MX84 with two internet links. One in failed state, but transmitting
I have an MX84, two internet links (100Mbps each). WAN2 shows as Active, WAN1 as failed.
Both are configured with static IP addresses, and worked when tested with the same addresses from a laptop connected directly to the ISP.
What is strange, is that a traceroute from the MX will show the correct path when tested with each uplink. WAN1 (in failed state), will show the expected next hop and the ISPs internal hosts. Those will be different from WAN2.
Hourly tested is configured in SD-WAN, and both links show packet loss near 0% (WAN1 shows 100% until it was plugged in, of course)
The route table shows:
The configuration is below. Clearly, traffic can flow on that interface, but status will not change to Active, and I suspect this means it will not send client traffic through it (it is configured to load balance).
The failed state means that it cannot reach the primary monitored IP (184.108.40.206 in your case). If you add another monitoring IP that you can reach over that link and make that primary it will show as active.
The traceroute shows the MX can reach 220.127.116.11 with either link, and in each case going through the ISP assigned to that link.
I've added 18.104.22.168 (one of google.com's addresses), and i get the same results: I can run a traceroute from the MX, each one goes a different route and through the ISP connected to each link, but WAN1 remains in failed state.
The historical data seems to show that 22.214.171.124 is reachable for both connections too:
If adding an additional IP for monitoring doesn't bring it up, you may also need to contact your ISP. Some ISPs will lock static IPs to mac addresses, and take forever to time it the arp table on their device.
Unfortunately, using a laptop to troubleshoot can make that timeout process last even longer. Still a very good troubleshooting step!