节点发现的几种实现方法

1.  使用ping命令

$ for ip in $(seq 1 254); do ping -c 1 192.168.1.$ip>/dev/null; [ $? -eq 0 ] && echo "192.168.1.$ip UP" || : ; done

2. 使用nmap

[root@localhost temp]# nmap -sP 192.168.1.0/24

Starting Nmap 5.51 ( http://nmap.org ) at 2013-12-24 22:45 CST

Nmap scan report for 192.168.1.100

Host is up (0.037s latency).

MAC Address: C4:6A:B7:8A:1B:AF (Unknown)

Nmap scan report for 192.168.1.105

Host is up.

Nmap scan report for 192.168.1.106

Host is up (0.075s latency).

MAC Address: 00:08:CA:2C:60:82 (TwinHan Technology Co.)

Nmap scan report for 192.168.1.253

Host is up (0.0024s latency).

MAC Address: 38:83:45:9B:A6:92 (Unknown)

Nmap done: 256 IP addresses (4 hosts up) scanned in 7.53 seconds