> Source: [sk185129](https://support.checkpoint.com/results/sk/sk185129)

# sk185129 - When the monitored next hop is considered unreachable, the system removes all static routes using the same next hop, not just the specific monitored route

| Property | Value |
|----------|-------|
| Solution ID | sk185129 |
| Date Created | 2026-07-07 |
| Last Modified | 2026-07-20 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- * After enabling Ping on a static route, traffic to destinations behind the same next hop stops.

* Multiple static routes that share the same next hop may also be removed from the routing table.

* Log entries in /var/log/routed_messages show that the next hop is detected as unreachable

  ```
  
  NOTICE:  ipreachdetect_set_reachable_ex(1705): Monitoring 192.168.11.253, phe->reachable 1, reachable 0
  NOTICE:  rt_static_mon_ip_change:Flag 0, Ip Reachability status received from 192.168.11.253
  DEBUG:   rt_static_update_ex(1291): Processing gateway 192.168.11.253
  DEBUG:   rt_static_update_ex(1323): Found entry 192.168.11.253 ping count is -1
  ```

  <br />

* Connectivity is restored after disabling the Ping monitoring option.

## Cause

When Ping monitoring is enabled for a static route, Gaia verifies if the next hop is reachable by sending an ICMP request and expecting an ICMP reply. If a reply is not received, the next hop is determined to be unreachable.   

The system may remove the specific monitored route or all routes associated with that same next hop.

## Solution

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

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