DHCP报文 表-1是整个报文的封装格式,包括链路层头、IP头、UDP头和DHCP报文,其中dhcp主要的数据都封装在dhcp报文中。 表-2 是DHCP报文的格式,各字段的说明如下: Op:消息操作代码,1byte,既可以是引导请求(BOOTREQUEST)也可以是引导答复(BOOTREPLY),1为请求报文;2为响应报文。具体的报文类型在option字段中标识。 H...
we haven't rewritten the lease database in over an hour, rewrite it now. */ if (count > 1000 || (count && cur_time - write_time > 3600)) { count = 0; write_time = cur_time; new_lease_file (); } return 1; } /*做lease的初始化,首先读取已有文件的lease内容。然后获取当前时间。
Parameter NameParameter Meaning Client InterfaceName Indicates the interface name of the DHCP client. Lease IpAddress Indicates the IP address of the DHCP client. Client MacAddress Indicates the MAC address of the DHCP client. Online Duration Time the lease was obtained. Lease Duration Lease...
Your lease time should be renewed after performing these steps. This will apply the new time period you set in the previous guide, allowing your device(s) to use the same IP address on the network for a custom amount of time. Final thoughts ...
Parameter NameParameter Meaning ClientInterfaceName Name of the interface on the DHCP client. ServerId IP address of the DHCP server. AcquiredIpAddress IP address assigned to the DHCP client. Mask Network mask. Gateway Gateway address. StaticRoute Static route. LeaseDuration Lease time. ...
This option is per-pool, meaning that if unknown clients are denied in the default range, another pool of IP addresses may be defined that allows clients instead. Can be set to one of the following values: Allow All Clients: This is the default behavior. The DHCPv6 server will answer requ...
default-lease-time 指定确省租赁时间的长度,单位是秒。 max-lease-time 指定最大租赁时间长度,单位是秒。 hardware 指定网卡接口类型和MAC地址。 server-name 通知DHCP客户服务器名称。 get-lease-hostnames flag 检查客户端使用的IP地址。 fixed-address ip 分配给客户端一个固定的地址。
全部Option地址:https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml BOOTP Vendor Extensions and DHCP Options Registration Pr
T1 1/2 lease time (in seconds) of the DHCP client IP address. T2 7/8 lease time (in seconds) of the DHCP client IP address. Lease from….to…. Start and end time of the lease. DHCP server DHCP server IP address that assigned the IP address. Transaction ID...
Dynamic Allocation:DHCP assigns IP addresses dynamically, meaning devices could have a different IP address each time they connect to the network. Efficiency:DHCP is easier to manage, especially in large networks where devices frequently join or leave. ...