> Source: [sk67660](https://support.checkpoint.com/results/sk/sk67660)

# sk67660 - Error 'Illegal route. The Next Hop Gateway is unreachable via the defined interfaces' appears in SmartDashboard when trying to edit the Topology of VSX object

| Property | Value |
|----------|-------|
| Solution ID | sk67660 |
| Date Created | 2012-02-21 |
| Last Modified | 2018-10-16 |
| Technical Level | Advanced |
| Products | Security Gateway, Security Management Server, Multi-Domain Security Management Server, Hardware |
| Versions | R82.10, R82, R81.20, R82.10, R82, R81.20, R82.10, Not Version-Specific, R82.20, R81.20, R82, R82.20 |
| OS | Gaia |

## Symptoms

- Error '`Illegal route. The Next Hop Gateway is unreachable via the defined interfaces`' appears in SmartDashboard when trying to edit the Topology of VSX object

## Cause

The Default Route associated with the interface needs to be listed at the top of the Routing Table.

## Solution

This solution requires authentication. Please log in to view the full solution.

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