Mac Asking For Dhcp Client Id

  1. Mac Asking For Dhcp Client Id Google
  2. How To View Dhcp Client List

It said some ISP’s require the client-id field of the DHCPDISCOVER request to be filled. Hoping for an answer, expecting to be disappointed I called my ISP to see if they required the client identifier to be set to the MAC address. Static IP Address. How to get one. This page describes how to assign a 'Static IP' to your local computer. If you are looking to get an external static IP, that is; a static IP for your whole internet connexion; see the notes at the foot of the article for more details, and also this post. Greenieofdubbo writes. I'm looking at the Netcomm NP203's. Anyone used them? This week we are going to order some of the Jaycar/Electus ones, which I am pretty sure from the photos are the same as the NP203's (single port module), or we will order the Netcomm NP203, just hasn't been decided which yet. DHCP Setting in Mac OS X [closed] Ask Question. 'The IPConfiguration agent implements the client side of the DHCP and BOOTP protocols described in RFC951, RFC1542, RFC2131, and RFC2132. It also assigns and maintains static IP addresses.' Why are DHCP request and acknowledgment messages broadcasted and not unicasted?

How do i find my dhcp client id
You can start with your Mac by opening System Preferences and the opening Network. Click on AirPort on the left to highlight it and then click Advanced at the lower right.
Click the TCP/IP tab
Look for the DHCP Client ID area
Type in the name you want. Example, +MacBook Pro Wireless+
Click OK, then click Apply
Open Network back up again and click on Ethernet on the left to to highlight it
Click Advanced at the lower right
Click the TCP/IP tab
Locate the DHCP Client ID area and type in the name you want, +MacBook Pro+, for example
Click OK, then click Apply
Do this for each of your Macs
Your iPhone and iPod will have a similar setup if you poke around on the wireless settings. Not sure about the iPad since I don't have one
You can find a similar setup on most of your AirPort routers by clicking on the device in AirPort Utility and then clicking Manual Setup
Click the Internet icon
Click the TCP/IP tab
Enter the info you want in the DHCP Client ID box
That should get names placed to MAC addresses for most device when you check the DHCP info area.

Jan 14, 2011 8:06 PM

Active5 years, 8 months ago

I have a 3rd Gen Airport Extreme (802.11n 3rd Gen Dual band) as my main router. Attached to it are an Airport Express (802.11n 1st Gen Single Band) which is connected by and extends WiFi over it's wired ethernet, and also an Airport Extreme (802.11n 2nd Gen Single Band) which extends wirelessly. I run a dual band network, the 2.4GHz network which is extended over the 2 slave devices (for want of a better description), and the main router also has a 5GHz network as it is a dual band router, and the guest network (which is an open network, no security).

In Airport Utility on iOS devices (I don't currently have access to a Mac to test the OS X application) I can select a device, select Wireless Clients, and list any clients that are connected to that particular device (from an access point perspective).

One problem with this is not seeing how can I identify which device is being shown in the list? Most attached devices will happily have a real description, namely iOS devices, Macs and some PCs etc, but I have a whole load of devices for which I cannot easily identify what is being connected. For example:

  • I sometimes just get the DHCP lease IP address shown as the client

  • I sometimes get a name that I don't recognise, i.e. Sue's iPhone or android-653246a714bc41f

  • I sometimes get the MAC address only

  • Sometimes (today, after I added a new access restriction) all the proper DHCP Client ID names are replaced with the MAC address for periods of time, and sometimes MAC addresses are shown when the client (example, Apple TV and Playstation 3) is in a WOL enabled sleep mode - still connected on the 'physical' layer, but with no IP address assigned.

My reasons for wanting to do this are varied:

  • The Airport Express has a limit of the number of connections that can be made to it, so it might be nice to move some devices to another access point to relieve strain on it

  • Being a bit fussy, I like to be able to identify what is what generally

  • I have reasons for leaving the guest network open in terms of security (some old devices that only support WEP, some devices are such a pain to type passwords into like my TV receiver box that I simply don't wish to spend 20 minutes faffing entering a very lengthy password via a TV remote control unit...). I know some people (Sue, and her iPhone) use my guest network without my permission, and I wanted to use access control to block these people as and when I see them use the network.

So, the problem for which I am asking this question is as follows:

  • How can I make the router set or remember a descriptive name for all devices, not just those that response to DHCP Client ID requests?
    • Sub question: How can I see all current DHCP leases, not just currently connected clients?

Mac Asking For Dhcp Client Id Google

I have tried to use DHCP reservations against a PC that only ever shows up with the MAC address, to see if it wil then pick up the description, and it doesn't seem to.

I have set a year long lease on my DHCP, so should be able to identify individual devices with some accuracy etc to stop devices sharing an IP address

Everything uses DHCP, the only hardcoded IPs are the routers themselves.


How To View Dhcp Client List

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1 Answer

It seems there is no way to force a client ID at the router end, so you have to make do with setting it right on the client. I discovered that my Apple TV and Playstation has spaces in the names that prevented them from setting the ID properly. Taking the spaces out made them show up properly. However, some clients manage to register names correctly with spaces, so I guess it's down to the implementation of the IP stack on the client device rather than a server issue.

It's also worth noting that after updating settings or resetting the routers, it appears to show just MACs until it has time at some point doing a lookup against it to set the ID. I found no way of working out how long this is, seems to be random.

It's also worth noting that some devices that are able to use Wake On LAN over wifi and that are currently in a sleep state will register at a Physical layer, so the router is able to send the relevant command to wake it, and as such the MAC is shown, but no IP (and hence no active DHCP use to pull the ID) until the device wakes and pulls it's IP/registers it's client ID.

Finally, using an old version (5.6.1) of Airport Utility it is possible to view a DHCP lease list of all clients, not just active wireless connections. Sadly it doesn't work on Mavericks, but you can bodge it to make it work. Unfortunately, either it does not track the DHCP leases for the guest network, or the lease length (not configurable) is short so pretty much only actively connected guests are shown in this list.

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