Hi,
we use 2 CRS317 with MLAG (LACP) configuration.
MLAG ports:
- Po1, Po2 - 2x FortiGate 100F Active-Active HA config
- Po211, Po212, Po213, Po215 - 4x CRS326-24G-2S+ with active LAG config (SwOS v2.13)
It is working well for 15-30 minutes, after comes a loop like this (CRS317 logs):
May 6 09:02:53 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:10 changed ports: Po1 to Po2
May 6 09:02:53 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:10 changed ports: Po2 to Po1
May 6 09:02:53 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:10 changed ports: Po1 to Po2
May 6 09:02:53 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:10 changed ports: Po2 to Po1
May 6 09:02:53 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:10 changed ports: Po1 to Po2
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:50 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po213
May 6 09:29:51 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:51 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:51 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po2
May 6 09:29:51 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po2 to Po213
May 6 09:29:51 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po213 to Po212
May 6 09:29:51 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po212 to Po211
May 6 09:29:51 _switch_host_name_ host _fortigate_lacp_interface_MAC_address_:24 changed ports: Po211 to Po2
CPU utilization goes to 40-50% and after more 80-90%, and pocket loss comes.
Other side on Po1 - Po2 MLAG ports we changed FortiGates HA configuration Active-Active to Active-Passive mode, but loop comes.
We realized this problem after updated to v7.2.3 stable version.
Have you got any idea about this issue?
(At the end of _fortigate_lacp_interface_MAC_address_:xx is a VLAN ID?)
Thanks,
Ferenc Bauer