<div dir="ltr"><div>Hi Jim</div><div><br></div><div>You can use any unique numbers for this. I am using like this and working</div><div><br></div>{<br>        "id": 32,<br>        "subnet": "<a href="http://172.16.32.0/24">172.16.32.0/24</a>",<br>        "pools": [<br>          {<br>            "pool": "172.16.32.50 - 172.16.32.250"<br>          }<br>        ],<br>        "option-data": [<br>          {<br>            "space": "dhcp4",<br>            "name": "domain-name-servers",<br>            "code": 6,<br>            "data": "172.16.11.30, 172.16.11.31"<br>          },<br>          {<br>            "space": "dhcp4",<br>            "name": "domain-name",<br>            "code": 15,<br>            "data": "<a href="http://example.com">example.com</a>"<br>          },<br>          {<br>            "space": "dhcp4",<br>            "name": "routers",<br>            "code": 3,<br>            "data": "172.16.32.1"<br>          },<br>          {<br>            "space": "dhcp4",<br>            "name": "broadcast-address",<br>            "code": 28,<br>            "data": "172.16.32.255"<br>          }<br>        ],<br>        "valid-lifetime": 86400,<br>        "max-valid-lifetime": 864000<br>      },<br>      {<br>        "id": 40,<br>        "subnet": "<a href="http://172.16.40.0/24">172.16.40.0/24</a>",<br>        "pools": [<br>          {<br>            "pool": "172.16.40.50 - 172.16.40.250"<br>          }<br>        ],<br>        "option-data": [<br>          {<br>            "space": "dhcp4",<br>            "name": "domain-name-servers",<br>            "code": 6,<br>            "data": "172.16.11.30, 172.16.11.31"<br>          },<br>          {<br>            "space": "dhcp4",<br>            "name": "domain-name",<br>            "code": 15,<br>            "data": "<a href="http://example.com">example.com</a>"<br>          },<br>          {<br>            "space": "dhcp4",<br>            "name": "routers",<br>            "code": 3,<br>            "data": "172.16.40.1"<br>          },<br>          {<br>            "space": "dhcp4",<br>            "name": "broadcast-address",<br>            "code": 28,<br>            "data": "172.16.40.255"<br>          }<br>        ],<br>        "valid-lifetime": 86400,<br>        "max-valid-lifetime": 864000<br>      },<br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, Aug 27, 2025 at 11:25 PM <<a href="mailto:jim@wrightthisway.com">jim@wrightthisway.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On 2025-08-27 12:15, Ben Scott wrote:<br>
> On 8/27/25 12:33, Jim wrote:<br>
>> My big question is the ID for each subnet,<br>
>> I see no info in the docs on if there is a max value for this,<br>
> <br>
>   At present it is a 32-bit unsigned integer.  So 4294967295 is the <br>
> largest possible value (2^32-1, since it counts from zero).<br>
> <br>
>   It is defined in src/lib/dhcpsrv/subnet_id.h in the code.<br>
> <br>
>> my second concern would be if using large(ish)<br>
>> values would have any performance impact.<br>
> <br>
>   I'm not aware of any.  It's supposed to just be an opaque identifier. <br>
> There are plenty of people using "large" values here without complaint.<br>
<br>
Thank you Ben and Jonas!  I did try searching the docs for this but <br>
searching for 'subnet' and 'id' weren't helpful.  LOL<br>
<br>
Jim<br>
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