> Source: [sk34574](https://support.checkpoint.com/results/sk/sk34574)

# sk34574 - Using VLAN on cluster Sync interfaces

| Property | Value |
|----------|-------|
| Solution ID | sk34574 |
| Date Created | 2008-03-10 |
| Last Modified | 2020-12-29 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- Synchronization fails after configuring Sync interfaces on high VLAN tag when several VLAN tag are configured on the physical interfaces

## Cause

By design, the synchronization network is supported on the lowest VLAN tag only.

## Solution

For example, if three VLAN tags are configured on interface **eth1** - *10* , *20* and *30* , then only interface **eth1.10** may be used for Synchronization.

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