MAC address script static or dynamic?

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• MAC address of the system of comments in Bridge mode

  Real quick question that I could not an idea says the response of previous forum posts.

  I have a piece of software that allowed off the coast of the MAC to the NETWORK card it uses.  We are ready to move to a virtualized environment, but you need to know to apply for a new license or not.  Our server has 4 GigE ports so it's not a lack of ports bridge-able.  So, if we have configured our guest with two NIC bridged interfaces, the NIC guest will have a MAC VMWare virtual or he will inherit the host NIC MAC?

  Hello

  the answer is Yes.

  Who manages the mac address of comments is usually vmware (virtualization software). If you want to use a mac outside the specific vmware mac address ranges (static or dynamic), then you should check the first link on my previous post.

  If the virtual machine running the software with license always must be run on a computer invited vmware, I recommend you to buy a new license and by setting a static of vmware mac address after the second link in my post above. In this case who runs the mac of comments is VMware.

  In any case if you want comments holds his old mac address, then the path follows the first link on my post above.

  Best wishes / Saludos.

  Pablo

  Please consider providing any useful answer. Thank you!! - Por favor considered premiar las useful responses. ¡¡MUCHAS gracias!

  Virtually noob blog

• Problem with security of the ports and disabled learning MAC addresses?

  Hello

  Is there a problem, or incompatibility, if you configure the port-security on "n" ports that belong to X vlan and also disable mac-address-table of learning on this vlan?

  Someone did he do reference, links or PDFs on this problem?

  Thank you very much

  Best regards.

  Hi Javier,

  As I showed above, the combination is valid. I did not all static entries in the security of the ports, but all entries learned through port security will be shown as static on the show see the mac address table. All dynamic learning is disabled.

  I don't know what kind of security problem, that you try to resolve, but the configuration is valid.

  Daniel Dib
  CCIE #37149

  Please evaluate the useful messages.

• Security ports SG 300 - 52-2 Mac addresses on Port 1

  Hello

  I have a 300-52 52-Port Gigabit Managed Switch Cisco SG. On the switch, I have two ports that are connected to the vlan comments.

  Now, I want to activate the safety of port on both ports. Is it possible to allow two addresses on a port?

  This is because there are two users who use this two ports. But the organizers can't users use the same all the time.

  Thank you and best regards,

  Dominique

  Hi Dominique, to add to the post of Christopher, if you wait 2 addresses on a port, but these 2 connections can connect to a different port, you can configure security of the static ports or dynamic for these ports.

  Here are 2 documents to help you.

  https://supportforums.Cisco.com/docs/doc-27720

  https://supportforums.Cisco.com/docs/doc-27753

  If you choose to use static MAC entries you can duplicate entries for the different interfaces.

  In addition, as an alternative, if you know the IP address and MAC address you can use dynamic arp inspection and achieve similar results much more strictly.

  -Tom
  Please mark replied messages useful

• Restrict access to the network on 871 router via mac address

  Hello

  I have a Cisco 871 router and I am trying to allow only specific MAC addresses access to the network. Is there a way to specify that only specific MAC addresses are allowed to access? Any other MAC access will be denied?

  I can either have static IP or DHCP for local machines.

  Can I use this "secure DHCP IP address assignment" details found here... http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ftdsiaa.html ?

  I use these...

  static Mac address table

  OR

  Security table of Mac addresses

  ... to achieve this?

  Thank you.

  You can use "mac-address-table static" If you know all the mac addresses that will be connected.

  If the router is by distributing ip addresses so you can indeed do secure IP DHCP address assignment.

  Note that you can make a 'mac access-list' switch and aplly in any vlan you want.

  Alternatively, you can do "dhcp snooping" allowing guests who got a dhcp ip addresses and are not identity theft.

  I hope it helps.

  PK

• Script to set the static Mac address

  I have an Infrastructure virtual with about 200 vm with several vNIC and automatic Mac address. I need to assign static Mac for all NICs for and want to perform this operation with a powershell script and a csv input file. I have the entry csv file that looks like this: Vm, portgroup Mac Vm1 00:11:22:33 Vm1, pg1, pg2, 00:11:22:44 Vm2, pg1, 00:11:44:44 (I know the Mac above are not valid) can anyone help with the powershell code to automate the static configuration of mac?  Thanks in advance

  Hello, ITS.

  You should be able to use the following to achieve:

  ## import the info from the CSV$colNICInfo = Import-Csv c:\vmNICInfo.csv$colNICInfo | %{    $oSingleNICInfo = $_    ## get the VM, get its NetworkAdapters and for the one whose NetworkName matches that from the CSV, set its MAC address    Get-VM $oSingleNICInfo.VMName | Get-NetworkAdapter | ?{$_.NetworkName -eq $oSingleNICInfo.NetwkName} | Set-NetworkAdapter -MacAddress $oSingleNICInfo.MACAddr -Confirm:$false -WhatIf} ## end foreach-object
  

  A few things to note:

  • I left the '-WhatIf "parameter on the Set-NetworkAdapter portion, so that you can run this first (perhaps with a small sample of game in the CSV file) to check that things look like they will work.  Remove this parameter to set the MAC addresses
  • The code provides that the CSV of this format:
    MACAddr VMName, NetwkName,
    someVM, VLAN128, 00:50:56:00:00:0F
  • The cmdlet Set-NetworkAdapter requires the new MAC address in the range 00:50:56:00:00:00 - 00:50:56:3F:FF:FF.  It's not the range likely to use, VMware only a subset.  Seems to be a limitation of the cmdlet (probably intentional).

  Message edited by mattboren: added a note about removing "-WhatIf" to actually set the MAC addresses of the network adapters

• using tools CLI to reconfigure the mac address static on VM?

  I've been poking around the CLI tools and perl scripts and do not see an easy way to reconfigure the address Mac to staticly assigned to a VM in the CLI.  Does anyone know useful tips to do this with the CLI?

  Yes/No, no VMware script canned exists today that help with this specific operation, but you can create your own script by using the vSphere API do and one of the operations that can be performed using the API.

  Here is a script that I wrote some time back and just changed to help manually assign a MAC address for a virtual machine given - vmNICManagement.pl

  =========================================================================

  William Lam

  VMware vExpert 2009

  Scripts for VMware ESX/ESXi and resources at: http://engineering.ucsb.edu/~duonglt/vmware/

  Twitter: @lamw

  repository scripts vGhetto

  Introduction to the vMA (tips/tricks)

  Getting started with vSphere SDK for Perl

  VMware Code Central - Scripts/code samples for developers and administrators

  VMware developer community

  If you find this information useful, please give points to "correct" or "useful".

• Static MAC address starting not not by 00:50:56?

  Hello

  I have a quick question before I go to bed (so I have no time for some tests).

  I just found this article on the static of MAC addresses: VMware KB: defining a MAC address of a NETWORK card virtual

  The article says that "VMware uses a different YES to manually generated addresses: 00:50:56.»  But can I use the autogenerated, MAC address that starts with 00: 0c: 29 (and of course ensure that ESXi uses the same MAC address for an another VM)?

  Thank you

  Hello..

  Both are actually automatically generated... 00: 00c: 29 is generated by the host ESXi itself when not associated with an instance of vCenter. 00:50:56 is generated by vCenter if the ESXi host is attached to the phone.

  But can I use the autogenerated, MAC address that starts with 00: 0c: 29 (and of course ensure that ESXi uses the same MAC address for an another VM)?

  Yes...

  / Rubeck

• MAC address static configuration

  Hello

  Is it possible to set a static MAC address for a virtual machine using VMware Player? I tried to follow these instructions for VMware Workstation:

  Maintenance and modification of the MAC address for a Virtual Machine

  but when I start the computer virtual, the changes that I made to the crushed vmx file, and I'm back to the original MAC address.

  Thank you

  James

  Check out this article and let me know: VMware KB: change MAC address of a hosted virtual machine

• assignment range static mac addresses

  Anyone know or knows where I can find what the mac address range is responsible for functions static mac end user for virtual machines?  There is a specific, cited in the 4.x documentation Beach, but the docs 5.x just say do not walk on the beaches of use reserved for vCenter Server, host network adapters physical, virtual cards, but says not what is Beach, reserved or allowed is, so I don't know what to avoid.  I opened a support ticket and asked the same question and I was told there is no specific void range defined for static assignment, and I have to look in my environment to see what was automatically generated for what could not be attributed.  Of course, this does not solve the potential problem of an address that I choose to be automatically generated by vcenter for a future new virtual machine.

  Also, does anyone know what virtual machine operations can cause the mac to change address?  I'm trying to determine whether it is necessary to assign a static address to a virtual machine that has a license associated with it, so I need to know what would be the probability of this change.  Support could not answer this question.

  Thanks to all in advance.

  Have you checked the http://pubs.vmware.com/vsphere-55/topic/com.vmware.ICbase/PDF/vsphere-esxi-vcenter-server-55-networking-guide.pdf 148 pages

  Documentation - once the MAC address is generated, it does not change unless the virtual machine MAC address conflicts

  with that of another virtual machine saved. The MAC address is stored in the virtual machine configuration file.

• Assign a static IP address via DHCP based on the Mac address of the virtual machine

  Hi all

  It is especially a feature request, as I'm sure that it is not currently possible to do what I want to do...

  I would like to be able to assign static IP addresses to VM without having to manually configure the network settings of the virtual machine directly. I want to be able to do it from the DHCP settings in the virtual network Editor.

  Most of the routers DHCP allow this. They give an IP address through DHCP based on the MAC address of the client. This means that the customer is concerned that he receives a regular IP DHCP address, but it is never change.

  DHCP is the default option for all OS this makes things much easier to manage, as IP addresses is assigned in the same way, in one place for all DHCP clients, regardless of the client operating system, and without having to manually keep track of which the IP is assigned to which customers etc..

  Also AFAIK at least for Ubuntu, you cannot assign a static IP address without having to also statically assign to the DNS server. It is only the IP address I need to be static, so I prefer not to have to worry about manually assign the DNS server.

  I can just kind of fudge making the really long DHCP lease duration, but the maximum is 99 days only, so finally addresses are going to change, that would mean a whole bunch of reconfiguration for VM services, etc..

  Does anyone know if the workstation 9 has this ability? I am currently on version 8, but I would probably upgrade this function only if she can do it.

  If there is no way to do what I want to directly through the virtual network Editor, can anyone recommend a way to do this, perhaps using Guest only network and then, by running a kind of services to the 3rd party NAT and DHCP on the host?

  Thank you

  Eugene

  There is no GUI option to get what you are looking for, but you can do it manually. Please take a look at Re: assign a static IP to guest with network adapter NAT Virt? where I posted an example.

  André

• Create the virtual computer with a static MAC address

  Hi all

  Im trying to create a virtual machine with PowerCLi but im failing to connect New - VM with an addapter network?

  I know that you can create new network addapter with:

  New-card network -MacAddress 00:50:56:bb:00:13 -Type e1000 -NetworkName ' Vlan 6 Virtual Machine '

  But this will create just a network card on the server im related to the use

  to connect-viserver

  New-VM

  -Name VMSTORE23 -$vmhost $esxhost -data store $datastore DiskMB - 20000 MemoryMB - 2019 -NumCpu 2

  I think that the cdmlet that I need to use is OScustomizationSpec - but like I said im strugling to connect?

  Someone at - it ideas.

  Thanks in advance for your help.

  Eddie

  You're almost there, the MAC address must be specified as a string, enclose it.

  New machine virtual- - name VMSTORE23 - $vmhost $esxhost - $datastore - DiskMB 20000 - MemoryMB 2048 Datastore - NumCpu 2 - NetworkName "Vlan 6 Machine virtual network | Get-NetworkAdapter | Set-NetworkAdapter -Type Vmxnet3 -MacAddress "00:50:56:bb:00:2 b" - confirm: $false

  I added the - confirm the setting, as it will not request the change.

• Script PowerShell to enter all hosts ESX MAC address

  I tried to find a way to use powershell to enter all ESX host MAC addresses in a specific data center. If someone has something that can be useful, please let me know. I'm puzzled.

  Is that what you are looking for?

  $dcName = 
  Get-Datacenter -Name $dcName | Get-VMHost  | %{
       $esx = $_
       $_ | Get-VMHostNetworkAdapter | `
            select @{N="ESXname";E={$esx.Name}},DeviceName,Mac
  }
  

  ____________

  Blog: LucD notes

  Twitter: lucd22

• BEFSR81 v3 MAC address filtering

  I have a simple network configuration with wired computers connected to the router and the router connected to the modem.

  My goal is to associate the IPs assigned to MACs. So if I have 4 (A, B, C, D) computers connected to the router, it assigned a specific IP address. If someone disconnected a computer to replace it with their own, the router would recognize the MAC change and could not allow the connection.

  I know that the router can filter certain IP or Mac addresses from the internet, but some evil doer who simply unplug the computer to plug its own would still have access to the local network. That and I have no way of knowing what would MAC the author.

  So far, I have configured my computer to request a static IP (192.168.1.2-5) and the DHCP Server give the rest (6 to 254). Then the IP filter is on the DHCP range to block those from the internet.

  But as I said, I need these completely blocked IPs. Also. If a user connects to a computer windows laptop and guess the static IP address, then the router fortunately would give him access to everything...

  Sorry, I know it's confusing. Bottom line is I have to let only specific Mac to connect to the network. Or SOME form of protection for the cable networks... Super sticky ethernet cables is not an option, although it would solve the problem.

  nicfortin1342 wrote:

  My goal is to associate the IPs assigned to MACs. So if I have 4 (A, B, C, D) computers connected to the router, it assigned a specific IP address. If someone disconnected a computer to replace it with their own, the router would recognize the MAC change and could not allow the connection.

  Cannot do this with the BEFSR81 and it is not a matter of how it is recent - the firmware just does not support, does support an address IP or MAC, some of them not allowing not blocking.  I think that it has been designed as a primitive, rather than a security measure parental control.

  With DHCP servers better (like those of most of the firewall) than the BEFSR81 has, you can configure DHCP to "static maps" so that the lease of the intellectual property will be distributed based on the MAC address, and which would you allow to adjust things until only the DHCP leases to some MAC addresses issue.

  Despite this, MAC addresses can be manually changed and spoofed, such as IP addresses, so neither is really a good measure of security.

  You have to ask in the BEFSR81 firewall features, which, instead, is simply a router.

  In the grand scheme of things, because the MAC and IP addresses can be spoofed, if someone can get physical access to your network, you are pretty well watered unless the traffic is encrypted.

  Russ

• Back to 'mac address cloning.

  My latest issue of 'mac address cloning' has been resolved, but now I have another. Before, I had to reset my router to turn off and reset everything and it worked. Now I have to activate "clone mac address" to get my pc and the server let me contact them (thru 'MSTSC') with my wireless laptop and then I have to disable it to get on the internet. Is there a way for the pc and the server to be reset and start fresh?

  It is most likely a name resolution problem. When you don't have the address cloned MAC and you ping dan - pc, do you have the answers?

  Unless you have a server configured on your network, WINS all of your PCs have static on the router DHCP leases, or if you run your own internal DNS server, or if you have the file for all of your internal machines LMHosts entries, it is unlikely that you will be able to be able to resolve the names of the computers on your local network.

  Probably the easiest way for you is to refer to their IP address. If you have changed the port they listen to on, so you can access separately from outside your network (when you're not home for example) you must add this airport number to the IP address in the input address mstsc block, IE 192.168.1.10:3389 for them and 192.168.1.11:3399 for the other (this is for example... I don't really know the IP addresses or ports that you used...