This TruthValue object, when true, allows the VPN service provider's virtual router to override this VRF's own autonomous system number with the provider's ASN in advertised routes. It's typically used together with the site-of-origin option to prevent routing loops in customer networks that reuse the same AS number across multiple sites. For instance, a provider serving a customer whose sites all use the same private ASN might enable AS override on the VRF to keep those sites' route advertisements from being mistaken for loops.