I want to make sure how many Backup NHSs we can setup on spoke in one Tunnel when we refer to below doc.
From what I take through so far, there is no good value for this max value.
Chapter: DMVPN-Tunnel Health Monitoring and Recovery Backup NHS
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_conn_dmvpn/configuration/15-mt/sec-conn-dmvpn-15-mt-book/sec-conn-dmvpn-backup-nhs.html#GUID-5735691F-C2E1-4585-AD35-CF9D31132BF6
[Example Configuring Maximum Connections for an NHS Cluster]
interface tunnel 0
bandwidth 1000
ip address 10.0.0.1 255.0.0.0
no ip redirects
ip mtu 1400
ip nhrp authentication test
ip nhrp map multicast 172.0.2.1
ip nhrp map 10.0.0.253 172.0.2.1
ip nhrp map multicast 172.0.2.2
ip nhrp map 10.0.0.251 172.0.2.2
ip nhrp map multicast 172.0.2.3
ip nhrp map 10.0.0.252 172.0.2.3
ip nhrp network-id 100000
ip nhrp holdtime 300
ip nhrp nhs 10.0.0.252 priority 2
ip nhrp nhs 10.0.0.251 priority 1
ip nhrp nhs 10.0.0.253 priority 3 <<< How many "ip nhrp nhs" we can set in one Tunnel.
ip nhrp nhs cluster 0 max-connections 3
