform the routers in AS 200 concerning which path it should really use to reach a specified destination in AS a hundred?
That’s in which the BGP attribute “Multi-Exit Discriminator”, or MED, comes in. The MED value is usually established in AS one hundred to tell AS two hundred which route it ought to use to achieve a given community in AS a hundred.
Just like quite a few BGP attributes, the MED might be set that has a route-map. What you must observe is that there is no “set med” price in route maps. To change the MED of the route, you'll want to change the metric of that path. Let’s say that there are two entry paths for AS 200 to implement to achieve Places in http://query.nytimes.com/search/sitesearch/?action=click&contentCollection®ion=TopBar&WT.nav=searchWidget&module=SearchSubmit&pgtype=Homepage#/먹튀검증 AS one hundred. You'd like AS 200 to make use of the a hundred.one.one.0/24 route around the 100.two.two.0/24 path. Very first, establish the two paths with two separate ACLs.
R1(config)#accessibility-list 22 permit one hundred.1.one.0 0.0.0.255
R1(config)#entry-list 23 allow one hundred.2.2.0 0.0.0.255
Next, publish a route-map that assigns a lessen metric to the more-attractive path.
R1(config)#route-map PREFER_PATH allow 10
R1(config-route-map)#match ip deal with 22
R1(config-route-map)#established metric one hundred
R1(config-route-map)#route-map PREFER_PATH permit twenty
R1(config-route-map)#match ip tackle 23
R1(config-route-map)#set metric 250
Finally, utilize the route-map towards the neighbor or neighbors.
R1(config-route-map)#router bgp a hundred
R1(config-router)#neighbor 22.two.two.two route-map PREFER_PATH out
The real key details to keep in mind is though several BGP attributes prefer the next worth, the MED is essentially an exterior metric – and also a decreased metric is most well-liked, equally as Together with the protocols you’ve presently studied to get paid your CCNA certification.