I'm trying to achieve this: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13762-40.html#conf3. The only difference here is that I am being sent the full BGP routing table.

I have following questions:

  1. If the upstream is sending full BGP table instead of a default route, will the setup and logic described on that page work?
  2. Should I ask just for a default route?
  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can post your own answer and accept it.
    – Ron Maupin
    Jan 7 '21 at 22:54
  1. Yes it will work in the same way. BGP prefers external to internal routes.

  2. Probably. It you are only connected to a single provider, there's no advantage to full routes. Full routes make sense when you can choose among several providers.

  1. A default route is just a single route. If you receive the full BGP routing table, you just have many routes instead of one. The same logic applies to each individual route as it would for a single, default route.
  2. You could just ask for a default route if you really have no need for the full BGP routes. You could also set your routers up to ignore the incoming BGP routes and supply your own default route. You need to decide that based on whether or not one router really does have a better route to specific networks, and you want to take advantage of that.
  • You apparently type faster than me ;)
    – Ron Trunk
    Oct 28 '15 at 18:02
  • Actually, your answer popped before I was done.
    – Ron Maupin
    Oct 28 '15 at 18:02

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