dhcpv6 option 79
时间: 2023-10-11 17:08:56 浏览: 50
IPv6中的DHCPv6选项79是用于指定客户端的域名服务器(DNS)列表。当DHCPv6服务器为客户端分配IPv6地址时,可以通过使用选项79来通知客户端要使用哪些DNS服务器。
客户端可以将DHCPv6请求中的选项79字段设置为获取DNS服务器的首选列表。DHCPv6服务器在回复客户端请求时,会将正确的DNS服务器地址列表包含在选项79中,以便客户端能够使用这些DNS服务器解析域名。
请注意,选项79是可选的,而且并非所有的DHCPv6服务器都支持此选项。此外,配置DNS服务器列表也可以通过其他方式进行,如手动配置或通过路由器通告等。
相关问题
openwrt dhcpv6
OpenWrt supports DHCPv6 for IPv6 address assignment and configuration. To enable DHCPv6 on OpenWrt, you need to install the necessary packages and configure the DHCPv6 server.
Here's a step-by-step guide to setting up DHCPv6 on OpenWrt:
1. Log in to your OpenWrt router's web interface or connect to it via SSH.
2. Install the required packages by running the following command:
```shell
opkg update
opkg install odhcpd-ipv6only
```
3. Edit the DHCPv6 server configuration file by running the command:
```shell
vi /etc/config/dhcp
```
4. In the `config dhcp 'lan'` section, add or modify the following lines:
```shell
option
dnsmasq option6
Dnsmasq is a lightweight DNS and DHCP server software that can be used to provide DNS and DHCP services to a small network. The "option6" in Dnsmasq refers to DHCPv6 options, which are used to provide additional configuration information to DHCPv6 clients.
DHCPv6 options are similar to DHCP options in IPv4, but they are used to provide IPv6-specific configuration information. Some common DHCPv6 options include:
- DNS Server: Specifies the IP address of the DNS server that the client should use.
- Domain Name: Specifies the DNS domain name that the client should use.
- NTP Server: Specifies the IP address of the NTP server that the client should use.
- SIP Server: Specifies the IP address of the SIP server that the client should use.
To configure DHCPv6 options in Dnsmasq, you can use the "dhcp-option" directive in the dnsmasq.conf file. For example, to specify the DNS server address, you can add the following line to your dnsmasq.conf file:
dhcp-option=option6:dns-server,2001:db8::1
This will instruct Dnsmasq to provide the DNS server address "2001:db8::1" to DHCPv6 clients. You can also specify multiple DHCPv6 options by adding multiple "dhcp-option" directives to your dnsmasq.conf file.