In troubleshooting multi-WAN setups, we can group the problems we are likely to encounter into three broad categories:
- There may be a connectivity issue with either your primary or secondary connection.
- There may be a misconfiguration in your setup.
- pfSense thinks a gateway is up when it is actually down, or vice-versa.
The first point seems rather obvious, but you'll want to make sure that both connections are working independent of the gateway group. If the second connection accounts for a low percentage of our overall bandwidth (for example, our primary connection is broadband and our secondary connection is DSL), or is part of a failover group, then we might not notice it is not working until the primary connection fails. Ensuring that both connections work when we first set things up will potentially save us some grief; we wouldn't want to wait...