The tunnel interface is down due to recursive routing.

[Sanjib Pradhan]

Dear Friends,

Please explain me in details.

Tunnel interface is down due to recursive routing because tunnel destination IP learned by Tunnel interface itself. But I  do not understand Why It is getting down after learned the tunnel destination IP address. Please explain in details>

Gateway of last resort is not set

     1.0.0.0/24 is subnetted, 1 subnets

C       1.1.1.0 is directly connected, Loopback1

     2.0.0.0/24 is subnetted, 1 subnets

R       2.2.2.0 [120/1] via 192.168.1.2, 00:00:05, Tunnel1

     20.0.0.0/24 is subnetted, 1 subnets

R  20.1.1.0 [120/1] via 192.168.1.2, 00:00:05, Tunnel1

                 [120/1] via 10.1.1.2, 00:00:18, FastEthernet0/0

     10.0.0.0/24 is subnetted, 1 subnets

C       10.1.1.0 is directly connected, FastEthernet0/0

C    192.168.1.0/24 is directly connected, Tunnel1

*Mar  1 00:21:53.051: %TUN-5-RECURDOWN: Tunnel1 temporarily disabled due to recursive routing

*Mar  1 00:21:54.051: %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel1, changed state to down

Regards,

Sanjib

[paul driver]

Hello

To.establish the tunnel it requires a source and destination.address to be reachable via the physical links learnt via either static or dynamic routing process. (igp)

When your tunnel is established its source and destination address should not be advertised over.these tunnel interfaces - as these tunnels are only virtual interfaces created to run.over the physical.path

So if these tunnels see a better preffered path over it.virtual link for its destination addresses lt would result in the error you are.receiving.

Res
Paul

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