nanog mailing list archives

Re: Default routes on BGP routers with full feeds


From: Jared Mauch <jared () puck nether net>
Date: Tue, 4 Nov 2014 16:31:50 -0500


On Nov 4, 2014, at 1:25 PM, Mike Walter <mwalter () 3z net> wrote:

I have 5 providers and we get the default from all of them and full routing tables.

I have seen cases where if there is no default route, the traffic didn't know where to go, even with full routes from 
all my providers.  

We put some efforts into our default origination service a few years back to prevent default from being announced if 
the pop became isolated for some catastrophic reason.  I recall once when someone upgraded the route processor of two 
different routers in a pop at the same time resulting in isolation until the configs were placed on the new RE for 
other devices in the site.  Things happen and preparing for them is the first step to survive.

- Jared



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