Ping MTU issue

[palani2010]

If i ping 8.8.8.8, what mtu value will it take.

Let say i have kept default mtu 1500.  

Below is sample output from SDWAN device which have 3 transport wan connections verified all three connectivity upto 1472 is reachable beyond that traffic is getting dropped.

# ping 8.8.8.8 source ge1/7 size 1473 rapid count 100
Ping in VPN 0
....................................................................................................
--- 8.8.8.8 statistics ---
100 packets transmitted, 0 received, 100% packet loss

# ping 8.8.8.8 source ge1/7 size 1472 rapid count 100
Ping in VPN 0
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
--- 8.8.8.8 statistics ---
100 packets transmitted, 100 received, 0% packet loss

[balaji.bandi]

what SD-WAN device is this Vitella or Cisco hardware running SD-wan image, what is the config on the interface MTU ?

I do not like to re-invent the wheel for MTU discussion, there is good discussion want to refer here :

https://community.cisco.com/t5/routing/wan-mtu-change-impact-on-applications/td-p/1716839

[palani2010]

Vipetala

[balaji.bandi]

what config that interface configured MTU  ? what is the Internet provider MTU offers ?

[palani2010]

Our end configured with default mtu - 1500

Internet provider configured with mtu - 1514