Bandwidth limit for MAC addresses

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• What are the optimal values for mac and arp timeout values

  Hi guys.

  What are the best values for 'mac address-table-time of ageing' and "arp timeout" by following scenarios? :

  -single sg300-10 as hosts Layer 3 - with a maximum of 10 local switch (directly connected)

  - and a 3750 x-stack with 100 local hosts + hsrp with a battery of the same kind

  or for asa 5520 as internet gateway for 500 customers?

  I use now a time of aging mac 300 seconds and a time-out of the arp of 3600 seconds.

  Is - this okay.?

  Thank you.

  These values should be fine. I don't know why the switch is layer 3 since you have of the 3750 and the ASA5520. If you start to see overflow errors, you should consider using the layer 2 switch.

  -Tom
  Please mark replied messages useful

• Find Mac address duplicated on VC

  Hello:

  I wonder how I can check for Mac address duplicated on the virtual machines under VC.

  Basically, I want to run the script that will tell me if there are any duplicate Mac addresses exist.

  I know how to find mac on VM (I use $vmMAC = $vm |) Get-NetworkAdapter | Select MacAddress), but are struggling to compare with a different Mac address without loop a whole script.

  Thank you.

  No, $macTab is defined as a table of hash on the first line.

  It could be that the MAC address is not available on some guests.

  Try the next version, I added a Where-Object to eliminate expectations of customers.

  $macTab = @{}
  
  foreach($vm in Get-VM){
      Get-NetworkAdapter -VM $vm | where {$_.MacAddress} | %{
          if($macTab.ContainsKey($_.MacAddress)){
              Write-Host "Duplicate MAC address" $_.MacAddress "in" $vm.Name "and" $macTab[$_.MacAddress]
          }
          else{
              $macTab[$_.MacAddress] = $vm.Name
          }
      }
  }
  

• WLAN Access Denied for active MAC address in the ACL

  I have a pretty great list ACL (Access Control) and I've never had a problem with it in the past, but I just got a new laptop and same computer when I save the MAC address and reboot the router I always get the "WLAN Access Denied" error for access from your laptop.

  I did all the "sanity checks" to ensure that the password is correct and that other devices still work.

  I had the MAC address of the laptop the same way, I always have, I see the MAC address in the Logs in the access denied message and copy it from there, in the access list. I did it with more than 20 other devices successfully, I'm not sure what is different about this one MAC address... I confirm through ipconfig on the laptop that the MAC address I use is correct.

  When I turn off ACL, I can connect without any problem of the laptop.

  Any thoughts? I am very familiar with computers and you can do an advanced troubleshooting, I do not know infrastructure and networks of the stuff so I don't know where to start here.

  Any ideas on how I can fix this would be appreciated!

  You may have hit a limit of the ACL. A test, remove a device from your list and see if your laptop will connect. This would confirm if you have contributed the most to list ACL on the router...

• New version of Thunderbird grabs all Mac addresses Mail instead of simply treat associated with the email for Thunderbird account. Why?

  Old version not shown contacts associated with the email address associated with Thunderbird. New version captures all THE addresses listed in my Mac Mail address book program. Is a huge list if I'm looking for an address or a specific person. A real pain! Any way to stop this?

  Problem solved. Just say Thunderbird is not to use this address book. All back to normal now...

• where can I find the mac address for Airport Extreme

  just bought a new Airport Extreme 802.11ac and I don't know here to find the MAC ADDRESS. Can someone tell me where to look. I have the model and serial number, but can not find the MAC ADDRESS.

  Is the AirPort Extreme, set up and operation right now... even if he could not have an Internet connection?

  If Yes... Open the AirPort on your Mac utility... (Finder > Applications > utilities > AirPort Utility)

  Hold down the option key on your Mac when you double-click on the image of the AirPort Extreme

  The next page will display a summary of the parameters

  The AirPort Extreme has done 3 different MAC addresses... Ethernet, WiFi 2.4 GHz and 5 GHz WiFi.   If your AirPort Extreme is connected to a modem by an Ethernet cable, then the Ethernet ID is the MAC address.

  If the AirPort Extreme has not set up yet at all...

  Open AirPort Utility as above, and then click the file menu in the upper left corner of the screen next to the Apple icon

  Click on configure the other

  For address, enter 10.0.1.1

  A password is normally not necessary, but if you are prompted for a password, use the word

  public

  Click OK, the settings summary page is displayed.  In most cases, given that the AirPort Extreme connects to a modem via an Ethernet connection, you want to use the Ethernet ID as the MAC address.

  If you are still experiencing difficulties, you have 90 days of support Apple phone. Call them and maybe they can explain why that should be a very simple task is so difficult.

  Contact - Support official Apple

• I get a strange behavior of the bar tabs and the address bar in Firefox 29,0 for Mac.

  I just installed Firefox 29,0 for Mac.
  I have a strange behavior of the bar tabs and the address bar with this new version.
  Instead of the address bar, I get two rows of symbols. And it is impossible to write anything in the address bar.
  (I add a screenshot, but I can't find a way to do it).

  Firefox has an RSS icon in the palette of the toolbar that you can drag a toolbar (but not on the location bar container).

  • Firefox menu button > Options/Preferences > toolbars
  • View > toolbars > customize

• MAC address for stream hp 7

  Where can I find the MAC address on this Tablet? It works under windows 8.1. Thank you.

  for my stream8 should work for the stream7.     Charms > change PC settings > network > wireless

  Physical address = MAC

• LaserJet MFP M477 cold Pro: MAC address for LajerJet Pro MFP M477 cold

  Could you please tell me where I can find the MAC address for LaserJet Pro MFP M477fnw?

  Hello Letitial

  The Mac address is simple to find 2 ways

  1. Go to the antenna wireless icon on the upper right of the screen and tap on it.
  2. Then press the Wifi network (On - Off) icon.
  3. Do scroll down and find the hardware address.

  That s how you get the Mac.

  The other way would be to print a configuration report and search for hardware addresses.

  • Drag the menu to the left
  • tap Setup
  • tap reports
  • Select configuration report.

    I hope this helps you!

• TZO refuse my request for accommodation once I insert the MAC address of my camera!

  I tried to register with TZO for the first year, which comes for free! After I insert number of MAC address of my camera, I get an error message on the site that says: -.

  "

  There is an error on the previous screen.

  A trial has already been created for this Mac address. Please enter the Mac address with care.

  Click back to make corrections

  ".

  I never tried to register with TZO before yesterday. Despite having bought the camera in January this year. There is nowhere I can see the TZO site to communicate with them, but in any case it is the Linksys who sold me the service. Anyone have any ideas on how to solve this problem?

  All responses welcome.

  Thank you.

  MB

  If you go to the TZO site, they have a page about us, check for contact information.

  Click on the link below and that you'll get there if you do not

  TZO About Us Page

• Find the MAC address for DesignJet T2500

  As the title says, looking to understand how to find the MAC address on a T2500 DesignJet.
  Thank you!

  Hello

  The best way to get it is from the front panel of the printer connected to the net: main Menu > connectivity > network Conenctivity > information network

  Of the EWS: networking > Configuration Page > hardware address

  OR, if you have the printer IP address,

  on the command prompt, use the command bow - one, look for the IP address of the printer. you will find the IP address on the right

  I hope this helps

  Best regards

  Mike G

• IP Phone Dot1x - database MAC addresses for the configuration of MAB

  Hi all

  I need to configure the MAB for IP phones on the ports that are active dot1x

  Can I keep the MAC address of IP phones elsewhere then on internal hosts of GBA?

  It is possible in the ad or something similar...?

  Kind regards

  Georges

  Hello

  You can use your AAA Watt database server racks until you set the mac addresses as users on these databases.

  Remember that the mac address and the password are the same and must match the format that it receives in the RADIUS access request.

  Example: If the AAA client (switch) sends the mac address of the format xxxxxxxxxxxx, and then you create the user with this format.

  If she sends in the xxxx.xxxx.xxxx format, then you must create the user in this way.

  Usually, he sends in the format xxxxxxxxxxxx, but worht to ensure.

  HTH,

  Tiago

  --

  If this helps you or answers to your question if it you please mark it as 'responded' or write it down, if other users can easily find it.

• Where's MAC address for HP Color LaserJet CM3530 MFP?

  I can't find the MAC address (hardware) for the HP Color LaserJet CM3530 MFP.  Curiously, it is not on the configuration page.

  Run the network settings page.

• How to find the MAC address for photosmart c510 - printer, not zineb

  HP Photosmart c510 all-in-One

  Windows 7 SP1

  Printer bought 2 weeks ago.

  Printer wireless light is not on, not even flashing

  I use MAC address filtering on my home wireless router.  No problem adding the Zeen, I found that it is easy MAC.  Of course for the printer, it says "Printer not available" on the display of zineb, just below the zitoun MAC address.

  So I need to add the MAC address of the printer to my router.  I know that I can turn off filtering by MAC address and I hope that the printer connects, and then I can print the printer network settings, get the MAC, and then again turn on the filter and add the printer Mac

  Is this the ONLY way I can get the MAC address of the printer?  I'd rather not have to do that whole process, but will if I have to.

  I also wonder why the printer wireless light is not even blinking as he is looking for a network.

  Can anyone help?

  Print a network Test Wireless in the network menu on the front of the printer. It will contain the MAC address. Note that MAC filtering is not in that ensure that used MAC addresses are sent in the clear, and it is easy to impersonate a MAC address on a computer.

• Unique mac address of guaranteed for a VM on an ESX?

  Hello

  Please can someone help me understand how the ESX (i) ensure a unique virtual computers mac address assignment to the host.

  for example, let's say that if I have a virtual machine with the address mac x, then how do I gurantee ESX me it won't any other virtual computer with the same mac address in the same ESX host.

  Also, any idea on how these mac addresses are assigned to the VMs. is it a MAC common address by ESX resource pool?

  Thank you.

  If your ESX is managed by vCenter, then the MAC addresses are assigned from a pool that she maintained.  The vCenter monitoring assignments, and a duiplicate should be detected during VM startup (as a result of a clone to the virtual machine, for example), then a new MAC address is assigned to the pool.  Each vCenter has a unique ID, and so your vCenter have different unique ID they will not affect the same MAC

  It is possible duplicates to happen, if you have deployed masses of the VM vCenter pool can run out (not sure what the size of the pool is) and re - get used to MAC (but if you have masses of machinery the chances of both MAC duplicate appearing on the same subnet are probably very thin)-see http://kb.vmware.com/kb/2006344.  In addition, if you manually assign MAC addresses, then I think not that the vCenter will search for a duplicate of the one at boot time.

  I guess that standalone ESX work pretty much the same way, maintain their own pool tio divy out ot VM MAC, using their unique ID to ensure that two ESX do not have the same basins.