IP pool to mac address

is it possible in a remote access VPN to give the same IP to a client as they connect and pool the address from th IP pool?
I was thinking like a DHCP server where you can tie a mac to an address, is it possible with a pool?

Hi,
You should be able to assing the user the same IP address based on their "username" configurations on an ASA atleast. That is if you are using the local AAA on the device you are using for VPN Client connections but I am not sure what device and what type of configuration you are using.
- Jouni

Similar Messages

Hyper-V MAC addresses

Hi,
I understand that each Hyper-v node in a cluster will have its own dynamic pool of MAC addresses that should be different between them. When a VM is started on a node it gets a MAC from this pool, if it's moved to another node and restarted it will get a
new MAC from the pool on that node. This is a concern for me as I don't want MAC addresses to change when VM's are restarted on different nodes, besides statically assigning a MAC address to EVERY single VM (which could be a fair few with the amount you can
host these days) is there any easier way to ensure once a VM has a MAC then it will always retain that MAC regardless of which node it is restarted on?
I am running Server 2012 R2 as the hyper-v host if that makes any difference.
Many thanks
Steve

Hi,
With Hyper-V you can configure a virtual machine to use a dynamic or a static MAC address for any given network adapter.
The default option is to use a dynamic MAC address – which means that Hyper-V will generate an initial MAC address for the network adapter, and it will regenerate the MAC
address if it believes it is necessary.
If you use static MAC addresses you need to manually specify the MAC address to use, but Hyper-V will never change it.
More information:
Hyper-V and Dynamic MAC Address Regeneration
http://blogs.msdn.com/b/virtual_pc_guy/archive/2010/05/14/hyper-v-and-dynamic-mac-address-regeneration.aspx
Hope this helps.
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VMM 2012 R2 - Default MAC Address Pools

We have two VMM servers at different sites but on the same network subnet.
Having deployed virtual machines from both VMM servers we have experienced a number of instances where the same MAC address has been allocated to more than one virtual machine (same MAC allocated by each VMM Server).
Consequently, I would like to split the current Default MAC Address Pool range and allocate half to each VMM server.
The documentation suggests that the current "Default MAX Address Pool(s)" should be deleted before the new custom pools are created.
We have already deployed a large number of virtual machines from each VMM server.
Does the deletion of the "Default MAC Address Pool(s)" have any impact on the existing virtual machines with MAC addresses assigned from the default pools?
Will the virtual machines retain there existing MAC addresses or will they be re-allocated new MACs?

Does the deletion of the "Default MAC Address Pool(s)" have any impact on the existing virtual
machines with MAC addresses assigned from the default pools?
Kind of, you cant delete the "Default MAC Address Pool" while VM's have allocated MAC's.
You can revoke MAC's using the "Revoke-SCMACAddress" cmdlet
Will the virtual machines retain there existing MAC addresses or will they be re-allocated new
MACs?
I would probably choose to first give the VMs MAC addresses from the new pool, then delete
the default pool.
You will need to grant your VMs with new MAC addresses using the Grant-SCMACAddress
cmdlet.

Virtual MAC-Address on Solaris 10 update 9

Hi,
i'm installing Solaris 10 update 9 on UCS B-Series (B230 M2 or B440 M2) with M72KR-Q Adapter. We create the Service Profile with vNIC associated to vNIC Template. The vNIC Template use the MAC Pool Address configurated.
When we run ifconfig -a on Solaris we can view only the original MAC-Address instead of Virtual MAC-Addres. Is this correct?
Thanks in advance

When you say the "original" MAC are you referring to the Hardware Default?
Ensure your MAC pool has available addresses also. You can also test unbinding the vNIC template from the Solaris service profile, and manually assigning a MAC address (watch for overlap) to the vNIC and see if that pushes to the solaris host.
If that works, then you have a pool/template issue. If not, we'll need to investigate further.
Regards,
Robert

WRT54GS: without Windows, force a given MAC address to always get the same IP address via DHCP?

I have just now set up my WRT54GS to manage my home wireless network, and it works great. I just have one question that I haven't been able to find an answer for (forgive me if I have overlooked an obvious source of information).
I have set up the WRT54GS to be a DHCP server, and it assigns addresses in an ad hoc manner to all the devices that connect to it. In general, this is what I want, but in one case, I want a certain host to always get the same IP address, for example, 192.168.1.10.
You should know that I have no Windows machines on my network. Everything is either running Linux, MacOSX, or Symbian (on a Nokia N95 handheld). Therefore, I can't set up a static IP for my device using the software supplied on the CD that comes with my router, as that software only runs under Windows.
Using a different manufacturer's router, I am able to accomplish this by telling the DHCP software on that router to always assign 192.168.1.10 to the host who connects with a certain MAC address. I can then use this mechanism to force my specific host to always get this desired IP address. However, I haven't been able to find any way to do that with the WRT54GS without the software on the Windows-based CD. Is it possible at all? If I can indeed do this without that Windows software, could someone point me to some docs which explain how to accomplish this?
... or is there perhaps a different way to cause this to happen, perhaps by means of some sort of DHCP client ID?
Thank you very much in advance for any pointers you can give me.
Message Edited by HippoMan on 10-16-2007 05:27 PM
Take a hippopotamus to lunch today.

Forget about the CD. There is nothing on the CD which you don't configure better through the router web interface at http://192.168.1.1/ You don't need the CD. Never. I have never used the CD to configure any of my routers. The program on the CD is just a software which helps you with the initial configuration of the router. It is just a software which pretty much contacts the web interface in the background and sends some settings changes there. You can do everything yourself directly. Then you know what you change.
You have to configure the static IP address on the computer and on the computer only, e.g. on your Mac use Static IP instead of DHCP in the network preferences. Enter the IP address you want to use for the computer, the subnet mask, gateway address and DNS server(s). That's it. The router is not involved in any of this.
You just have to make sure that you use an IP address inside the LAN of the router. By default, Linksys routers use the IP address 192.168.1.1 on the LAN side for the the router. The subnet mask is 255.255.255.0. The IP address together with the subnet mask says that all IP addresses 192.168.1.0-255 are considered part of the LAN. Everything else is outside and needs to be routed to the router and from there into the internet. (If you want to know how the subnet mask works exactly read the wikipedia article on it or search for "subnet calculator" or similar in the internet)
Thus, if you connect a computer to your LAN and set a static IP address on the computer it should be inside this IP address subnet/range in order to have internet and LAN access on the computer. It does not matter which address you use as long as it is inside the IP subnet. The DHCP server on the router automatically assign a correct IP address inside the IP subnet and also automatically assigns the correct gateway address (its own address = the address to which everything should be sent which does not belong into the LAN, i.e. the internet traffic) and the DNS server. With static IP you have to assign those values yourself.
But again, there is no Windows computer or CD involved to do that nor is there any configuration on the router required to set the static IP address on the Mac. The IP address you set must simply match your LAN IP which is basically defined through the settings on the router as you want to have internet and thus need access to the router and its address 192.168.1.1.
Some routers allow you define fixed IP addresses for specific devices in the DHCP server of the router. With that function you can set a fixed IP address on the router. The computer can remain on DHCP. It will always get the IP address you have configured in the list on the router through the DHCP server. However, your Linksys router does not have this option. If any device inside your LAN is supposed to receive the same IP address at any time you have to configure that on the device only.
If you have not changed the default LAN IP address, subnet mask and DHCP server settings on the router, the router has 192.168.1.1, subnet mask 255.255.255.0 and the DHCP server uses 192.168.1.100-149 for dynamic assignments. To avoid potential address conflicts you should not use any static IP addresses inside the DHCP server address pool. This leaves you with IP addresses 192.168.1.2-99 and 150-254 as static IP addresses inside your LAN. You can pick any address you like as long as any device with a static IP address has a unique IP address inside your LAN.
Assign the subnet mask 255.255.255.0 on the computer and set the default gateway to 192.168.1.1. The DNS servers are a little bit more complicated. Generally it is better and faster if you use the DNS servers of your ISP. You can, however, also use the IP address of the router 192.168.1.1 as DNS server. The router will then operate as DNS proxy, i.e. it contacts the DNS servers of your ISP for any request from your computer.
If you want to use the DNS servers of your ISP, click on the Status tab in the router web interface. It shows you the current settings of the router on the internet port. It should show you multiple entries for DNS servers. Choose those DNS server IP addresses in the computer.
If you don't want to go through the hassle with the direct access to the DNS servers of your ISP, simple use 192.168.1.1 as only DNS server on the computer.
There are all settings you have to make on your Mac or other computers to assign a static IP address. As long as the IP address is inside 192.168.1.* it belongs to the LAN and has internet access through the router (as long as the default gateway address is 192.168.1.1 of course).
Firmware is loaded either through the web interface of the router, usually somewhere on the Administration tab or with tftp. Both ways work fine on any Mac or Linux box.

Hyper-V on Windows 8.1 is messing with MAC address when sharing my Wifi card

Hello,
I'm using Hyper-V on Windows 8.1 to build a complete SharePoint Development environment.
All of my VM are following this scheme:
a "local" private network shared between the host and all VM, using a static IP address plan (192.168.10.0/24)
a RJ45 external network, attached to my physical ethernet card. This network uses DHCP protocol
a WIFI external network, attached to my wireless network card. This network also use DHCP protocol
When plugged on the ethernet card, I have no issue. Both the host and the guest OSes are getting a valid IP address.
However, when I try to connect on the wireless card, I get some weird errors. Actually, my guest OS are getting the same IP address than the host. This issue an IP address conflict.
Someone else got the same kind of behavior : Windows 8.1
Hyper-V : IP address conflict on Guest OS
I've checked my MAC address plan, and it seems correct.
Using WireShark (a tool I'm not used to I admit), I can see that all DHCP request of the guest os, are sending the host MAC address, and not the guest' one.
Does anyone have an answer to this weird behavior?
Thanks,
steve
Paying back the community for its help by writing articles :
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Hi Steve,
Please try the following step and then retry ipconfig /renew in your VM :
1. Configure the WI-FI router to assign a static IP address to the host’s wireless network adapter(the IP should not be in DHCP Pool).
2. On the host, configure the wireless network adapter to use a static IP address. The IP address will be the same address configured in step 1.
3. Using Hyper-V Manager, create an external network switch that is bound to the host’s wireless network adapter
Hope this helps
Best Regards
Elton Ji
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Hi Elton,
First of all, thanks for your effort.
I will try your suggestion, but even if it works, it won't solve the actual root the issue.
Moreover, it is only relevant if I can control every wireless network I'm connecting to. What about if I travel and I connect with a customer wireless network? what about an hotel wireless network?
As I said, wireshark shows me DHCP requests using the wrong IP address. I strongly believe there's a bug somewhere between the wireless card driver and Hyper-v Mac-Bridge service.
Steve
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DHCP via Mac Address

I have a Cisco 831 router. I am handing out DHCP to my network via the router
ip dhcp pool HmPrivate
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 192.168.1.20
domain-name hmprivate.net
What I am trying to do is assign the same ip address to my laptop via DHCP by associating the mac address of the laptop to the DHCP ip address. This is easily done on a windows server.
I have not been able to figure it out on this router though. I have looked at the commands under the pool as well as in config mode. Nothing is jumping out at me.
Any assistance is greatly appreaciated!

Ok I powered up my laptop got an ip address from the rtr of 192.168.1.21. On the router i did a sh arp to get my hardware address of 0015.0025.60aa. I then created the new DHCP pool for the static entry. From my windows laptop i do an ipconfig / release then a ipconfig / renew. I keep getting the 192.168.1.21 address and not the 192.168.1.13 address that I want.
Am I missing something really simple here? Why wont the laptop grab the 192.168.1.13 address?
ip dhcp pool HmLaptop
host 192.168.1.13 255.255.255.0
hardware-address 0100.1500.2560.aa
default-router 192.168.1.1
dns-server 192.168.1.20
client-name dhopewell2
Here is a list of all DHCP pools on my router.
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.1.1 192.168.1.10
ip dhcp excluded-address 192.168.1.250 192.168.1.254
ip dhcp excluded-address 192.168.50.1 192.168.50.100
ip dhcp excluded-address 192.168.24.1 192.168.24.100
ip dhcp pool HmPrivate
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 192.168.1.20
ip dhcp pool HmWK
network 192.168.24.0 255.255.255.0
default-router 192.168.24.1
dns-server 10.0.101.12 10.0.101.13
option 150 ip 10.200.1.50 10.200.1.51
ip dhcp pool vlan10
network 192.168.50.0 255.255.255.0
default-router 192.168.1.1
dns-server 192.168.50.20
ip dhcp pool HmLaptop
host 192.168.1.13 255.255.255.0
hardware-address 0100.1500.2560.aa
default-router 192.168.1.1
dns-server 192.168.1.20
client-name dhopewell2

RV016: PPTP Server and "Block MAC address"

So if the PPTP server is enabled, and "Block MAC address not on the list" is enabled under the DHCP settings, will the PPTP client get an IP address?
Similarly, if the PPTP server is enabled and the range of IP addresses configured on the PPTP server screen is outside the IP range of the router due to a subnet mask (like 255.255.225.248 for example), will the IP still be assigned to the PPTP client? If assigned, will that IP have any connectivity to the LAN?
Thank you in advance for any answers!
Huntsville's Premiere Car and Bike e-magazine: www.huntsvillecarscene.com

So here's how PPTP works with these two features:
1. The PPTP IP range is a different range than the DHCP range. You get an error message if your PPTP IP range overlaps with the DHCP one.
I didn't test the 'Block MAC' function because since the IP isn't coming from the DHCP pool, I highly doubt any MAC blocking will work.
2. Since your PPTP IP address range is outside of the DHCP range, this point is completely taken off the table. However, if you choose an IP range that's outside of the subnet, you'll get an error message when saving. I also learned that if you set the PPTP IP to just a single number and connect, the router will automatically reject any additional connections since no IPs are available.
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NATing to the virtual MAC address of an HSRP group problems...

Hello
I have a problem where I need to NAT various IP addresses, and need the NATd addresses to carry the virtual MAC address of the HSRP group on the onward travels..
By default, with the Cisco 871's I'm using, the packets are NATd, but carry the MAC address of the external interface.. not the virtual MAC address.
The problem is that when I failover to the standby 871, the packets will then have the MAC address of the standby (new active) 871. This causes problems because my next hop doesn't update its ARP tables (very infrequent updates).
The next hop will accept packets NATd by the standby (now live), but will continue to send reply (eg ICMP) to the live (now standby) because it hasn't updated its ARP table.
I know that I can create a NAT pool with the virtual IP address as the only member of the pool. Packets will then have the virtual MAC address, and the problem will be fixed, but if I need to NAT IP addresses to *different* NATd addresses, then I would have to create multiple HSRP groups, with different virtual IP's and MAC's, and then create multiple NAT pools...
If I can't get my next hop (which I have minimal control over) to refresh/update it's ARP table, then I will consider the multiple HSRP group config, but before I try that I would like to know whether I would be able to have multiple virtual IP's and MAC's on a single interface. Apparently there was a problem with the Catalyst 2500/4500 series where the same MAC address would be used for all HSRP groups, and you had to use burned-in MAC addresses for HSRP groups.. which wouldn't provide a solution in this case..
Any ideas on how to fix this would be greatly appreciated. BTW I have proxy-arp on external interface, and gratuitous arp.
My software version is:
Cisco IOS Software, C870 Software (C870-ADVSECURITYK9-M), Version 12.3(8)YI1, RELEASE SOFTWARE (fc1)
Synched to technology version 12.3(10.3)T2
Many thanks,
Michael Blake.

Hello Michael,
you might want to have a look at the documents below, describing two techniques developed for the problem of NAT in an HSRP environement:
NAT Stateful Failover of Network Address Translation.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t13/ftsnat.htm
NAT Static Mapping Support with HSRP for High Availability
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t4/ftnthsrp.htm
Regards,
GP

How to make mac address gmail contacts overwrite the ones on my HTC Android phone - I don't want to sync - that makes the phone scramble and overwrite my computer. I want to remove or correctly overwrite the phone information as I have done with iPad.

Please help - I am beginning to hate google, my android and gmail. I have just wasted about 5 hours in a futile attempt to try and get my current Mac contacts list on my computer updated to my phone. I'm not that computer literate but I have looked up about google phone accounts, vCards, backing up contact lists, what SD on phones are, and God know what else. I have searched the internet and tried all sorts of things and I still have a mac with a now correct contact list (after the iPad contacts scrambled it and I spent ages manually correcting them all) and a phone with an outdated contact list. If you try and sync them the phone wants to overwrite the computer one just like the iPad did (would it be so **** hard to give you a choice on the phone as to which overwrites which!). After all the advice on the internet failed, I got the bright idea to completely delete all the ones on the phone and if it was empty of contacts the computer one could be exported to it. Not as simple as it sounds. First I backed up (I think) my computer contacts list. Numerous futile attempts to go through the phone options to globally delete all contacts did not work - they gave a warning message and you got to choose whether to continue or not, I did, and it looked like it might be working as it changed to zero data on the phone, but then they all popped back up again from God knows where from, but without their little added bits like pictures of the people. So, I tried un- syncing the darn phone from google and then deleting them globally. That didn't work either. I tried deleting them all again and again and google would crash and not let me do it. It is absolutely ridiculous that this is so damned difficult to do (especially if you are not computer savvy) and that you cannot choose which device overwrites which when syncing. I gave up and ticked sync with Google again (not that it appears to do anything to the phone contact list at all). So after 5 hours I am back to where I started from, with a phone showing all the same incorrect contacts (but the pictures are back), which wants to overwrite the computer if I try any sort of sync, and no way to fix them except go into each one manually and try and do it - and how long would that take (and I've already wasted hours and hours fixing scrambled contact lists!). I think I will do a print out of the computer contact list and just carry it around with me like an address book - so much bloody simpler. So now I have a headache, am fighting an overwhelming urge to hurl the phone at the wall, hoping for a heat wave to evaporate icloud things and am wishing I had bought an iPhone instead of the stupid HTC Android. Can any one offer me any suggestions on how to get rid of the contacts on my phone and replace them with the ones in my mac address list - hopefully after that they can sync to their hearts content and not stuff everything up again (which was why I unsynced google a while back - because the phone's list kept making stuff ups and scrambling and duplicating my computer contacts list). Am I the only one on the planet having this problem or is there someone else out there who has had it and solved it.

Without "pretending" to be yourself on the other phone (change settings) there's nothing else you can do.
iOS devices are meant to be single user and can't view iCloud.com the same way a Mac or PC can do.
You need to find a desktop or laptop machine (Mac or PC) to log in at iCloud.

I want to reserve a static IP address on my Airport extreme. What is the difference between reserving by MAC Address and DHCP Client ID?

I want to understand the differences in the way you can reserve a static address for a device on the network. I had previously set the device itself to an address and then reserved it with DHCP Client ID, which I thought was just the devices static addresss. I'm not sure if this was in fact correct or just happend to work. I know what a MAC address is, but I'm not really sure what the DHCP Client ID is. So it would be great if someone could clarify it, and the difference between reserving address by MAC Address or DHCP Client ID.

A MAC address is a unique identification consisting of letters and numbers in a form that looks like this:
xx:xx:xx:xx:xx:xx
Every network device has a MAC address, which can be found on a label on the bottom or back of the device. Apple calls this the Ethernet ID.
A DHCP Client ID is an optional name that you can assign to a device. For example, on your Mac....
Open System Preferences (gear icon on the dock)
Open Network
Click on Ethernet
Click Advanced at the lower right
You may be able to edit the DHCP Client ID here....for example.....you could enter MJ500's MacBook in the space provided. That would be the Client ID of your Mac.

I have two .mac addresses; how does this work in iCloud?

This is not about consolidating Apple ID's... I think.
When I got my first .mac address, I thought I picked a good one at the time. Later on, due to the peculiar spelling, I opted for an additonal (paid) address which I use every day. Now the first one (which is an Apple ID) contains my calendars, contacts, etc. I never use the email portion of it, again because of challenging spelling. The second .mac address (also an Apple ID) is an email only account. This is the email account I use daily.
When I make the transition to iCloud, I intend to keep my original AppleID (from the pre-.mac days) as my iTunes store ID.
My question is, what happens with my two other accounts?
.mac #1 with the contacts and such would move to iCloud and sync everything there as it currently does with MobileMe. Since .mac #2 is an email only account, would I even need to bother moving it to iCloud (if that's even possible), or would I just keep using that as email only using the current mail settings on my iThingys and Mac? Does anyone know if .mac #2 will live on after MobileMe vanishes, or will I loose my daily and coveted .mac email at that time?
I'm sure Apple has a good reason for not allowing us to just consolidate everything in one place, but I know there are many out there with a similar situation to mine.
I've spent a good deal of time tonight searching the various threads and can't seem to find an answer to the two .mac email dilemma. My appologies if it's already been discussed.
To sum up, I have one Apple ID that I use for iTunes and intend to keep as such. I have two .mac addresses which are also Apple ID's; one that syncs with MobileMe and one that is email only. I would like to use iCloud to sync what is currently on MobileMe, AND continue to use the simpler email address that I've been using for years.
Am I screwed??
Thanks in advance for your help, and Happy Holidays to all!!

Migrate the account which contains your calendars, contacts etc. first, at http://me.com/move and set it up on your Mac and devices.
http://www.apple.com/icloud/setup/mac.html
Now migrate the email-only account in the same way. On a Mac you can add it in System Preferences>Mail, Contacts & Calendars - it won't sync anything but will be added to the accounts in Mail where you can then use the email in the normal way.
I don't know what the equivalent process on an iOS device is; very likely you need to add it as an account in the Mail app.

How to find a workstation object by ip or mac address?

Hi gang.
I'm trying to search for a workstation object by mac address or by IP
address. So far, I'm not able to find the correct attributes to do so.
Can anybody point me in the right direction to find a workstation by either
IP or mac?
thanks!
John

[email protected] wrote:
>
> Hi gang.
>
> I'm trying to search for a workstation object by mac address or by IP
> address. So far, I'm not able to find the correct attributes to do so.
>
> Can anybody point me in the right direction to find a workstation by either
> IP or mac?
In ConsoleOne find, advanced, look for ZEN:INV IP Address attribute
-sk

How do I add my phone's Wi-Fi Mac address to my home server so that I can use my home Wi-Fi with my phone?

Hello. I am using an Android cell phone and, though the phone sees my home server name and accepts my password, it won't connect. I understand that I may have to add my phone's Wi-Fi Mac address to my home server in order for it to allow my phone access, but I have no idea how I might do that. Could someone help me with this? Thank you.

Tdalso wrote:
How do I add a phone number so I can use either my US or Canadian number (depending on where I am) with iMessage and Facetime on both my iPhones?
You need to log out of iMessage and Facetime, make sure your number is correct in Settings/General/About, then log back in again to send a new activation request.

I need to change the MAC Address for Airport on MacBook

I have a specific need to change my son's Airport MAC address as his school requires the use of USB network cards that aren't compatible with MACs. These cards are needed because the school's router uses MAC address filtering.
Before we upgraded his Mac to Snow Leopard, we were able to change the MAC address to the MAC address of the useless dongal the school supplied. We basically created an AppleScript program that ran the "sudo ifconfig en1 ether xx:xx:xx:xx:xx:xx" and all was good.
This command no longer works for changing the MAC address. We tried it as root user as well and by typing it into the terminal window as root. After running the command, we can run "ifconfig en1" and it does display the new mac address but when we turn the airport on and try to connect, it just hangs and won't connect.
Our other non-Snow Leopard still works fine after running the commands so I'm guessing Apple disabled this functionality. It's hardly a security issue by being able to change your mac addres.
Is there a new way to accomplish this? I've searched everywhere.
Thanks!

Would an easier solution be to provide the school's IT admin with your mac address and have it added? If they can add a block of mac addresses for the usb dongles, they can add more for machines that cannot use the dongle.
Also: "It's hardly a security issue by being able to change your mac address."
While it may not be a security issue for your machine, it is a security for the school network who is using mac address filtering as hopefully only one part of their wireless security.
That being said, have you read this?
http://osxdaily.com/2008/01/17/how-to-spoof-your-mac-address-in-mac-os-x/

IP pool to mac address

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