EoMPLS fragmentation

Hi

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My understanding is that a MPLS-core will not fragment packets containing EoMPLS.

Is there any way to circumvent this? For example:

Lower the MTU on the customer facing interface on the PE which has the xconnect , so that a packet is fragmented before MPLS-tags are added?

Creating a GRE tunnel over the low-mtu part of the network so that the GRE-tunnel packets with the new IP-header which hide the underlying IP packet and MPLS-tags get fragmented and reassembled?

Any other way?

We will implement ip tcp adjust-mss, so the majority of packets will be small enough to avoid fragmentation, but want to support up to 1500 for the customer networks.

Kind regards