5.10. BGP advertisement policy. Suppose that a network that is a customer of two different provider networks will not relay traffic between its two provider networks. How can a customer network such as x in the figure below implement that policy. provider network legend: customer network: O x will only advertise a route to itself to one of its provider networks B or C, but not both. O x will not advertise to provider networks B or C that it has a path to the other provider network O Provider networks B and C will learn from the EBGP protocol that both have a direct path to x but will agree to not send traffic to each other via x, since x is a customer network. O Since x is a customer network (and because a customer network has autonomy to do as it pleases), it will explicitly inform each provider network that it will not relay traffic to the other provider network.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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QUESTION 2
5.10. BGP advertisement policy. Suppose that a network that is a customer of two different provider networks will not relay traffic between its two
provider networks. How can a customer network such as x in the figure below implement that policy.
provider
network
legend:
customer
network:
O x will only advertise a route to itself to one of its provider networks B or C, but not both.
O x will not advertise to provider networks B or C that it has a path to the other provider network
O Provider networks B and C will learn from the eBGP protocol that both have a direct path to x but will agree to not send traffic to each other via x,
since x is a customer network.
O since x is a customer network (and because a customer network has autonomy to do as it pleases), it will explicitly inform each provider network
that it will not relay traffic to the other provider network.
Transcribed Image Text:QUESTION 2 5.10. BGP advertisement policy. Suppose that a network that is a customer of two different provider networks will not relay traffic between its two provider networks. How can a customer network such as x in the figure below implement that policy. provider network legend: customer network: O x will only advertise a route to itself to one of its provider networks B or C, but not both. O x will not advertise to provider networks B or C that it has a path to the other provider network O Provider networks B and C will learn from the eBGP protocol that both have a direct path to x but will agree to not send traffic to each other via x, since x is a customer network. O since x is a customer network (and because a customer network has autonomy to do as it pleases), it will explicitly inform each provider network that it will not relay traffic to the other provider network.
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