Hi Joop,
A host reservation should have an identifier. If you do not use the
"hw-address,"
what identifier do you use?
You may wish to use the following, which appends the IP address to the
hostname:
"hostname-expr" :
"concat('vm-test-',addrtotext(option[50].hex))" } }
/Peter
On 05/01/2026 16.59, Joop Boonen wrote:
Dear all,
I'm using the option like this.
"Dhcp4": {
"hooks-libraries": [
{
"library": "libdhcp_ddns_tuning.so",
"parameters": {
"hostname-expr" : "concat('vm-
test-',hexstring(option[50].hex,''))"
}
},
I notice when I don't have an hw-address entry
{
"hw-address": "<hw-addres>",
"ip-address": "<ip-address",
"hostname": "<hostname>"
},
The ddns entries doesn't get Updated.
For some reason it looks like hostname-expr needs an assigned hostname.
Does someone know how this can be solved.
Regards,
Joop Boonen.
--
Peter Davies
Support Engineer
Internet Systems Corporation
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