[CAUSE] The tmnxVRtrDnsFault notification is generated when this system detects a fault with a DNS server, or when it detects that the fault has disappeared. The virtual router instance and DNS server address are indicated with vRtrID, vRtrNotifInetAddrType, and vRtrNotifInetAddr. More details of the fault may be indicated with vRtrFailureDescription. [EFFECT] If another DNS server is available in the same virtual router instance, that DNS server may be used instead. Otherwise, any application in this virtual router instance that relies on DNS may be affected. [RECOVERY] A modification of the conceptual row in the vRtrDnsTable with the same value for vRtrID, may repair the problem.