May be  "NAT Traversal is a feature that is auto detected by VPN devices."crypto ipsec nat-transparency udp-encapsulation https://www.cisco.com/en/US/docs/ios-xml/ios/sec_conn_dplane/configuration/15-2mt/sec-ipsec-nat-transp.html#GUID-E22B358E-FDE7-4...

outside equipment (router/Firewall) should static map a public IP address to ASA outside interface (ip address 134.0.x.x 255.255.255.252)

! from attachment cfg, one L2L VPN IKEV1 connection! checking the follow ??! too many phase1, I have configurated "crypto ikev1 policy 10" only! "route inside 172.16.80.0 255.255.255.0 172.16.80.1 1"! Is 172.16.80.0 direct connect ??! inside host 172...

complicate solutionASA: Multi-Context Mode Remote-Access (AnyConnect) VPNone context for SSL VPN AnyConnectOne context for normal traffichttps://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-firewalls/200353-ASA-Multi-Context-Mode-Rem...

check clicrypto isakmp nat-traversal natkeepaliveThe ASA supports multiple IPsec peers behind a single NAT/PAT device operating in LAN-to-LAN or remote access networks , but not both.NAT traversal (NAT-T) is a feature that allows IPsec traffic to “tr...