DHCP Vendor specific options config

[Pierre Dlbl]

Hello all,

I need to re-create a Windows DHCP server config on a 3850 switches stack. No problem for scopes without vendor specific options but I need some help for the VOIP phones scope :

On the Windows DHCP server, I have several options with Vendor "MSUCClient" and then hex values.

How can I config them on the switch ?

Thank you !

Pierre.

[Mark Malone]

Hi

Cisco switches/routers only have a stripped down dhcp server settings compared to an actual MS server , your not going to get all the options , you should always use a real dhcp server where possible , its just a feature on a cisco switch/router , your options will be limited compared to MS

http://www.cisco.com/c/en/us/td/docs/ios/12_2/ip/configuration/guide/fipr_c/1cfdhcp.html

[Pierre Dlbl]

Hi,

Ok, thank you. It's on a branch office where we won't have an MS DHCP server for the moment so we have to find a temporary solution.

I found this link : http://www.shudnow.net/2011/05/02/configuring-lync-dhcp-using-cisco-dhcp-servers-vlan-and-pin-auth/

I will try and do some tests and if it's not working I'll see if I can put the dhcp on the firewall.

Pierre.

[Mark Malone]

Hi

You could also use a helper address so it could reach the HQ MS DHCP server from the branch office , I have remote sites setup like this , where the DHCP is centralized in HQ and feeds out to the branch sites

[Pierre Dlbl]

Yes, that's what we did at first but for some reason we have to do SNAT on the HQ firewall, and when the DHCP receives requests with a different source address it does not work...

So I think my only options are DHCP on the switch or on the local firewall, right ?