DMVPN - nhrp map and nhs command syntax
When configuring DMVPN on a Cisco IOS router, there are several tunnel commands that are issued on the hub and spoke devices that can use differing syntaxes. For example, consider the following configuration excerpt from a spoke router:
ip nhrp map 192.168.0.1 200.0.0.1 ip nhrp map multicast 200.0.0.1 ip nhrp nhs 192.168.0.1
These commands can be completely replaced with the following single command:
ip nhrp nhs 192.168.0.1 nbma 200.0.0.1 multicast
This is because since IOS 15.1(2)T and later, the ip nhrp nhs command has been expanded to support additional parameters.
Links:
https://forum.networklessons.com/t/introduction-to-dmvpn/1300/68?u=lagapides
https://networklessons.com/cisco/ccie-routing-switching/dmvpn-phase-1-basic-configuration