The hard part is ensuring that the BGP prefix has propagated to the
internet as a whole before you pull the static route and as a result the
ISP-sourced prefix - the best thing to do is to check looking glasses
(make sure you check several - some networks will not forward the "new"
route if the old one has a better metric) to ensure propagation of the new
route before you pull the static route.
Some? Which networks are propogating routes that they aren't using?
-- Brett
Some? Which networks are propogating routes that they aren't using?
There are boxes *able* to export routes, not *active* in the routing table
and that match an export policy.
In my experience there will always be some dampening,
flapping, etc.. No matter how perfect you perform this
operation there are always minor little things that go wrong
as well as updates that make it across the network
just a *little* faster than one expected.
As long as you "flap" once, you should not see any real
issues. There is always someone behind a slow router running bgp
and the network that has an overly aggressive dampening policy
that you will have issues with. But that will be such a small
subset of the internet that you are connected to (most likely)
that there will be no real visible problems.
at least none that don't go away in at most 5-10 mins.
- jared