[c-nsp] BGP partial routes and partial carrier failures

[Bruce Pinsky]

On 10/2/2014 12:14 PM, Paul Wozney wrote:
> Someone on another forum suggested using IP SLA and EEM to react to network
> changes.  It's definitely an idea.
> 

How about not taking the default from them and set your own default based
on whatever criteria you chose.  You could, for instance, use Conditional
Advertisements to inject the default based on the presence or absence of
routing information from one or the other provider.  You could also use PfR
to select the outbound path based on availability/performance/cost.

As is normally the case with Cisco, there are any number of ways to skin
this cat, but the key is not taking default from the providers since you
can't trust them.  Taking full routes achieves the same thing (by getting
rid of default), but you can solve this issue without the additional memory
load and potentially cost.

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bep