The gr-0/0/0.0 interface on your Junos device has a link state of up/up and you have correctly added static routes to reach the remote subnets. However, you are not seeing traffic pass over the tunnel. What might be causing the issue?
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A. B. C. D.D
For proper tunnel operation, the intermediary devices, located in the forwarding path between the tunnel endpoints, must be able to route to each of the tunnel endpoints.
Based on the provided scenario, the gr-0/0/0.0 interface is up/up, and static routes have been correctly configured to reach the remote subnets. However, traffic is not passing over the tunnel, and there could be several reasons for this issue.
A. The tunnel interfaces are disabled: If the tunnel interfaces are disabled, no traffic will be passed over the tunnel. This could be because the tunnel interfaces have been shut down or not configured correctly. To resolve this issue, you should check the configuration of the tunnel interfaces and make sure that they are enabled and properly configured.
B. You have not configured keepalives on the endpoints: Keepalives are messages sent between the endpoints of a tunnel to ensure that the tunnel remains up and active. If keepalives are not configured, the tunnel could be going down intermittently, resulting in traffic not passing over the tunnel. To resolve this issue, you should configure keepalives on both endpoints of the tunnel.
C. The endpoints do not have valid routes to the remote tunnel endpoints: If the endpoints of the tunnel do not have valid routes to the remote tunnel endpoints, the traffic will not be passed over the tunnel. To resolve this issue, you should check the routing tables of the endpoints and make sure that they have valid routes to the remote tunnel endpoints.
D. The intermediary devices do not have valid routes to the route tunnel endpoints: If the intermediary devices between the endpoints of the tunnel do not have valid routes to the remote tunnel endpoints, the traffic will not be passed over the tunnel. To resolve this issue, you should check the routing tables of the intermediary devices and make sure that they have valid routes to the remote tunnel endpoints.
In summary, the issue of traffic not passing over the tunnel could be caused by various factors, including disabled tunnel interfaces, absence of keepalives, lack of valid routes on endpoints or intermediary devices. Therefore, you should perform a thorough check of all these factors to identify and resolve the root cause of the issue.