Multiple sets of BGP routing policies can map down to the same Stable Paths Problem : DISAGREE in RPSL (Version I)

1 2 0

1 0

2 1 0

2 0

import : from AS1 action pref = 0; accept ANY;

from AS0 action pref = 10; accept ANY;

export : to AS2 announce ANY;

import : from AS2 action pref = 0; accept ANY;

from AS0 action pref = 10; accept ANY;

export : to AS1 announce ANY;

export : to AS1, AS2 announce AS0;