Mike Bushard, Jr wrote:
My question is with this type of thing happening, what would be the best way
to obtain bandwidth? Get multiple tier 1's, or a mix of tier 1's and tier
2's, or multiple tier 2's?
It all really depends on which carriers you are referring to. However,
based on what we are seeing BGP is no longer enough to ensure
connectivity. For various technical and political reasons you will
receive blackholed routes via BGP. Here is a list of the blackholes we
have seen so far today.
122.167.59.0/24
202.56.230.0/24
209.247.23.0/24
206.204.52.0/24
209.244.1.0/24
64.152.2.0/24
63.209.170.0/24
64.152.59.0/24
209.244.7.0/24
216.115.31.0/24
204.13.160.0/24
76.112.173.0/24
63.240.249.0/24
198.8.3.0/24
65.90.124.0/24
Most of these are caused by flap dampening, but nevertheless the happen
every day. If you receive these routes via BGP from all your carriers
how do you know which upstream to take that will actually get you there?
You have to being monitoring for these types of problems and adjust your
local preference on these routes to the correct upstream. Do you want to
do that by hand?
-Matt
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