tcler's blog --- 其实我是一个程序员
Show me your flowcharts and conceal your tables, and I shall continue to be mystified. Show me your tables, and I won’t usually need your flowcharts; they’ll be obvious.

Install-WindowsFeature -Name DHCP -IncludeManagementTools
Import-Module DHCPServer

$staticIP = "192.168.155.40"
$ifindex = ( Get-NetAdapter | Where-Object { $_.InterfaceDescription -like "Mellanox*" }
New-NetIPAddress -InterfaceIndex $ifindex -IPAddress $staticIP -PrefixLength 24

Get-DhcpServerv4Binding | ForEach-Object { Set-DhcpServerv4Binding $_.InterfaceAlias 0 }

$ifAlias = (Get-DhcpServerv4Binding | Where-Object {$_.IPAddress -eq $staticIP}).InterfaceAlias
Set-DhcpServerv4Binding $ifAlias 1

Add-DhcpServerv4Scope -name rdma-lab -StartRange 192.168.155.64 -EndRange 192.168.155.128 -SubnetMask 255.255.255.0 -State Active

Set-DhcpServerv4Scope -ScopeId 192.168.155.0 -StartRange 192.168.155.64 -EndRange 192.168.155.200
Get-DhcpServerv4Scope

PS C:\Users\Administrator> Get-DhcpServerv4ScopeStatistics 

ScopeId          Free            InUse           PercentageInUse  Reserved        Pending         SuperscopeName 
-------          ----            -----           ---------------  --------        -------         -------------- 
192.168.155.0    0               65              100              0               0 

PS C:\Users\Administrator> Get-DhcpServerv4Lease -ScopeId 192.168.155.0 

IPAddress       ScopeId         ClientId             HostName             AddressState         LeaseExpiryTime 
---------       -------         --------             --------             ------------         --------------- 
192.168.155.64  192.168.155.0   ce-df-41-6b-74-19    dell-per750-44       Active               3/6/2026 1:33:14 AM 
192.168.155.65  192.168.155.0   46-88-d9-34-a9-3a    dell-per750-49       Active               3/5/2026 6:11:47 PM 
192.168.155.66  192.168.155.0   2a-9c-2b-a7-c2-02    dell-per750-47       Active               3/5/2026 6:13:10 PM 

> Get-DhcpServerv4Lease -ScopeId 192.168.155.0 | Remove-DhcpServerv4Lease
> Get-DhcpServerv4Lease -ScopeId 192.168.155.0 | 
    Where-Object { $_.HostName -like "dell-per750-4*" } | 
    Remove-DhcpServerv4Lease

> Set-DhcpServerv4Scope -ScopeId 192.168.155.0 -LeaseDuration 1.00:00:00
> Get-DhcpServerv4Scope -ScopeId 192.168.155.0 | Select-Object Name, LeaseDuration

nmcli co show
nmcli co up ens8

dhcpcd -k ens8
dhcpcd -n ens8