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#!/bin/sh
set -e
# Configure the MTU for the interface
# See https://github.com/NetworkConfiguration/dhcpcd/issues/67 and https://launchpad.net/bugs/2056194
set_mtu() {
local mtu="$1" interface="$2"
if [ "$mtu" -lt 576 ]; then
echo "MTU $mtu is smaller than 576 which is the minimum for dhcpcd. Ignoring MTU." >&2
return
fi
echo "${mtu}" > "/sys/class/net/${interface}/mtu"
echo "MTU of ${interface} set to ${mtu}"
}
if ${if_up?} && [ -n "${new_interface_mtu-}" ]; then
set_mtu "${new_interface_mtu}" "${interface?}"
fi