# DHCP\_DNS

* [Docs](#docs)
* [Static](#static)
  * [Luci](#luci)
  * [uci](#uci)
* [Lease Time](#lease-time)
  * [per client](#per-client)
  * [remove active](#remove-active)

## Docs

<https://openwrt.org/docs/guide-user/base-system/dhcp\\_configuration>

## Static

/etc/config/dhcp

### Luci

* all conf: <http://wrt.lan/cgi-bin/luci/admin/network/dhcp>
* dynamic -> static : <http://wrt.lan/cgi-bin/luci/admin/status/overview>

### uci

```
uci show | grep dhcp | grep host

uci add dhcp host         # will create `dhcp.@host[INDEX]=host`
uci set dhcp.@host[-1].ITEM # -1 : last | -x: xth from last

uci delete dhcp.@host[-1]

uci commit dhcp         # refresh Luci
service dnsmasq restart # reconnect client
```

## Lease Time

```
cat /tmp/dhcp.leases 

uci show | grep dhcp | grep lease
=> dhcp.lan.leasetime='12h'

uci set dhcp.lan.leasetime='10m'
uci commit dhcp; service odhcpd restart ; service dnsmasq restart
```

### per client

<https://openwrt.org/docs/guide-user/dhcp/dhcp\\_configuration#dhcp\\_pools>

luci: <http://wrt.lan/cgi-bin/luci/admin/network/dhcp>

### remove active

```
vi /tmp/dhcp.leases
/etc/init.d/dnsmasq restart
```