Windows 7 Cmd Mac Address
Violetta Wagganer
In an enterprise setting, having more than one DHCP server is likely. To make specific configuration changes to all of the servers requires querying to find the authorized DHCP servers that reside in Active Directory Domain Services (AD DS). As I illustrated yesterday, I can use a function from the DHCPServer module to query for authorized DHCP servers. This command and its associated output appear here.
Ok, so this is not going to be as easy as it could be. Now, I need to see what properties return from the Get-DHCPServerInDC function and compare it with the input syntax for the Get-DHCPServerSetting function. I pipe the first function to Format-List, for the second function, I use Get-Help, and I expand the syntax. The commands and associated output from those commands are shown in the image here.
Dude, that is not a problem. I can use the DNSName property and supply it to the ComputerName property. No sweat! So I use an Up Arrow, and change the command a bit, and quickly press Enter. Bummer! An error arises. In fact, this time it appears to be a bogus error because it says the parameter is null or empty, and I know good and well that my first cmdlet returns information for that property. The clue here is that it says it cannot validate the argument for ComputerName. The command and associated error are shown here.
DHCP conflict detection attempts determine whether the DHCP server sends a test ping for an available IP address prior to handing out the address to a DHCP client. A successful ping means that the IP address currently exists on the network; therefore, the DHCP server does not hand out that address.
A ping request failure means the address does not exist and therefore the DHCP server will hand out that address. This is useful in scenarios in which you set up a new DHCP server to take over handing out address from a failed server when no backup exists, and therefore, there is no record of addresses from the scope that are in existence.
Because the DHCP server with IP address conflict detection checks for address existence prior to handing the address out to the DHCP client, IP address conflicts should not be a problem. Obviously, this is an exception case, and by default, IP address conflict detection is off.
The default value for conflict detection attempts is zero, but I can set the value between zero and six. Each number (1..6) determines the number of pings issued before handing out the IP address to a DHCP client. Each additional attempt adds 1 second to the amount of time a DHCP client waits prior to receiving the address.
Therefore, setting the conflict detection attempts to six would cause a six-second delay for each client requesting an IP address. This increases the load on the DHCP server. The Best Practice Analyzer for Dynamic Host Configuration Protocol (DHCP) generates a warning if the IP address conflict detection has a value greater than 3. TechNet recommends a value of no greater than two for this parameter.
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Windows server 2016, 2 NIC ports, teamed with Microsoft Network Adapter Multiplexor Driver, no VMs, no VPNs, no load balancer. After rebooting, the MAC address keeps changing (based on IPCONFIG /all). Application software is based on MAC, so the application keeps failing after reboot.
I've read that the Team uses the first NIC cards MAC, but I've also read that it may choose randomly based on load balancing. I cannot view the MACs of the ethernet adapters. I'm guessing this is because they're already teamed.
I couldn't find good documentation on how to set the MAC address of the NIC Team, so I'm making an assumption that I do the following: NICTeam > Properties > Configure > Advanced > MAC Address > Value... and set it to whatever 12 hex characters I want (000012345678). Is this correct?
Based on IPCONFIG, the NICTeam is presenting what looks like a standard MAC address. I'm assuming it's grabbing this from one of the NICs. If I use the method above and set the MAC to the same address, will I have conflicts in the future? ...or is it safer just to use 000012345678?
In my experience, the NIC team uses one of the MAC address of the underlying NICs but it usually stays the same. I have had duplicate MAC address messages but when I looked it up it was a non issue. I set the MAC address manually to get rid of that message.
I have very similar server setup: two teamed NICs and appears that one of the NICs (first) seems to present its MAC as the MAC that is presented when querying IPCONFIG /ALL. I am not onsite with server, so hesitate making any change that would make the server unavailable, unless there is (tested) process.
Physical Address Extension (PAE) is a processor feature that enables x86 processors to access more than 4 GB of physical memory on capable versions of Windows. Certain 32-bit versions of Windows Server running on x86-based systems can use PAE to access up to 64 GB or 128 GB of physical memory, depending on the physical address size of the processor. For details, see Memory Limits for Windows Releases.
The Intel Itanium and x64 processor architectures can access more than 4 GB of physical memory natively and therefore do not provide the equivalent of PAE. PAE is used only by 32-bit versions of Windows running on x86-based systems.
With PAE, the operating system moves from two-level linear address translation to three-level address translation. Instead of a linear address being split into three separate fields for indexing into memory tables, it is split into four separate fields: a 2-bit bitfield, two 9-bit bitfields, and a 12-bit bitfield that corresponds to the page size implemented by Intel architecture (4 KB). The size of page table entries (PTEs) and page directory entries (PDEs) in PAE mode is increased from 32 to 64 bits. The additional bits allow an operating system PTE or PDE to reference physical memory above 4 GB.
In 32-bit Windows running on x64-based systems, PAE also enables several advanced system and processor features, including hardware-enabled Data Execution Prevention (DEP), non-uniform memory access (NUMA), and the ability to add memory to a system while it is running (hot-add memory).
Windows automatically enables PAE if DEP is enabled on a computer that supports hardware-enabled DEP, or if the computer is configured for hot-add memory devices in memory ranges beyond 4 GB. If the computer does not support hardware-enabled DEP or is not configured for hot-add memory devices in memory ranges beyond 4 GB, PAE must be explicitly enabled.
When neither 4GT nor AWE are being used, the amount of physical memory that a single 32-bit process can use is limited by the size of its address space (2 GB). In this case, a PAE-enabled system can still make use of more than 4 GB of RAM to run multiple processes at the same time or to cache file data in memory.
4GT can be used with or without PAE. However, some versions of Windows limit the maximum amount of physical memory that can be supported when 4GT is used. On such systems, booting with 4GT enabled causes the operating system to ignore any memory in excess of the limit.
In most cases, the Dynamic Host Configuration Protocol (DHCP) automaticallyconfigures your system to use the IP addresses of your ISP's domain nameservers. To use Google Public DNS, you need to explicitly change the DNSsettings in your operating system or device to use the Google Public DNS IPaddresses. The procedure for changing your DNS settings varies according tooperating system and version (Windows, Mac, Linux, or ChromeOS) or the device(computer, phone, or router). We give general procedures here that might notapply for your OS or device; consult your vendor documentation for authoritativeinformation.
Depending on your system you may also have the option of enabling a newprivacy-oriented feature called DNS-over-TLS. This feature provides privacyand security for the DNS messages sent between your device and Google's DNSservers. Details on configuring this optional feature are in specific sectionsfor each system.
Before you change your DNS settings to use Google Public DNS, be sure to writedown the current server addresses or settings on a piece of paper. It is veryimportant that you keep these numbers for backup purposes, in case you need torevert to them at any time.
You can configure Google Public DNS addresses for either IPv4 or IPv6connections, or both. For IPv6-only networks with a NAT64 gateway using the64:ff9b::/96 prefix, you can use Google Public DNS64 instead of GooglePublic DNS IPv6 addresses, providing connectivity to IPv4-only services withoutany other configuration.
Because the instructions differ between different versions/releases of eachoperating system, we only give one version as an example. If you need specificinstructions for your operating system/version, please consult your vendor'sdocumentation. You may also find answers on our user group page.
Many systems let you to specify multiple DNS servers, to be contacted inpriority order. In the following instructions, we provide steps to specify onlythe Google Public DNS servers as the primary and secondary servers, to ensurethat your setup correctly uses Google Public DNS in all cases.
Select Use the following DNS server addresses. If there are any IPaddresses listed in the Preferred DNS server or Alternate DNSserver, write them down for future reference.
For more information see the Android blog post announcing the feature.Please note that in Android P, the default mode for Private DNS is "Automatic"which means it uses the network specified DNS server and it attempts a TLSconnection to port 853 before falling back to UDP on port 53.
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