Trace Route

Trace Route is a diagnostic utility that assists in diagnosing and troubleshooting router connections on the Internet. By using Internet UDP packets similar to Ping packets, Trace Route can test interconnectivity with routers and other hosts that are spread along the network path until the connection fails or until the remote host responds.

Trace Route tool includes a IPv6 networking option. When testing interconnectivity with routers and other hosts, SonicOS uses the first IP address that is returned and shows the actual Trace Route address. If both IPv4 and IPv6 addresses are returned, by default, the firewall checks the IPv4 address. If the Prefer IPv6 Networking option is enabled, the check only IPv6 address.

To troubleshoot with Trace Route

1. Navigate to Device > Diagnostics > Trace Route.
2. Type the IP address or domain name of the destination host in the TraceRoute this host or IP address field.
3. In the Interface drop‐down menu, select which WAN‐specific interface you want to test the trace route from. Selecting ANY, the default, allows the firewall to choose among all interfaces—including those not listed in the drop‐down menu.
4. To TraceRoute for IPv6, select the Prefer IPv6 Networking checkbox.
5. Click GO. Depending on the route, this may take a few minutes. A popup table displays with each hop to the destination host. By following the route, you can diagnose where the connection fails between the firewall and its destination.