[c-nsp] MPLS and links with limited MTU size

Nick Hilliard nick at foobar.org
Sun Jan 24 06:27:06 EST 2016

Victor Sudakov wrote:
> I was thinking perhaps about some tunneling technology, like maybe
> MPLS over GRE over those links? I'm sure I'm not the first to
> encounter such a situation.

GRE will fragment packets.  Fragmentation means reassembly before the
packets can be used by mpls.

You would need a tunneling mechanism which didn't fragment packets,
which would probably mean tunneling over TCP.  Probably openvpn would
work, but the performance would be terrible.


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