Frequently Asked Questions
Q— I statically defined a default toward my provider by pointing toward a network I am learning via BGP. What happens if that network goes up and down?
A— Your default will appear and disappear. That is why you should not point your default to a specific subnet. Always point to an aggregate or supernet, because they are less likely to flip-flop.
Q— I have the option of getting the 0/0 default via BGP or defining a static default. Which do you think is best?
A— For the border router, both methods are the same as long as the aggregate you are pointing to is stable. On the other hand, after you receive the 0/0 via BGP, it will get flooded to all your IBGP peers, and there is a chance that you will end up sending it to ...
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