JOIN NPM_RoutingProtocol on NPM_RoutingNeighbor_V.ProtocolID = NPM_RoutingProtocol.ProtocolID
WHERE NPM_RoutingNeighbor_V.ProtocolID = 14 AND NPM_RoutingNeighbor_V.DisplayName <> 'Established'
The JOIN statement can safely be removed from your query.
EDIT:
When I say "JOIN statement, I meant the whole JOIN line:
JOIN NPM_RoutingProtocol on NPM_RoutingNeighbor_V.ProtocolID = NPM_RoutingProtocol.ProtocolID