<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
</head>
<body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif;">
<div>Hi</div>
<div>I have an Openstack OVS/VXLAN setup with MTU of 1400. I have 2 Vms running on 2 different compute nodes </div>
<div>With ipv4 I am able to perform a ping with packet size of 1500 which is above the MTU and it works as fragmentation happens</div>
<div><br>
</div>
<div>Now with ipv6 I try the same test </div>
<div>
<p style="margin: 0px; font-size: 15px; font-family: 'Andale Mono'; color: rgb(41, 249, 20); background-color: rgb(0, 0, 0);">
ubuntu@testclient1:~$ ping6 -c10 -s 1500 2001:45::f816:3eff:fea2:d1b5</p>
<p style="margin: 0px; font-size: 15px; font-family: 'Andale Mono'; color: rgb(41, 249, 20); background-color: rgb(0, 0, 0);">
PING 2001:45::f816:3eff:fea2:d1b5(2001:45::f816:3eff:fea2:d1b5) 1500 data bytes</p>
<p style="margin: 0px; font-size: 15px; font-family: 'Andale Mono'; color: rgb(41, 249, 20); background-color: rgb(0, 0, 0);">
^C</p>
</div>
<div><br>
</div>
<div>And the ping fails. I wanted to do this since I had a UDP performance test with 8K packet size and noticed that packets were not going through</div>
<div><br>
</div>
<div>So how does one deal with larger packets above MTU size on these ipv6 tenant networks</div>
<div><br>
</div>
<div>Ajay</div>
<div><br>
</div>
<div><br>
</div>
</body>
</html>