| Description |
In troubleshooting scenario to see if FortiGate is performing link monitor and its status.
Perform the following commands:
diagnose debug reset
diagnose debug application link-monitor -1
diagnose debug enable
Following is the sample output:
iron-kvm02 # lnkmtd::ping_do_addr_up(136): ---> google-4-VIRTUAL_WAN_LINK-4->8.8.8.8(8.8.8.8), rcvd
lnkmtd::monitor_peer_recv(2128): ---> google-4-VIRTUAL_WAN_LINK-4 send time 1727070826s 793684us, revd time 1727070826s 809536us
lnkmtd::monitor_ppeer_fail(1803): ---> google-3-VIRTUAL_WAN_LINK-3(8.8.8.8 ping) is dead.
lnkmtd::ping_send_msg(432): ---> ping 8.8.8.8 seq_no=667, icmp id=267, send 20 bytes
lnkmtd::monitor_proto_peer_send_request(625): ---> google-3-VIRTUAL_WAN_LINK-3(8.8.8.8:ping) send probe packet, fail count(0)
lnkmtd::ping_send_msg(432): ---> ping 8.8.8.8 seq_no=667, icmp id=1, send 20 bytes
lnkmtd::monitor_proto_peer_send_request(625): ---> google-4-VIRTUAL_WAN_LINK-4(8.8.8.8:ping) send probe packet, fail count(0)
lnkmtd::monitor_ppeer_fail(1803): ---> google-5-VIRTUAL_WAN_LINK-5(8.8.8.8 ping) is dead.
lnkmtd::ping_send_msg(432): ---> ping 8.8.8.8 seq_no=667, icmp id=268, send 20 bytes
lnkmtd::monitor_proto_peer_send_request(625): ---> google-5-VIRTUAL_WAN_LINK-5(8.8.8.8:ping) send probe packet, fail count(0)
lnkmtd::ping_do_addr_up(136): ---> google-4-VIRTUAL_WAN_LINK-4->8.8.8.8(8.8.8.8), rcvd
lnkmtd::monitor_peer_recv(2128): ---> google-4-VIRTUAL_WAN_LINK-4 send time 1727070827s 306708us, revd time 1727070827s 333986us
lnkmtd::ping_send_msg(432): ---> ping 8.8.8.8 seq_no=668, icmp id=267, send 20 bytes
lnkmtd::monitor_proto_peer_send_request(625): ---> google-3-VIRTUAL_WAN_LINK-3(8.8.8.8:ping) send probe packet, fail count(1)
lnkmtd::ping_send_msg(432): ---> ping 8.8.8.8 seq_no=668, icmp id=1, send 20 bytes
lnkmtd::monitor_proto_peer_send_request(625): ---> google-4-VIRTUAL_WAN_LINK-4(8.8.8.8:ping) send probe packet, fail count(0)
lnkmtd::ping_send_msg(432): ---> ping 8.8.8.8 seq_no=668, icmp id=268, send 20 bytes
lnkmtd::monitor_proto_peer_send_request(625): ---> google-5-VIRTUAL_WAN_LINK-5(8.8.8.8:ping) send probe packet, fail count(1)
lnkmtd::ping_do_addr_up(136): ---> google-4-VIRTUAL_WAN_LINK-4->8.8.8.8(8.8.8.8), rcvd
diagnose debug disable --> To stop debug.
Explanation:
Here it is possible to see ping from 'google-4-VIRTUAL_WAN_LINK-4' is a success and all others failed.
The health check configured is towards 8.8.8.8.
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