August 2000
Intermediate to advanced
528 pages
12h 44m
English
Content preview from Internet Routing Architectures, Second Edition
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Frequently Asked Questions
Q— I am not running IBGP between my border routers. Do I need to worry about routing loops?
A— As far as the interaction between IGP and BGP, loops cannot occur. If your internal routers are following a default toward the BGP border routers, after the traffic reaches the border router, it has only one way out via the EBGP session.
Q— I have two BGP border routers running IBGP and connected via a serial link. I am using local preference to control my exit points. What happens if the serial line goes down?
A— If you are setting BGP policies that cause traffic to be directed between BGP border routers, this would be the same scenario as if you did not have a link between the border routers. While the serial line is down, ...
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