> Source: [sk116776](https://support.checkpoint.com/results/sk/sk116776)

# sk116776 - Instability issues in VPN Tunnel with Cisco using IKEv2

| Property | Value |
|----------|-------|
| Solution ID | sk116776 |
| Date Created | 2017-04-09 |
| Last Modified | 2020-07-07 |
| Technical Level | Advanced |

## Symptoms

- * Instability issues in VPN Tunnel with Cisco using IKEv2.
* VPND crashes with core dump files during IKEv2 logs creation.
* `$FWDIR/log/vpnd.elg` file on Check Point Security Gateway shows:

  ```
  [ikev2] Message::decodeAllPayloads: payload 8: Notify (next=Notify)
  [ikev2] NotifyPayload::Decode: Notify payload (type 16384) has no data
  [ikev2] Message::decodeAllPayloads: payload 9: Notify (next=Notify)
  [ikev2] Message::decodeAllPayloads: payload 10: Notify (next=Notify)
  [ikev2] NotifyPayload::Decode: Notify payload (type 16394) has no data
  [ikev2] Message::decodeAllPayloads: payload 11: Notify (next=None)
  [ikev2] NotifyPayload::Decode: Notify payload (type 16395) has no data
  [ikev2] ikev2_id_data_str: ID data type: 1 
  ```

## Cause

The Cisco peer is sending information bigger than the Check Point's buffer, causing the VPND to crash.

## Solution

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