Comment 3 for bug 1878257

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Nick Tait (nick.t) wrote :

I understand that systemd.network now supports setting the advmss setting? From "man systemd.network":

[ROUTE] SECTION OPTIONS
...
  TCPAdvertisedMaximumSegmentSize=
    Specifies the Path MSS (in bytes) hints given on TCP layer. The usual suffixes K, M, G, are supported and are understood to the base of 1024. An unsigned integer in the range 1–4294967294. When unset, the kernel's default will be used.

I haven't tried it myself, as I am in the process of reconfiguring my network and no longer require this feature, but in theory this now means that netplan could offer this feature with networkd backend.

Thanks,
Nick.