确认(Acknowledge):DHCP服务器收到DHCP请求消息后,会向设备发送一个DHCP确认消息,其中包含分配给设备的IP地址、子网掩码、默认网关、DNS服务器等配置信息。 续约(Renewal):在IP地址租期到期之前,设备会周期性地向DHCP服务器发送DHCP续约消息,以延长租期。 释放(Release):设备不再需要IP地址时,会向DHCP服务器发送DHCP...
https://serverfault.com/questions/601670/keepalived-vip-removed-with-dhcp-renewal https://www.keepalived.org/manpage.html
Renewal (T1) Time Value 4 RFC 2132 59 Rebinding (T2) Time Value 4 RFC 2132 60 Vendor class identifier n RFC 2132 61 Client-identifier n RFC 2132 62 NetWare/IP Domain N (1<=N<=255) RFC 2242 63 NetWare/IP Option N (1<=N<=255) ...
Before the lease expires, the client checks with the DHCP server to renew the lease. The client sends a DHCP Renewal Request message to the server, requesting an extension of the lease duration. Lease Renewal Response: The DHCP server, upon receiving the Renewal Request, verifies the request a...
Renewal(T1) time value:更新时间值,选项58,用于指定更新时间。 Rebinding(T2) time value:重绑定时间值,选项59,用于指定重绑定时间值。 Client identifier:客户端标识,选项61,用于唯一标识客户端,CISCO用此作为服务器地址绑定表的索引。 1.1.2 DHCP报文类型 ...
option dhcp-renewal-time 54000000; option dhcp-rebinding-time 94500000; option rfc3442-classless-static-routes 0,172,16,0,1,32,169,254,169,254,172,16,0,1; option broadcast-address 172.16.0.255; option host-name "host-172-16-0-54"; option domain-name "openstacklocal"; renew 3 2025/06...
option dhcp-renewal-time 40305; option classless-static-routes 32.169.254.169.254 172.16.0.2,0 172.16.0.1; option broadcast-address 172.16.255.255; option dhcp-rebinding-time 72705; option host-name "host-172-16-2-231"; option domain-name "openstacklocal"; ...
DHCP:Renewal Time Value (T1) = 8 Days, 0:00:00 !---想要继续租约原来分配的IP地址,则提出续约申请的期限为8天DHCP:Rebinding Time Value (T2) = 14 Days, 0:00:00 !---如果上次申请续约失败,再次申请绑定原来分配到的IP地址的期限为14天DHCP:IP Address Lease Time = 16Days, 0:00:00 !---...
lease{interface"eth0";fixed-address172.16.2.231;option subnet-mask255.255.0.0;option routers172.16.0.1;option dhcp-lease-time86400;option dhcp-message-type5;option domain-name-servers8.8.4.4;option dhcp-server-identifier172.16.0.2;option interface-mtu1450;option dhcp-renewal-time40305;option classless-...
Figure 7-7 IPv4 address lease renewal by a DHCPv4 client When the lease reaches 50% (T1) of its validity period, the DHCPv4 client unicasts a DHCPREQUEST message to the DHCPv4 server to request lease renewal. If the DHCPv4 client receives a DHCPACK message, the IPv4 address ...