# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
	address 192.168.253.253
	netmask 255.255.255.0
	#gateway 192.168.253.1
	#dns-nameservers 192.168.253.1
	post-up /sbin/ethtool -s eth0 autoneg off speed 100 duplex full  # <--- この行

#iface eth0 inet dhcp

auto eth1
iface eth1 inet static
	address 192.168.254.254
	netmask 255.255.255.0