> Source: [sk169094](https://support.checkpoint.com/results/sk/sk169094)

# sk169094 - Security Gateways are in the "Lost" State in a Maestro Dual-Site environment

| Property | Value |
|----------|-------|
| Solution ID | sk169094 |
| Date Created | 2020-09-03 |
| Last Modified | 2022-08-22 |
| Technical Level | Advanced |
| Products | Scalable Platforms |
| Versions | R82.x, R82.20, R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * Security Gateways are in the "Lost" State in a Maestro Dual-Site environment.

* The output of the "`asg monitor`" command shows that all of the Security Gateways on one of the Sites are in the "Lost" state.

* **Notes** :
  * Applying a new configuration to the Security Group is possible, and the procedure succeeds without errors.
  * There is basic connectivity between the Maestro Orchestrators on the two sites. (It is possible to ping each site's Orchestrator from the Orchestrator on the other site.)

## Cause

**Environment:**

* Maestro Dual-site configuration.
* The Maestro Site Orchestrators are connected through 3rd party Layer-2 devices between the two sites.
* The 3rd party Layer-2 devices have been configured to pass the base VLANs used for inter-site communication (by default, VLAN 3600, VLAN 3601, VLAN 3951, and VLAN 3952).

The adjacent 3rd-party Layer-2 devices connected to the Orchestrators for inter-site connectivity were not configured (or were misconfigured) with Q-in-Q tunneling for the required VLANs necessary for correct inter-site communication.

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## Solution

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