Once you’re making ready to pass the BSCI Test and make your CCNP certification, considered one of the biggest difficulties is Studying BGP. BGP is completely distinctive from any protocol you uncovered to generate your CCNA certification, and one of many differences is that BGP employs route characteristics to favor a person path above A further when multiple paths to or from the desired destination exist.
See I claimed “to or from”. In previously free of charge BGP tutorials, I reviewed the BGP characteristics “pounds” and “local choice”. These attributes are used to favor one route to the desired destination in excess of another; for example, if BGP AS a hundred has two paths to some location in AS two hundred, these two characteristics is usually established in AS 100 to favor one path around A further. But Imagine if AS a hundred desires to tell the routers in AS 200 concerning which route it should use to reach a presented location in AS a hundred?
That’s the place the BGP attribute “Multi-Exit Discriminator”, or MED, comes in. The MED https://www.washingtonpost.com/newssearch/?query=토토사이트 worth can be established in AS a hundred to tell AS 200 which route it must use to achieve a presented network in AS a hundred.
Just like several BGP characteristics, the MED might be established that has a route-map. What you'll want to observe is that there is no “set med” value in route maps. To change the MED of the path, you have to alter the metric of that route. Permit’s say that there are two entry paths for AS 200 to utilize to succeed in Locations in AS a hundred. You need AS 200 to use the one hundred.1.one.0/24 path about the one hundred.two.two.0/24 path. Initial, recognize The 2 paths with two individual ACLs.
R1(config)#obtain-list 22 allow one hundred.one.one.0 0.0.0.255
R1(config)#accessibility-checklist 23 permit a hundred.two.two.0 0.0.0.255
Up coming, create a route-map that assigns a reduced metric to the more-attractive path.
R1(config)#route-map PREFER_PATH permit 스포츠토토 ten
R1(config-route-map)#match ip tackle 22
R1(config-route-map)#set metric 100
R1(config-route-map)#route-map PREFER_PATH allow twenty
R1(config-route-map)#match ip deal with 23
R1(config-route-map)#established metric 250
Finally, use the route-map to your neighbor or neighbors.
R1(config-route-map)#router bgp one hundred
R1(config-router)#neighbor 22.2.2.two route-map PREFER_PATH out
The key points to remember is that though quite a few BGP characteristics want a greater worth, the MED is largely an exterior metric – along with a reduced metric is preferred, just as Together with the protocols you’ve currently researched to get paid your CCNA certification.