node.js - nodejs http request immediately after adding a new address result in EADDRNOTAVAIL -

//nodejs code  var ip=<some_ip_address>; //for me 2001:250:401:3611:50c6:6b18:e8f7:f882  exec('powershell new-netipaddress '+ip+' -interfacealias wlan',(e,so,se)=>{     http.request({         host:'2404:6800:4005:805::200e',//just use google example         family:6,         localaddress:ip     },(res)=>{         console.log('reachable');     }).on('error',(e)=>{         console.log(e);     }) }).stdin.end(); 

then output

{[error: bind eaddrnotavail 2001:250:401:3611:50c6:6b18:e8f7:f882] code: 'eaddrnotavail', errno: 'eaddrnotavail', syscall: 'bind', address: '2001:250:401:3611:50c6:6b18:e8f7:f882' } 

the 2nd time (actually testing address , since our dhcp-stateless broken)

{ [error: connect etimedout 2404:6800:4005:805::200e:80] code: 'etimedout', errno: 'etimedout', syscall: 'connect', address: '2404:6800:4005:805::200e', port: 80 } 

me can draw 2nd time output,

new-netipaddress did add address properly, callback runs well(although timeout, designed be)

but in 1st time callback failed eaddrnotavail

so why failed first run? , how avoid it?

thanks @sandersteffann 's knowledge on tentative address, think of solution may not good

exec('powershell new-netipaddress '+ip+' -interfacealias wlan',(e,so,se)=>{     http.request({     host:'2404:6800:4005:805::200e',//just use google example     family:6,     localaddress:ip },(res)=>{     console.log('reachable'); }).on('error',(e)=>{     console.log(e); }) }).stdin.end();   exec('powershell new-netipaddress '+ip+' -interfacealias wlan',(e,so,se)=>{ execsync('powershell get-netipaddress '+ip)     http.request({     host:'2404:6800:4005:805::200e',//just use google example     family:6,     localaddress:ip },(res)=>{     console.log('reachable'); }).on('error',(e)=>{     console.log(e); }) }).stdin.end(); 

line 2:++++execsync('powershell get-netipaddress '+ip)