→ Applies to: SynetoOS 5.x

Step 1. Connect to SynetoOS appliance via SSH as admin

ssh admin@<your_ip_address_or_hostname>

Step 2. Get root privileges

sudo su -

Step 3. Test the transmission of packets with a specific MTU value (replace <packets_size> with the MTU packet size to send and <ip> with the target IP)

ping -s <packets_size> -M do <ip>

EXAMPLE

ping -s 1400 -M do 213.212.132.230

EXAMPLE OUTPUT

Successful transmission

PING 213.212.132.230 (213.212.132.230) 1400(1428) bytes of data.
1408 bytes from 213.212.132.230: icmp_seq=1 ttl=54 time=22.4 ms
1408 bytes from 213.212.132.230: icmp_seq=2 ttl=54 time=22.1 ms

Failed transmission

PING 213.212.132.230 (213.212.132.230) 1400(1428) bytes of data.

--- 213.212.132.230 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2005ms

The default MTU size is 1500, however, for certain network technologies, reducing the MTU size and allowing fragmentation can help eliminate some connectivity issues occurring at the protocol level.