cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

Cisco Community Designated VIP Class of 2020

728
Views
5
Helpful
6
Replies
Highlighted
Cisco Employee

Router DHCP binding - 12-digit MAC fails?

Team,

The DHCP server In my IOS router (adventerprisek9-mz.151-3.T3) has a couple of fixed DHCP bindings.

ip dhcp pool philipshue

   host 10.22.1.42 255.255.255.0

   client-identifier 0100.1788.0a64.56

   dns-server 8.8.8.8

!

ip dhcp pool philipshue2

   host 10.22.1.43 255.255.255.0

   client-identifier 0017.880a.6456

   dns-server 8.8.8.8

!

The Philips Hue light bridge registers with the following MAC address, even though a client-identifier is configured!

10.22.1.131          0017.880a.6456          Mar 72 2014 18:63 PM    Automatic

This is not picked up by the configuration.

Any idea why?

Everyone's tags (4)
2 ACCEPTED SOLUTIONS

Accepted Solutions
Rising star

Router DHCP binding - 12-digit MAC fails?

Hello Dirk,

Problem is with implementation of DHCP on various OS. Some OS use client-identifier, some use "broken" client-identifier and some use hardware address (MAC).

My Ubuntu 10.04 use MAC address as identifier, so to make static reservation for my laptop, I need to configure hardware-address xxxx.xxxx.xxxx

Best Regards

Please rate all helpful posts and close solved questions

Best Regards Please rate all helpful posts and close solved questions

View solution in original post

Advisor

Router DHCP binding - 12-digit MAC fails?

Hi,

as already explained in a previous answer you'll need the hardware-address xxxx.xxxx.xxxx command in your host pool instead of the client-identifier command but first you'll have to clear your dynamic binding.

Regards

Alain

Don't forget to rate helpful posts.

Don't forget to rate helpful posts.

View solution in original post

6 REPLIES 6
Rising star

Router DHCP binding - 12-digit MAC fails?

Hello Dirk,

Problem is with implementation of DHCP on various OS. Some OS use client-identifier, some use "broken" client-identifier and some use hardware address (MAC).

My Ubuntu 10.04 use MAC address as identifier, so to make static reservation for my laptop, I need to configure hardware-address xxxx.xxxx.xxxx

Best Regards

Please rate all helpful posts and close solved questions

Best Regards Please rate all helpful posts and close solved questions

View solution in original post

Cisco Employee

Router DHCP binding - 12-digit MAC fails?

Thank you for the quick response. Unfortunately this is an appliance (Philips Hue lamp zigbee controller) where I don't have root access ;-)

Hope that anyone has a tip to catch these strange client-identifiers!

DJ

Rising star

Router DHCP binding - 12-digit MAC fails?

Hello,

It is definitely not a final solution and certainly not scalable one, but you can allow these host to obtain IP from dynamic pool and from output of show ip dhcp binding copy client-identifier/hardware-address to configure static DHCP.

Best Regards

Please rate all helpful posts and close solved questions

Best Regards Please rate all helpful posts and close solved questions
Cisco Employee

Router DHCP binding - 12-digit MAC fails?

that's what I did..  the last output in my question is actually from the show ip dhcp binding

10.22.1.131          0017.880a.6456          Mar 24 2014 18:63 PM    Automatic

The identifier for this device is 2 characters shorter than any of the others, and not accepted with the 2 static DHCP entries I created.

Maybe this is some scenario that I have to live with as it can't be fixed.. If that's the case, just let me know ;-)

Advisor

Router DHCP binding - 12-digit MAC fails?

Hi,

as already explained in a previous answer you'll need the hardware-address xxxx.xxxx.xxxx command in your host pool instead of the client-identifier command but first you'll have to clear your dynamic binding.

Regards

Alain

Don't forget to rate helpful posts.

Don't forget to rate helpful posts.

View solution in original post

Cisco Employee

Re: Router DHCP binding - 12-digit MAC fails?

Ah! So sorry... My brain interpreted 'hardware-address' as 'mac address' and not the actuall command 'hardware-address' ;-)

Will try this asap.. Many thanks for the responses and patience..

Update: It's working!

CreatePlease to create content
Content for Community-Ad