Install ionic cordova

I have an error on installing ionic cordova. The error is give below

C:\Users\user> npm install -g cordova ionic
npm ERR! Windows_NT 6.2.9200
npm ERR! argv “C:\Program Files\nodejs\node.exe” “C:\Program Files\nodejs\
node_modules\npm\bin\npm-cli.js” “install” “-g” “cordova” "ionic"
npm ERR! node v6.11.1
npm ERR! npm v3.10.10

npm ERR! network tunneling socket could not be established, cause=getaddrinfo EN
npm ERR! network This is most likely not a problem with npm itself
npm ERR! network and is related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settin
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network ‘proxy’ config is set properly. See: ‘npm help config’

npm ERR! Please include the following file with any support request:
npm ERR! C:\Users\user\npm-debug.log

Please give any solution for that error…
Thanks in advance

You have to fix your npm to work with your proxy you configured. Only your company sysadmin can help you with that, we don’t know anything about your network and internal restrictions.

ok… …thanks