DHCPv6服务器可以为已经具有IPv6地址/前缀的客户端分配其他网络配置参数,该过程称为DHCPv6无状态配置。
DHCPv6客户端通过地址无状态自动配置功能成功获取IPv6地址后,如果接收到的RA(Router Advertisement,路由器通告)报文中M标志位(Managed address configuration flag,被管理地址配置标志位)为0、O标志位(Other stateful configuration flag,其他配置标志位)为1,则DHCPv6客户端会自动启动DHCPv6无状态配置功能,以获取除地址/前缀外的其他网络配置参数
图一:DHCPv6无状态下发地址组网图
Client配置:
interface GigabitEthernet0/0
port link-mode route
ipv6 address auto
server配置:
interface GigabitEthernet0/0
port link-mode route
undo ipv6 nd ra halt
ipv6 nd autoconfig other-flag
ipv6 address 1::1/64
ip address 10.1.2.1 255.255.255.0
ipv6 dhcp server apply pool 1
结果显示:
[client]display ipv6 dhcp client interface g0/0
GigabitEthernet0/0 is in stateless DHCPv6 client mode
State is OPEN
Preferred Server:
Reachable via address : FE80::3EE5:A6FF:FE18:ECC8
DUID : 000300013ce5a618ecca
DNS servers : 3::3
Domain names : gaoguixian
[R3]display ipv6 interface brief
GigabitEthernet0/0 up up 1::3EE5:A6FF:FE18:EAC8
测试连通性:
[client]ping ipv6 1::1
PING 1::1 : 56 data bytes, press CTRL_C to break
Reply from 1::1
bytes=56 Sequence=0 hop limit=64 time = 5 ms
Reply from 1::1
bytes=56 Sequence=1 hop limit=64 time = 1 ms
Reply from 1::1
bytes=56 Sequence=2 hop limit=64 time = 1 ms
Reply from 1::1
bytes=56 Sequence=3 hop limit=64 time = 1 ms
Reply from 1::1
bytes=56 Sequence=4 hop limit=64 time = 1 ms
--- 1::1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 1/1/5 ms
1:MSR(V5)设备作为客户端,只能作为无状态获取客户端
2:若使用windows作为DHCPv6客户端,则可能会出现DNS地址无法显示,以及无法ping通无状态地址的问题,这个是客户端问题导致
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