> Source: [sk173583](https://support.checkpoint.com/results/sk/sk173583)

# sk173583 - <em>show ip-reachability-detection</em> shows "not reachable" when IP address is reachable through VTI

| Property | Value |
|----------|-------|
| Solution ID | sk173583 |
| Date Created | 2021-05-17 |
| Last Modified | 2021-05-19 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * The clish command *show ip-reachability-detection* shows that an IP address is non-reachable when the IP address is reachable through Virtual Tunnel Interface (VTI).
* This is the output of the clish command *show ip-reachability-detection* :

  ```
  
  Ping Count: 3 
  
  Ping Interval: 3 
  

  
  BFD Minimum TX Interval: 300 ms 
  
  BFD Minimum RX Interval: 300 ms 
  
  BFD Detect Multiplier: 10 
  

  
  *Only the cluster master can send or accept ICMP packets.
  

  
  Remote Address                            Protocol    Reachable* 
  
  x.x.x.x  _  _  _  _  _  _  _  _  _  ICMP        No
  ```

* The kernel debug shows this error:   
  "`task_timer_dispatch: calling IPREACHDETECT_PingHelper Timer, late by 0:00.000 `  
  `
  ipreachdetect_expiry(337): Pinging x.x.x.x, ping count -1 `  
  `
  ipreachdetect_expiry(347): Pinging x.x.x.x FAILED, ping count -1`"

## Cause

The cluster does not fold the vpnt VIP to the physical IP. Because of this, *icmp_recv* does not process the reply, so i*p-reachability-detection*shows the IP as non-reachable.

## Solution

[Contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for this issue.   
A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.   
For faster resolution and verification please collect [CPinfo](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk92739) files from the Security Management and Security Gateways involved in the case.

**Hotfix installation instructions:**   
Refer to [sk168597 - How to install a Hotfix](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).
[](https://www.checkpoint.com/support-services/contact-support/)

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