NHRP encapsulation error

[o.elmohri]

I'm configuring a point to multipoint which is the following:

interface Tunnel1

ip address 10.0.0.2 255.255.255.0

no ip redirects

ip mtu 1440

ip hold-time eigrp 90 120

ip nhrp authentication <key>

ip nhrp map multicast <public ip>

ip nhrp network-id 1

ip nhrp nhs 10.0.0.1

tunnel source FastEthernet0/0

tunnel mode gre multipoint

tunnel key 0

end

And I'm getting the following error:

*Mar  1 01:40:47.695: NHRP: Setting retrans delay to 64 for nhs  dst 10.0.0.1

*Mar  1 01:40:47.695: NHRP: Attempting to send packet via DEST 10.0.0.1

*Mar  1 01:40:47.699: NHRP: Send Registration Request via Tunnel1 vrf 0, packet size: 83

*Mar  1 01:40:47.699:       src: 10.0.0.2, dst: 10.0.0.1

*Mar  1 01:40:47.699: NHRP: Encapsulation failed for destination 10.0.0.1 out Tunnel1

*Mar  1 01:41:37.751: NHRP: Setting retrans delay to 64 for nhs  dst 10.0.0.1

*Mar  1 01:41:37.755: NHRP: Attempting to send packet via DEST 10.0.0.1

*Mar  1 01:41:37.755: NHRP: Send Registration Request via Tunnel1 vrf 0, packet size: 83

*Mar  1 01:41:37.755:       src: 10.0.0.2, dst: 10.0.0.1

*Mar  1 01:41:37.759: NHRP: Encapsulation failed for destination 10.0.0.1 out Tunnel1

Any suggestion about this?

Regards,

[o.elmohri]

Hi,

I finaly did the sniffing on the spoke side.

But, all pings from that router can monitor a reply. And not the one through 10.0.0.1 (the hub tunnel side) unless the public IP of the hub can show a reply.

Any idea??

[ropakalns]

Just in case somebody else runs into the same problem. I resolved it with a shut/no shut on tunnel interfaces...

[ropakalns]

Also, try to check authentication key, because it will show you that something is wrong with authentication only if you enable debug nhrp packet