My MTU on all MPLS stuff is set for over 9000 so I can do jumbo. If you don’t want fragmentation or problems, your native MTU on layer2 needs to be larger probably. Then the next layer up a bit smaller, and so on so that you can again pass layer2 over the MPLS network at 1530.
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Jason McKemie Sent: Wednesday, April 5, 2017 12:46 PM To: af@afmug.com Subject: [AFMUG] MPLS/VPLS MTU What is the best way to test a link to make sure you're not going to have issues running MPLS over it? Can the packets be fragmented, or will that cause issues? I'm able to ping the other end of a couple of links with 1530 byte packets, but when I disallow fragmentation, things stop working. -Jason
