Try this could be a help.
https://docs.fortinet.com/document/fortigate/7.4.5/cli-reference/158447704/config-firewall-ttl-policyconfig
firewall
ttl-policyhttps://community.fortinet.com/t5/FortiGate/Technical-Tip-Configuring-TTL-Security-Policy-for-BGP...
Fortinet SD-WAN uses a different design philosophy than Cisco's. While
Cisco using so many components for dedicated and authoritative roles,
Fortinet SD-WAN requires only one mandatory product which is FortiGate.
However, FortiManager is timely used....
We have the same problem on 400F ULL ports with the use of Cisco SFP+
DAC (SFP-H10GB-CU5M), TAC said that they did not reproduce the issue
with Fortinet certified transceivers. Also, downgrading to version 7.4.3
(Feature level release) solves the pro...
