ICMP problem

RouterOS Beginner Basics
1

Hello,

We have configured our Mikrotik router we are facing with ICMP problems;
When a server is offline and when you try to ping that IP it give router IP with Destination host unreachable

Sample of ping:

ping xxx.xxx.xxx.xxx

Pinging xxx.xxx.xxx.xxx with 32 bytes of data:
Reply from [transit IP]: Destination host unreachable.
Reply from [transit IP]: Destination host unreachable.
Reply from [transit IP]: Destination host unreachable.
Reply from [transit IP]: Destination host unreachable.

Ping statistics for xxx.xxx.xxx.xxx:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),


Can anyone help me with this?

2

This is normal behavior. When the router has no ARP entry for the device, then it cannot forward the packet any further. As a “courtesy” the router sends an ICMP message to the sender so they know the address is not reachable.

3

^ Hoe can i fix this?

4

By bringing the server online again. :wink:

5

You can’t fix what isn’t broken.
Get a clue.

6

Again - this is not a problem. It’s normal behavior.

Anyone pinging this address and getting such replies should know that this means it’s down.
Any monitoring package getting such replies should not register them as the device being up.