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doc: list supported DHCP client options

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Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
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Joachim Wiberg
2023-12-14 16:40:41 +01:00
committed by Mattias Walström
parent c14b4e4152
commit eb0022b39d
1 changed files with 27 additions and 1 deletions
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doc/networking.md
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@@ -122,7 +122,33 @@ Multiple address assignment methods are available:
| link-local | infix-ip | Auto-assignment of IPv4 address in 169.254.x.x/16 range |
| dhcp | infix-dhcp-client | Assignment of IPv4 address by DHCP server, e.g., *10.0.1.1/24* |
DHCP address method is only available for *LAN* interfaces (ethernet, virtual ethernet (veth), bridge, etc.)
Supported DHCP (request) options, configurability (Cfg) and defaults,
are listed below. Configurable options can be disabled on a per client
interface basis, some options, like `clientid` and option 81, are
possible to set the value of as well.
| **Opt** | **Name** | **Cfg** | **Description** |
|---------|------------------|---------|-----------------------------------------------------|
| 1 | `subnet` | No | Request IP address and netmask |
| 3 | `router` | Yes | Default route(s), see also option 121 and 249 |
| 6 | `dns` | Yes | DNS server(s), static ones take precedence |
| 12 | `hostname` | Yes | DHCP cannot set hostname, only for informing server |
| 15 | `domain` | Yes | Default domain name, for name resolution |
| 28 | `broadcast` | Yes | Broadcast address, calculated if disabled |
| 42 | `ntpsrv` | Yes | NTP server(s), static ones take precedence |
| 50 | `address` | Yes | Request (previously cached) address |
| 61 | `clientid` | Yes | Default MAC address (and option 12) |
| 81 | `fqdn` | Yes | Similar to option 12, request FQDN update in DNS |
| 119 | `search` | Yes | Request domain search list |
| 121 | `staticroutes` | Yes | Classless static routes |
| 249 | `msstaticroutes` | Yes | Microsoft static route |
| | | | |
**Default:** `router`, `dns`, `domain`, `broadcast`, `ntpsrv`, `search`,
`address`, `staticroutes`, `msstaticroutes`
> **Note:** DHCP address method is only available for *LAN* interfaces
> (Ethernet, virtual Ethernet (veth), bridge, link aggregates, etc.)
### IPv6 Address Assignment