某局点MSR5660作为DHCPv6客户端从运营商获取IPv6地址以及前缀。
在接口配置如下命令时无法获取IPv6地址与前缀:
ipv6 dhcp client stateful prefix 1 rapid-commit option-group 1
在接口配置如下命令时可以正常获取IPv6地址与前缀:
ipv6 address dhcp-alloc rapid-commit option-group 1
ipv6 dhcp client pd 1 rapid-commit option-group 2
1.
命令1:
ipv6 address dhcp-alloc [ option-group group-number | rapid-commit ] *
接口作为DHCPv6客户端,通过DHCPv6方式获取IPv6地址和其他网络配置参数
命令2:
ipv6 dhcp client pd prefix-number [ option-group group-number | rapid-commit ]*
接口作为DHCPv6客户端,通过DHCPv6方式获取IPv6前缀和其他网络配置参数
命令3:
ipv6 dhcp client stateful prefix prefix-number [ option-group option-group-number | rapid-commit ] *
接口作为DHCPv6客户端,通过DHCPv6方式同时获取IPv6地址、IPv6前缀和其他网络配置参数
2.
GigabitEthernet2/0/0:
Type: Stateful client requesting address and prefix
State: IDLE
Client DUID: 000300017ebc89240200
3.通过debugging dhcpv6客户端信息,发现设备没有发出DHCPv6请求
4.查看接口状态发现接口没有link-local地址,所以无法发出DHCPv6报文。
GigabitEthernet2/0/0 current state: UP
Line protocol current state: UP
5.分析两种配置方法的区别
方法1:无法自动生成link-local地址,需要单独命令配置link-local地址
ipv6 dhcp client stateful prefix 1 rapid-commit option-group 1
方法2:可以自动生成link-local地址
ipv6 address dhcp-alloc rapid-commit option-group 1 //该命令设备会自动生成了link-local地址
ipv6 dhcp client pd 1 rapid-commit option-group 2
在接口配置命令自动生成link-local地址:
ipv6 address auto link-local
GigabitEthernet2/0/0:
Type: Stateful client requesting address and prefix
State: OPEN
Client DUID: 000300017ebc89240200
Preferred server:
Reachable via address: FE80::7CBC:85FF:FE64:105
Server DUID: 000300017ebc85640100
IA_NA: IAID 0x00000001, T1 302400 sec, T2 483840 sec
Address: 2001::2
Preferred lifetime 604800 sec, valid lifetime 2592000 sec
Will expire on Mar 25 2019 at 16:36:11 (2591973 seconds left)
IA_PD: IAID 0x00000001, T1 302400 sec, T2 483840 sec
Prefix: 2002::/64
Preferred lifetime 604800 sec, valid lifetime 2592000 sec
Will expire on Mar 25 2019 at 16:36:11 (2591973 seconds left)
DNS server addresses:
3001::A48:4224
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