dhcp request :由用户发向服务器的广播报文,目的是用来通知其他服务器是否使用服务器分配的ip地址。同时该报文还有续租的作用。
dhcp 租期: 目的是合理有效的使用ip地址。分配SEO靠我给客户端的ip地址都是有租期的,当到达租期一半的时候,客户端会自动触发续租消息(dhcp request报文)。DHCP协议报文:
DHCPDISCOVER: 由客户端广播来查找可用的服务器
DHCP OSEO靠我FFER: 服务器用来响应客户端的DHCP DISCOVER报文,并指定相应的配置参数。
DHCP REQUEST: 由客户端发送给服务器来请求配置参数或者请求配置确认或者续借租期。
DHCP ACK: SEO靠我由服务器到客户端,含有配置参数包括IP地址。DHCP高级报文:
DHCP DECLINE: 当客户端发现地址已经被使用时,用来通知服务器。
DHCP INFORM: 客户端已经有IP地址时用它来向服务器请SEO靠我求其他的配置参数。
DHCP NAK: 由服务器发送给客户端来表明客户端的地址请求不正确或者租期已过期。
DHCP RELEASE: 客户端要释放地址时用来通知服务器。DHCP配置
全局建立地址池[HuawSEO靠我ei]ip pool xiaoguo [Huawei-ip-pool-xiaoguo]gateway-list 192.168.1.1 [Huawei-ip-pool-SEO靠我xiaoguo]network 192.168.1.0 mask 24 [Huawei-ip-pool-xiaoguo]dns-list 8.8.8.8 [HuaweiSEO靠我]interface GigabitEthernet 0/0/0 [Huawei-GigabitEthernet0/0/0]dhcp select global修改租期(可选)
[HuaSEO靠我wei]ip pool xiaoguo [Huawei-ip-pool-xiaoguo]lease day 0 hour 20绑定固定mac对应IP(可选)
[Huawei]ip pooSEO靠我l xiaoguo [Huawei-ip-pool-xiaoguo]static-bind ip-address 192.168.1.254 mac-address 5489-98E4SEO靠我-199F排除地址段(可选)
[Huawei]ip pool xiaoguo [Huawei-ip-pool-xiaoguo]excluded-ip-address 192.168.1.SEO靠我200 192.168.1.250调试指令:显示已经分配的ip地址的使用情况
[Huawei]display ip pool name xiaoguo used重置分配记录
<Huawei>reset iSEO靠我p pool name xiaoguo used2.基于接口的dhcp(简单、便捷)
[Huawei]interface GigabitEthernet 0/0/0 [Huawei-GiSEO靠我gabitEthernet0/0/0]ip address 192.168.1.1 24 [Huawei-GigabitEthernet0/0/0]dhcp select interfSEO靠我ace [Huawei-GigabitEthernet0/0/0]dhcp server dns-list 8.8.8.83.dhcp relay(dhcp中继)
sw1:<HuaweiSEO靠我>system-view [Huawei]sysname sw1 [sw1]undo info-center enable [sw1]vlan batch 10 20 800[sw1]dhcp enaSEO靠我ble [sw1]interface Vlanif 800[sw1-Vlanif800]ip add 192.168.254.1 24[sw1]interface Vlanif 10[sw1-VlanSEO靠我if10]ip add 192.168.10.1 24[sw1-Vlanif10]dhcp select relay [sw1-Vlanif10]dhcp relay server-ip 192.16SEO靠我8.254.2[sw1]interface Vlanif 20[sw1-Vlanif20]ip add 192.168.20.1 24[sw1-Vlanif20]dhcp select relay[sSEO靠我w1-Vlanif20]dhcp relay server-ip 192.168.254.2[sw1]interface GigabitEthernet 0/0/1 [sw1-GigabitEtherSEO靠我net0/0/1]port link-type access [sw1-GigabitEthernet0/0/1]port default vlan 800[sw1-GigabitEthernet0/SEO靠我0/1]int g0/0/2 [sw1-GigabitEthernet0/0/2]port link-type trunk [sw1-GigabitEthernet0/0/2]port trunk aSEO靠我llow-pass vlan 10[sw1-GigabitEthernet0/0/2]int g0/0/3 [sw1-GigabitEthernet0/0/3]port link-type trunkSEO靠我 [sw1-GigabitEthernet0/0/3]port trunk allow-pass vlan 20sw2:<Huawei>system-view [Huawei]sysname sw2[SEO靠我sw2]vlan 10[sw2]interface e0/0/1[sw2-Ethernet0/0/1]port link-type trunk [sw2-Ethernet0/0/1]port trunSEO靠我k allow-pass vlan 10[sw2-Ethernet0/0/1]int e0/0/2[sw2-Ethernet0/0/2]port default vlan 10sw3:<Huawei>SEO靠我system-view [Huawei]sysname sw3[sw3]vlan 20[sw3]int e0/0/1[sw3-Ethernet0/0/1]port link-type trunk[swSEO靠我3-Ethernet0/0/1]port trunk allow-pass vlan 20[sw3-Ethernet0/0/1]int e0/0/2[sw3-Ethernet0/0/2]port liSEO靠我nk-type access[sw3-Ethernet0/0/2]port default vlan 20R1:[Huawei]sysname R1-DHCP[R1-DHCP]int g0/0/0[RSEO靠我1-DHCP-GigabitEthernet0/0/0]dhcp select global [R1-DHCP-GigabitEthernet0/0/0]ip add 192.168.254.2 24SEO靠我[R1-DHCP]ip route-static 0.0.0.0 0 192.168.254.1[R1-DHCP]ip pool vlan10[R1-DHCP-ip-pool-vlan10]netwoSEO靠我rk 192.168.10.0 mask 24[R1-DHCP-ip-pool-vlan10]gateway-list 192.168.10.1[R1-DHCP-ip-pool-vlan10]dns-SEO靠我list 8.8.8.8[R1-DHCP]ip pool vlan20[R1-DHCP-ip-pool-vlan20]network 192.168.20.0 mask 24[R1-DHCP-ip-pSEO靠我ool-vlan20]gateway-list 192.168.20.1[R1-DHCP-ip-pool-vlan20]dns-list 8.8.8.8网站备案号:浙ICP备17034767号-2