> Source: [sk33743](https://support.checkpoint.com/results/sk/sk33743)

# sk33743 - Permanent VPN tunnels between Edge devices and VPN gateways flap (changing status from "up" to "down")

| Property | Value |
|----------|-------|
| Solution ID | sk33743 |
| Date Created | 2007-10-23 |
| Last Modified | 2015-12-04 |
| Technical Level | Advanced |

## Symptoms

- Permanent VPN tunnels between Edge devices and VPN gateways flap (changing status from "up" to "down").

## Cause

Established permanent tunnels, are kept in the kernel table 'tnlmon_life_sign', which is limited to 200 entries by default. The 201st entry will begin to overwrite existing entries, causing permanent VPN tunnels to appear down. although the tunnels are actually up.

## Solution

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

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