[Kea-users] kea server not send custom dhcp options

Sten Carlsen stenc at s-carlsen.dk
Sun May 24 16:45:28 UTC 2020


Thanks

Sten

> On 24 May 2020, at 17.02, Anatoly Shipitsin <norguhtar at gmail.com> wrote:
> 
> Hello. I try add option 209. I read docs but it just not working.
> 
> I put in "Dhcp4"
> 
> "option-def": [ 
>            { 
>                "name": "ConfigFile", 
>                "code": 209, 
>                "type": "string", 
>                "array": false, 
>                "record-types": "", 
>                "space": "dhcp4", 
>                "encapsulate": ""
> }],
> 
> And add in "option-data" after 
>            { "name" : "routers", "data" : "194.117.250.1" }, 
>            { "name" : "domain-name-servers", "data" : "8.8.8.8, 8.8.4.4" }, 
> this 
>            { 
>                "name": "ConfigFile", 
>                "data": "testtest" 
>            },
> 
> 
> 
> And send dhcp request to server. But server not return 209 option.

Does the client ask for it? usually options besides the most basic are not sent if the client does not ask for them. The thinking behind is AFAIK that if the client does not ask, it will not know what to do with it, so no reason to send it.

> In server log i see:
> 
> 2020-05-24 14:49:11.304 DEBUG [kea-dhcp4.packets/14003] DHCP4_RESPONSE_DATA [hwtype=1 de:ad:c0:de:ca:fe], cid=[no info], tid=0xfc067955: responding with packet DHCPOFFER (type 2), packet de
> tails: local_address=192.168.1.11:67 <http://192.168.1.11:67/>, remote_adress=255.255.255.255:68 <http://255.255.255.255:68/>, msg_type=DHCPOFFER (2), transid=0xfc067955, 
> options: 
>  type=001, len=004: 4294967040 (uint32) 
>  type=003, len=004: 192.168.1.1 
>  type=006, len=008: 8.8.8.8 8.8.4.4 
>  type=051, len=004: 4000 (uint32) 
>  type=053, len=001: 2 (uint8) 
>  type=054, len=004: 192.168.1.10
> 
> Where is 209?
> 
> Version on kea server: 
> 
> kea-dhcp4 -v 
> 1.1.0
> 
> Linux Distro is Ubuntu 18.04 
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