Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations Mike Lewis on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!

Linux DHCP Server Vendor Option 43? (SUSE 9)

Status
Not open for further replies.

ADB100

Technical User
Mar 25, 2003
2,399
GB
I have a customer using a Linux DHCP Server and we need to send Option 43 to some Cisco LWAPP Wireless Access Points. They have followed the guide here on CCO: However it isn't working. I have had a look at a Sniffer trace and compared it to an IOS device configured with the same options and there is a difference in what is sent. The Linux DHCP server prepends the Option 43 string with another header:

IOS Option 43:
2b 06 f1 04 0a 0a 0a 0a - Translates to 43 06 241 04 10 10 10 10
This is Option 43, Length 06, Option 241, Length 04 & 10.10.10.10

Linux Option 43:
2b 08 2b 06 241 04 0a 0a 0a 0a - This has the extra '2b 08' prepending it which the AP is not understanding.

I think we can workaround it by removing the Vendor-Class stuff and just editing Option 43 directly (i.e. adding option opt-43 = f1:04:0a:0a:0a:0a).

Does anyone know if this is a bug or is there a workaround as we ideally need to use Vendor Classes?

Thanks

Andy
 
The workaround I thought would work (no vendor classes, just option 43) didn't and the same '2b 08' prepended header is present. Does anyone know if this is a bug or is there a workaround?

Andy
 
We are using:

option vendor-encapsulated-options ",xxx.xxx.xxx.xxx,yyy.yyy.yyy.yyy";

Replace xxx.xxx.xxx.xxx and yyy.yyy.yyy.yyy with the ip-adress for yours controllers. Don't forget the first , :)
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top