vyos-1x.git/src/tests/test_interfaces_openvpn.py, branch rolling VyOS command definitions, scripts, and utilities (mirror of https://github.com/vyos/vyos-1x.git) https://git.amelek.net/vyos/vyos-1x.git/atom?h=rolling 2026-09-29T21:33:24+00:00 openvpn: T9364: default the MTU to 1420 when DCO is enabled 2026-09-29T21:33:24+00:00 Antonio Quartulli antonio@mandelbit.com 2026-09-28T14:02:20+00:00 urn:sha1:12d3aa212f35b8cdd9a0ccd849b45beea46ed94d The ovpn Kernel module does no MSS clamping, so with a 1500 bytes MTU full sized packets get fragmented on the underlay. Add an "mtu" node, rendered as "tun-mtu". With "offload dco" it defaults to 1420, unless a raw tun-mtu/link-mtu/udp-mtu option is present. Reject "mtu" together with such an option, below 100, and below 1280 when IPv6 runs inside the tunnel.