Configure static IP
# /etc/network/interfaces auto eth0 iface eth0 inet static address 10.10.0.12 netmask 255.255.255.0 # network 192.168.0.0 # broadcast 192.168.1.255 gateway 10.10.0.1 #dns-nameserver 8.8.8.8 dns-nameservers 10.10.1.253 10.10.1.254 dns-search example.com dns-domain example.com up route add -net 10.20.0.0 netmask 255.255.0.0 gw 10.10.1.1
Configure by DHCP IP
auto eth0 iface eth0 inet dhcp
Configure manual
auto eno1 iface eno1 inet manual bond-master bond0 # Example /etc/network/interfaces auto lo iface lo inet loopback # device: eth0 auto eth0 iface eth0 inet static address 178.63.46.216 broadcast 178.63.46.255 netmask 255.255.255.192 gateway 178.63.46.213 # default route to access subnet up route add -net 178.63.46.192 netmask 255.255.255.192 gw 178.63.46.213 eth0 post-up /sbin/route add -net 192.168.0.0 netmask 255.255.0.0 gw 192.168.1.1 #new http://panticz.de/nmap-ip-and-portscan
VLAN
# show VLANs cat /proc/net/vlan/config # old # scan ip from mac NET=192.168.0 for ((i=1; i<=254; i++));do ping -c 1 ${NET}.$i 2>&1 >/dev/null arp -a ${NET}.$i done NET=10.100.0 for ((i=200; i<=230; i++));do ping -c 1 ${NET}.$i 2>&1 > /dev/null || echo ${NET}.$i done # fix interface name echo 'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="02:01:02:03:04:05", ATTR{dev_id}=="0x0", ATTR{type}=="1", NAME="eth0"' >> /etc/udev/rules.d/70-persistent-net.rules
Network namespaces
https://matthewarcus.wordpress.com/2018/02/04/veth-devices-network-namespaces-and-open-vswitch/
Bond
cat /sys/class/net/storage/bonding/miimon # get hardware mac address of interfaces hwinfo --network | egrep "Permanent HW Address|SysFS ID" | egrep -A1 "eth" | paste - - | sort | column -t # get bond interfaces lldpctl | egrep "Interface|SysName|PortID" | awk -F ' *: *' '{print $2}' | awk -F ',' '{print $1}' | paste - - - | egrep "^e" | awk '{print "'"$NODE"'",$1,$2,$4}' | column -t | sort -u -k 1,2 # get hardware interface id cat /proc/net/bonding/* | egrep "Interface|HW" | cut -d":" -f"2-" | paste - - | column -t | sort
ethtool -s eth0 msglvl 0
Links
# Bandwidth calculator
http://web.forret.com/tools/bandwidth.asp?speed=1000&unit=bps
# Subnet Calculator
http://www.davidc.net/sites/default/subnets/subnets.html