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配置选项对应的指令列表:
isc-dhcp-ipv4/dhcp-4.2.4/common/tables.c
私有编号:
1. 定义:
# 配置文件有声明的编号 会在接收的时候 替换成类似new_acip1=value 形式
# 声明一个私有编号名字: acip1, 编号: 234, 值类型: string
# string类型: 一种 “abc”形式, 另一种十六进制形式:
option acip1 code 234 = string;
# 向目标请求一个选项acip1, 数据包里面的 option-55(参数请求列表) 就会带上这个编号, # request 请求要写在{}类里面, 并且最后一个request 才生效
request acip1;
# 强制发送, 向目标发送一个私有选项 acip1 编号 234, 内容acip138
send acip1 "acip138";
# 选择发送, 如果目标有请求 234编号, 就发送
option acip1 “acip138”
2. 请求:
# 公共规则
# 声明一个选项 名, private1 编号 234(个人私有编号, 随便写的) 值类型 string
option private1 code 234 = string;
# 指定接口规则, 优先级高
interface "eth0" {
# 请求234选项
request subnet-mask,vendor-encapsulated-options;
}
3. 处理:
# 声明
option acip code 138 = string;
option private1 code 234 = string;
option vendor-encapsulated-options code 43 = string;
subnet 192.168.5.0 netmask 255.255.255.0 {
range 192.168.5.2 192.168.5.254;
# 根据请求发送
option routers 192.168.5.1;
option subnet-mask 255.255.255.0;
option vendor-encapsulated-options "dhcp43";
#option serverip 03:0C:31:39:32:2E:31:36:38:2E:32:32:2E:31;
# 强制发送
send acip "acip";
}
dhclient 配置
dhclient –d eth0
debug模式运行
1. 拓普图:
2. 配置信息:
isc-dhcp
dhclient.conf 配置:
timeout 300;
retry 15;
reboot 10;
select-timeout 5;
initial-interval 5;
# 公共规则
send vendor-class-identifier "dhcp60";
send vendor-encapsulated-options "dhcp43";
request routers, host-name;
# 指定接口规则, 优先级高
interface "eth0" {
send vendor-class-identifier "acdhcp60";
send vendor-encapsulated-options "acdhcp43";
request subnet-mask, broadcast-address, time-offset, routers, domain-name, domain-name-servers, host-name, netbios-name-servers, netbios-scope;
}
dhcpd option 43配置
vendor-encapsulated-options 通告另一个设备的IP
dhcpd -d -cf dhcpd.conf -lf dhcpd.leases
debug模式运行
1. 拓普图:
2. 配置信息:
option vendor43 code 43 = string;
class "ac43-req" {
# 全字符串匹配, 做标记
match if option vendor43 = "acdhcp43";
}
shared-network "dhcp" { # 用来告知是否一些子网络分享相同网络 ?
subnet 192.168.10.0 netmask 255.255.255.0 {
option routers 192.168.10.1;
}
pool { # 一个IP池
# class 为 acdhcp43
allow members of "ac43-req";
# 地址范围
range 192.168.10.10 192.168.10.20;
# 根据请求发送
option vendor43 "192.168.100.100";
# 强制发送
#send vendor43 "192.168.100.100";
}
# network interface, 绑定到 192.168.5.0 这个的接口上(至少绑定一个有效接口)
subnet 192.168.5.0 netmask 255.255.255.0 {
option routers 192.168.5.1;
}
pool {
# class 不为 acdhcp43
deny members of "ac43-req";
range 192.168.5.30 192.168.5.40;
}
}
dhcpd option 60配置
使用option vendor-class-identifier 60 指定的dhcpd
1. 拓普图:
2. 配置信息:
# vendor-class-identifier == acdhcp60, 标记 members 为 acdhcp60, 执行 pool: 192.168.5.10
# 否则: pool: 10.0.29.10
class "acdhcp60" {
# 部分字符串匹配
#match if substring (option vendor-class-identifier, 0, 4) = "abcd";
# 完整字符串匹配, 匹配: vendor-class-identifier == acdhcp60
match if option vendor-class-identifier = "acdhcp60";
}
shared-network "dhcp" { # 用来告知是否一些子网络分享相同网络 ?
# network interface, 绑定到 192.168.5.0 这个的接口上(至少绑定一个有效接口)
subnet 192.168.5.0 netmask 255.255.255.0 {
option routers 192.168.5.1;
}
pool { # 一个IP池
# class 为 acdhcp60
allow members of "acdhcp60";
range 192.168.5.10 192.168.5.25;
}
subnet 10.0.29.0 netmask 255.255.255.0 {
option routers rtr-29.example.org;
}
pool {
# class 不为 acdhcp60
deny members of "acdhcp60";
range 10.0.29.10 10.0.29.230;
}
}