Jody Lemoine CD 🇨🇦I just spent an hour #Labbing an #L2TPv3 pseudowire native fragmentation (#PWE3) problem. Turns out the platform doesn’t •do• native fragmentation, but it took forever for me to figure this out because my oversized #IPv6 pings were making it across the wire. This shouldn’t happen without native fragmentation.
Two coffees later it dawned on me that I was pinging from the device that was anchoring the pseudowire, so IPv6 was fragmenting at the source. A packet capture showed the fragmentation headers •and• the missing MRRU attribute in the L2TPv3 pseudowire setup. I should have started there.