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Linux DHCP Server Vendor Option 43? (SUSE 9)

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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 , :)
 
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