Hello fellow switchers,
Recently we started configuring l2circuit ccc's between our QFX5100 switch and an MX80 router.
We noticed that our customers using these l2circuits can only send packets not bigger than 1470 bytes.
At the MX80 side the interface is configured with an overall MTU of > 9000 and under the unit X family ccc hierarchy an MTU of > 1500 (usually 1520 or 1530).
At the QFX5100 side the interface is as well configured with an MTU of > 9000. Under family ccc we are unable to configure any MTU at all.
We hoped to be able to up the MTU there as well, but thought since the command is not available at that hierarchy it would automatically derive the MTU size from the interface itself.
But still, no packets larger than 1470.
Between two MX routers there is no issue at all..
I'll be happy to share the configuration if that helps with this matter.
Please advise what we can do here to help our customers.
Beeelze