These are flashcards an notes made by students on topics like 'bgp', 'route' and 'routing', originating from:

- Narbik Kocharians, et al
ISBN-10 0133591069 ISBN-13 9780133591064
717 Flashcards & Notes
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Study Cards on bgp, route, routing

What are the two requirements for adding iBGP to the routing table?
-The route must be the best BGP route
-The route must be the best route (according to AD) in comparison with other routing sources
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How can you overcome the blackhole with BGP?
-Use sync and redistribute routes
-Disable sync and use bgp on all routers in an AS
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What is the BGP synchronization rule?
The BGP synchronization rule states that if an AS provides transit service to another AS, BGP should not advertise a route until all of the routers within the AS have learned about the route via an IGP
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What BGP command can prevent problems related to IP routing and what will the command do?
synchronization
BGP routes will be redistributed in the routing protocol
Explanation: https://learningnetwork.cisco.com/thread/27562
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What is the disadvantage of disabling sync and using BGP on all routers in an AS?
-BGP needs the full mesh of iBGP peers inside an AS because BGP does not advertise iBGP routes (N routers, N(N-1/2 neighbor connections required)
-BGP can degrade because of the large number of peers
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What does BGP offer to reduce the number of peer connections inside an AS?
-Confederations
-Route-reflectors
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