young19918 Can you provide the rest of the associated configuration for this IPsec VPN? From my understanding the following is all that should be configured, assuming you have done all the prerequisits such as a self-IP.
1. Create a forwarding virtual server for IPsec. This should listen on destination 0.0.0.0/0, all ports, all protocols, and all vlans and tunnels
2. Create an IKE peer
3. Create an IPsec policy
4. Create an IPsec traffic selector. Make sure this one is above the default.
The following article might help you in this configuration.
https://techdocs.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/bigip-tmos-tunnels-ipsec-13-0-0/10.html