How do I use IPv6 Path MTU Discovery?

Issue

How do I use IPv6 Path MTU Discovery?
RFC-1981 defines that IPv6 endpoints must discover the largest packet size, how do I do this?

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Here are the common uses of Markdown.

Code blocks

~~~
Code surrounded in tildes is easier to read
~~~

Links/URLs

[Red Hat Customer Portal](https://access.redhat.com)