this post was submitted on 28 Sep 2024
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I wish my backup was symmetric or that a symmetric-capable backup provider was even available here. lol. I used to use cable internet as my backup, but the provider kept cutting the upload (used to be 40 Mbps then they incrementally cut it to 20 and finally 10!) Currently using TMobile's 5G home internet as my backup, and that performed better than the cable last time I had to cut over to backup WAN.
Yeah, I had a similar fallback issue. When it failed back over, some routes got "stuck" on the backup path and continued to pass over that until I toggled the interface. Have since added a step to my failback script to up/down the backup WAN interface which should fix that on the next outage.