> Source: [sk106651](https://support.checkpoint.com/results/sk/sk106651)

# sk106651 - Switch log shows that Check Point MAC Address 0000.0000.XXXX is flapping between ports on the same VLAN

| Property | Value |
|----------|-------|
| Solution ID | sk106651 |
| Date Created | 2016-01-11 |
| Last Modified | 2020-03-01 |
| Technical Level | Advanced |
| Products | Security Gateway, Hardware |
| Versions | R82.10, R82, R81.20, Not Version-Specific |
| OS | Gaia |
| Platform | 3000 |

## Symptoms

- Log on physical switch shows that Check Point MAC Address 0000.0000.XXXX is flapping between ports on the same VLAN (these ports are shared between multiple Virtual Systems of a VSX Cluster).

Example of a log from Cisco switch:  

`MACFLAP_NOTIF: Host 0000.0000.6e00 in vlan 50 is flapping between port Gi0/1 and port Gi0/2`

## Cause

By default, Virtual Systems in a VSX Cluster use the same MAC Address for CCP packets. If these Virtual Systems are connected on the same network / VLAN, then the physical switch detects the same MAC Address behind different ports and generates the above log.

## Solution

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

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