ssh configuration file could be like this

vi ~/.ssh/config

Host xolive
        User xuelab
        Hostname 101.6.120.23
        Port 186
Host olive
        User xuelab
        Hostname 192.168.0.16

Host irainbow
        User xuelab
        Hostname 192.168.0.10
Host rainbow
        User xuelab
        Hostname 101.6.120.23
        Port 180

Host yellow
        User xuelab
        Hostname 166.111.157.15

Host purple
        User xuelab
        Hostname 166.111.157.57

Host indigo
        User xuelab
        Hostname 101.6.121.208

Host gold
        User xuelab
        Hostname 101.6.121.48

Host white
        User xuelab
        Hostname 101.6.122.12

Host black
        User xuelab
        Hostname 101.6.121.167

Host red
        User xuelab
        Hostname 192.168.0.11
Host xred
        User xuelab
        Hostname 101.6.120.23
        Port 181

Host blue
        User xuelab
        Hostname 192.168.0.12
Host xblue
        User xuelab
        Hostname 101.6.120.23
        Port 182

Host green
        User xuelab
        Hostname 192.168.0.13
Host xgreen
        User xuelab
        Hostname 101.6.120.23
        Port 183

Host orange
        User xuelab
        Hostname 192.168.0.14
Host xorange
        User xuelab
        Hostname 101.6.120.23
        Port 184

Host violet
        User xuelab
        Hostname 101.6.121.145

Host azure
        User nmrsu
        Hostname 192.168.0.18
Host eazure
        User nmrsu
        Hostname 101.6.120.23
        Port 188

Host *
        ServerAliveInterval 300
        ServerAliveCountMax 3

Network chart