isc-dhcp 4.2.5 -它是否支持dhcp-客户端标识符和供应商类标识符？

Question

我在两个CentOS7.4盒上安装了isc-dhcp-4.2.5服务器和客户端.我知道这是很老的发行版，但由于各种原因我不能改变它。

Dhcp服务器配置：

option domain-name "mydomain.org";
option domain-name-servers ns1.mydomain.org, ns2.mydomain.org;

default-lease-time 600;
max-lease-time 7200;

log-facility local7;

option space myspace;
option myspace.node-ip code 1 = ip-address;

# Tell the server to return vendor-specific information
option dhcp-parameter-request-list 43;

class "vendor-classes" {
    match option vendor-class-identifier;
}

subclass "vendor-classes" "my-vendor-class-ID" {
    vendor-option-space myspace;
    option myspace.node-ip 10.5.6.7;
}

subnet 10.0.0.0 netmask 255.255.255.0 {
    range 10.0.0.50 10.0.0.60;
    option routers 10.0.0.254;
}

Dhcp客户端配置：

interface "veth0" {
    send dhcp-client-identifier "my-client-ID"; 
    send vendor-class-identifier "my-vendor-class-ID";
    send dhcp-lease-time 900;
}

我看到了两个问题：

1. 客户端未能发送选项dhcp-client-identifier和vendor-class-identifier，tcpdump没有显示这些选项
2. 服务器无法发送选项-43。

几乎这个版本根本不支持dhcp-client-identifier和vendor-class-identifier？我做错了什么？

PS。最新的ISC-dhcp (ver.4.4.2)从https://gitlab.isc.org/isc-projects/dhcp构建没有这些问题。

Answer 1

你试过用

interface "veth0" {
   send dhcp-client-identifier = "my-client-ID"; 
   send vendor-class-identifier = "my-vendor-class-ID";
   send dhcp-lease-time = 900;
}