[j-nsp] conditions [and negation] in bgp import policies

[Daniel Verlouw]

Hi,

On Thu, Aug 18, 2016 at 4:45 PM, Michael Hare <michael.hare at wisc.edu> wrote:
> Anyone have experience using conditions in bgp import policies?

condition match condition can only be used in BGP export policies, not
on import.

You could do something like the following:

aggregate {
 route 0/0 {
   discard;
   policy 0/0-CONTRIBUTORS;
 }
}

policy-statement 0/0-CONTRIBUTORS {
 term google-dns {
  from route-filter 8.8.8.0/24 exact;
  then accept;
 }
 term reject-everything-else {
  then reject;
 }
}

This will make the aggregate discard route active when the Google
prefix is present. If it disappears, the aggregate will lose its
contributing route and become hidden, making the BGP-received default
route active.

   --Daniel.