ADTRAN AOS Version R10.1.0 Command Reference Manual page 939

Command Reference Guide Global Configuration Mode Command Set
VRF on AOS products allows a single physical router to be partitioned into multiple virtual routers. Each
router instance has its own route table and interface assignments. Beginning with Release 16.1, all AOS
routers supporting multiple VRF instances (multi-VRF) have an unnamed default VRF instance regardless
of whether multi-VRF is configured. Therefore, executing the abovementioned commands without
specifying a VRF will only affect the default unnamed VRF.
DNS failover allows the AOS unit to respond to a DNS request if the unit cannot reach the configured DNS
server and the entry exists in the unit's DNS table as a preserved value. DNS failover is typically used with
the Voice of Internet Protocol (VoIP) name-server caching feature.
Usage Examples
The following example enables DNS proxy on the default VRF (router):
(config)#domain-proxy
60000CRG0-35E Copyright © 2012 ADTRAN, Inc. 939