在IPv4网络中，arping是一款用户态用来探测host link-layer address的常用工具；

在IPv6网络中，同样有一款类似的工具ndisc6, 用来探测链路上任意node的link-layer address,

接下来简单介绍下如何安装及使用ndisc6这款工具。

sudo yum install ndisc6 -y

Usage: ndisc6 [options] <IPv6 address> <interface>
Looks up an on-link IPv6 node link-layer address (Neighbor Discovery)

  -1, --single   display first response and exit
  -h, --help     display this help and exit
  -m, --multiple wait and display all responses
  -n, --numeric  don’t resolve host names
  -q, --quiet    only print the link-layer address (mainly for scripts)
  -r, --retry    maximum number of attempts (default: 3)
  -s, --source   specify source IPv6 address
  -V, --version  display program version and exit
  -v, --verbose  verbose display (this is the default)
  -w, --wait     how long to wait for a response [ms] (default: 1000)

ndisc6 240e:1:2:3::1 eth0