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17. November 2011 at 21:17 #6950WyseGuy230Member
- Total Post: 2
We are having some difficulty with our Wyse R90L7 thin clients with Windows Embedded 7 from receiving the WDM server ip address from DHCP.
Our clients have zero problems obtaining the usual DHCP info like ip address, subnet mask, gateway and dns but will not get the WDM server ip address.
According to the WDM documentation we need the following DHCP options tags:
Configuring the DHCP Server
Configure the following option tag values on your DHCP server:
Option tag 186 – IP address of your WDM server (for example, 192.168.1.10). The value
should be in 4-byte IP address format.
Option tag 190 – Secure port number to which WDM server listens (for example,
port 443). The value should be in word format (value = 0x01bb) or 2-byte array format
(value = 0x01 0xbb).
Option tag 192 – Non-secure port number to which WDM server listens (for example, 80).
The value should be in either word format (value = 0x0050), or 2-byte array format (value=
The device we are using for DHCP is a Cisco ASA firewall. Below is the DHCP setup on the device.
dhcpd dns 22.214.171.124
dhcpd lease 86400
dhcpd option 192 hex 50
dhcpd option 190 hex 01bb
dhcpd option 186 ip 126.96.36.199
dhcpd address 10.99.1.50-10.99.1.100 inside
dhcpd enable inside
As I stated the thin client get on the network and receives an ip address but when I enter the control panel and open the WDM icon the server ip address doesn’t reflect our WDM server. I’ve has the same results with using DHCP from a Windows 2008 server as well. So simply put it hasn’t yet worked at all.
We can’t use DNS since the ASA firewall doesn’t have DNS server capability (yes I checked).
Any assistance is appreciated.17. November 2011 at 21:58 #21383WyseGuy230Member
- Total Post: 2
Here is a wireshark capture of a DHCP discover phase from the thin client broadcasting to the network. As you can see it would appear that the thin client is not even asking for option 186???
Option: (t=53,l=1) DHCP Message Type = DHCP Discover
Option: (53) DHCP Message Type
Option: (t=61,l=7) Client identifier
Option: (61) Client identifier
Hardware type: Ethernet
Client MAC address: WyseTech_99:3e:45 (00:80:64:99:3e:45)
Option: (t=50,l=4) Requested IP Address = 10.99.1.53
Option: (50) Requested IP Address
Option: (t=12,l=15) Host Name = “WES008064993E45”
Option: (12) Host Name
Option: (t=60,l=8) Vendor class identifier = “MSFT 5.0”
Option: (60) Vendor class identifier
Option: (t=55,l=12) Parameter Request List
Option: (55) Parameter Request List
1 = Subnet Mask
15 = Domain Name
3 = Router
6 = Domain Name Server
44 = NetBIOS over TCP/IP Name Server
46 = NetBIOS over TCP/IP Node Type
47 = NetBIOS over TCP/IP Scope
31 = Perform Router Discover
33 = Static Route
121 = Classless Static Route
249 = Private/Classless Static Route (Microsoft)
43 = Vendor-Specific Information
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