no ip next-hop-self eigrp 90

https://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a008014bcd7.shtml

What is the purpose of " *no ip next-hop-self eigrp 90* " ? even if i remove
... still i got connectivity

*interface Tunnel0
ip address 192.168.1.1 255.255.255.0
no ip redirects
ip mtu 1440
ip nhrp authentication cisco123
ip nhrp map multicast dynamic
ip nhrp network-id 1
no ip split-horizon eigrp 90
no ip next-hop-self eigrp 90
tunnel source FastEthernet0/0
tunnel mode gre multipoint
tunnel key 0
tunnel protection ipsec profile cisco*

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Received on Sat Jul 31 2010 - 18:57:16 ART