Linux TCP/IP network management tools: Net-tools VS iproute2

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Many system administrators still use Ifconfig, route, ARP, netstat command combinations to manage and debug network configurations, which are provided by the Net-tools package, but in the arch Linux, centos7/ RHEL7 and other distributions have been replaced with Iproute2 Net-toolsiproute2 is another network configuration tool to replace the function of net-tools;

Net-tools Access and modification of the network configuration is done through PROCFS (/PROC) and IOCTL system calls, while Iproute2 communicates with the kernel via a netlink socket; Importantly, IPROUTE2 development has been very good:
https://www.kernel.org/pub/linux/utils/net/iproute2/
Here is the comparison of the use of Net-tools and Iproute2:

List all network interfaces (including network cards that are not activated)

Use net-tools:$ ifconfig-a using iproute2:$ IP link Show

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Use net-tools:$ sudo ifconfig eth1 up$ sudo ifconfig eth1 down using iproute2:$ sudo IP link set down eth1$ sudo IP link set up E Th1

Configuring IPV4 Addresses

Use net-tools:$ sudo ifconfig eth1 10.0.0.1/24 using iproute2:$ sudo ip addr add 10.0.0.1/24 dev eth1 using Net-tools configuration multi ip:$ sudo ifco Nfig eth0:1 192.168.10.10 netmask 255.255.255.0 up$ sudo ifconfig eth0:2 192.168.10.15 netmask 255.255.255.0 up use Iproute2 with Place multi ip:$ sudo IP addr add 10.0.0.1/24 broadcast 10.0.0.255 dev eth1$ sudo ip addr add 10.0.0.2/24 broadcast 10.0.0.255 Dev E th1$ sudo ip addr add 10.0.0.3/24 broadcast 10.0.0.255 dev eth1 view eth0 IP address $sudo ip Addr List dev eth0

Remove the IPV4 address from the NIC

Use net-tools:$ sudo ifconfig eth1 0 using iproute2:$ sudo ip addr del 10.0.0.1/24 dev eth1

View the IPV4 address configured on the NIC

Use the net-tools:$ ifconfig eth1 to use iproute2:$ IP addr Show Dev eth1 if the NIC is bound to multiple IPs, IPROUTE2 can display all the addresses, and Net-tools can only display a

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Using net-tools:$ sudo ifconfig eth1 inet6 add 2002:0db5:0:f102::1/64$ sudo ifconfig eth1 inet6 add 2003:0db5:0:f102::1/64 use IP route2:$ sudo ip-6 addr add 2002:0db5:0:f102::1/64 dev eth1$ sudo ip-6 addr add 2003:0db5:0:f102::1/64 dev eth1

View the IPV6 address configured on the NIC

Using the net-tools:$ ifconfig eth1 using iproute2:$ ip-6 addr Show Dev eth1

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Use net-tools:$ sudo ifconfig eth1 inet6 del 2002:0db5:0:f102::1/64 using iproute2:$ sudo ip-6 addr del 2002:0db5:0:f102::1/64 D EV eth1

Change the NIC MAC address

Use net-tools:$ sudo ifconfig eth1 hw ether 08:00:27:75:2a:66 use iproute2:$ sudo ip link set dev eth1 address 08:00:27:75:2a:6 7

View the routing table

Use Net-tools: $route-n$ netstat-rn use iproute2:$ IP route show

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Use net-tools:$ sudo route add default GW 192.168.1.2 eth0$ sudo route del default GW 192.168.1.1 eth0 use iproute2:$ sudo ip r Oute add default via 192.168.1.2 dev eth0$ sudo ip route replace default via 192.168.1.2 Dev eth0

Adding and removing static routes

Use net-tools:$ sudo route add default GW 192.168.1.2 eth0$ sudo route del default GW 192.168.1.1 eth0 use iproute2:$ sudo ip r Oute add default via 192.168.1.2 dev eth0$ sudo ip route replace default via 192.168.1.2 Dev eth0

View Socket Statistics

Use net-tools:$ netstat$ netstat-l using iproute2:$ ss$ ss-l

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Use net-tools:$ arp-an with iproute2:$ IP neigh

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Use net-tools:$ sudo arp-s 192.168.1.100 00:0c:29:c0:5a:ef$ sudo arp-d 192.168.1.100 using iproute2:$ sudo ip neigh add 192.168 .1.100 lladdr 00:0c:29:c0:5a:ef dev eth0$ sudo ip neigh del 192.168.1.100 dev eth0

Add, remove, and view multicast addresses

 using net-tools:$ sudo ipmaddr add 33:44:00:00:00:01 dev eth0$ sudo  ipmaddr del 33:44:00:00:00:01 dev eth0$ ipmaddr show dev eth0$  Netstat -g using iproute2:$ sudo ip maddr add 33:44:00:00:00:01 dev eth0$  sudo ip maddr del 33:44:00:00:00:01 dev eth0$ ip maddr list  dev eth0 

Reference Documentation:
Iproute2 HowTo http://www.policyrouting.org/iproute2.doc.html
Iproute2 Mans http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2/
Rtnetlink http://www.man7.org/linux/man-pages/man7/rtnetlink.7.html
NetLink http://www.man7.org/linux/man-pages/man7/netlink.7.html

This article is from the "Geekwolf" blog, make sure to keep this source http://linuxgeek.blog.51cto.com/6014609/1549191

Linux TCP/IP network management tools: Net-tools VS iproute2