After upgrade FOS v7.6.4 to v7.6.5, All VLANs were unable to reach VLAN1 by Core switch. It only reach 1 IP that assign to fortinet port and link to core switch. From VLAN1, we can access to another VLANs
Dear cvovh,
Please try to run the debug flow bellow, this will give more information what happens with the non working traffic :
diagnose debug reset
diagnose debug flow filter saddr XXXXXX <----source IP
diagnose debug flow filter daddr YYYYYY <----destination IP
diag debug flow show function-name enable
diag debug flow show iprope enable
diagnose debug console timestamp enable
diagnose debug flow trace start 999999
diagnose debug enable
An information for the routing will help, so please run the following:
get router info routing-table details x.x.x.x <--- replace with source IP , then run again the same command but with destination IP.
Best regards,
Fortinet
| User | Count |
|---|---|
| 2930 | |
| 1459 | |
| 869 | |
| 826 | |
| 455 |
The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges.
Copyright 2026 Fortinet, Inc. All Rights Reserved.