Failure cases
BGPDNS server does not respond
- If the DNS server does not receive answers for some time it should mark the BGPDNS server as defektive and answer with random sorting
Loss of all BGP sessions
- If the BGPDNS looses all BGP session it will simply answer all requests without any preference set
Network not in table
- If the network prefix of the end-user is not in the BGP routing-table it will simply answer without any preference set