I have looked through documentation but can't seem to find a full call-home example config including DNS settings. I ran a search on the forums and found nothing. I was able to figure it out on an XR router. I have verified the traffic is allowed out through the firewall as part of the same object group the XR router was in.
This is what I have so far. I know on the XR device I added a static DNS entry for tools.cisco.com but I am not really sure if that was necessary. I don't have that in this config.
This is what I have so far, domain name and IP's omitted.
license smart enable
!
ip domain name vrf Mgmt-vrf [domain name]
!
license smart vrf Mgmt-vrf
!
ip name-server vrf Mgmt-vrf [IP]
!
ip domain lookup vrf Mgmt-vrf source-interface gigabitEthernet 0/0
!
ip http client source-interface gigabitEthernet 0/0
!
call-home
!
vrf Mgmt-vrf
!
source-interface GigabitEthernet 0/0
!
end
