DHCPv6学习总结

1、DHCPv6学习总结（1）小结小结DHCPv6协议报文详解协议报文详解DHCPv6协议报文交互过程协议报文交互过程有状态地址配置有状态地址配置无状态地址配置无状态地址配置无状态地址自动配置无状态地址自动配置A有状态地址自动配置有状态地址自动配置BDHCPv6RAs3(config-if-vlan1)#ipv6 address 2001:1/64s3(config-if-vlan1)#no ipv6 nd suppress-ra PC需支持IPv6协议栈2001:MAC后24位MAC前24位FE:FF S3MAC前24位的第7位置1（从左数）无状态地址自动配置无状态地址自动配置1PC除了通过自身

2、的MAC地址生成IPv6地址，也可能会同时生成一个前缀为2001:/64的EUI-64格式的IPv6地址生成IPv6地址 有状态地址自动配置即DHCPv6协议，通过DHCPv6协议报文的交互完成客户端，服务器，中继代理三者之间的通信 ，已达到IPv6地址及相关信息的分配和维护。有状态地址自动配置有状态地址自动配置1下图中描述了下图中描述了DHCPv6协议报文的交互过程协议报文的交互过程图1：DHCPv6客户端-服务器交互示意图SoReRyRwRyRsRySoAdAd比较收到的Advertise报文中preference字段值，将优先级大的Advertise报文中各选项值填入到响应报文Reque

3、st中（Request报文的目的IPv6地址为ff02:1:2，本例中取Server B的优先级大）向该客户端所在链路发送Solicit报文（目的IPv6地址：ff02:1:2)以查询本地链路上可获得的DHCPv6服务器。报文中包含客户端想要获取的服务器DUID、服务器优先级、DNS、域名以及IPv6地址选项字段对收到的Solicit报文进行响应，发送Advertise报文（目的IPv6地址为收到Solicit报文的源IPv6地址），该报文对Solicit报文中希望获取的选项字段做相应回应收到的Request报文,检查server identifier字段，其DUID是自己的DUID，进行响应

4、:发送reply报文（目的IPv6地址为收到Request报文的源IPv6地址），该报文相当于一个确认报文，告诉客户端其申请的地址合法有效，可以使用Re收到的Request报文,检查server identifier字段，其DUID不是自己的DUID，不进行响应处理方法与DHCP Server B相同当客户端申请到的IPv6地址经过优先生存周期的一半时，会发送Renew报文，以获取该IPv6地址持续使用权收到的Renew报文后，检查其中的IA_NA选项包含的地址信息是否符合服务器地址绑定表记录的该客户端信息 ，不符合则发送Reply报文告知客户端：NoBinding，符合但是该地址不再适合客户

5、端则发送Reply报文告知客户端该地址不可用（将生存周期置0），符合且可用则发送Reply报文更新该地址的生存周期，同时更新绑定信息。当客户端不再使用申请到的IPv6地址后，发送Release报文收到Release报文后，检查其中的IA_NA选项包含的地址信息是否符合服务器地址绑定表记录的该客户端信息 ，符合则删除该绑定信息并发送Reply报文通知客户端该地址的绑定信息已被删除IPv6地址的申请地址的申请1IPv6地址的维护地址的维护2IPv6地址的释放地址的释放3DHCPv6协议报文详解（通过实例配置进行学习）协议报文详解（通过实例配置进行学习）RAs3(config)#ipv6 enabl

6、e s3(config)#service dhcpv6 s3(config)#ipv6 dhcp pool zhangpengi s3(dhcpv6-zhangpengi-config)#network-address 2001:1 64 s3(dhcpv6-zhangpengi-config)#dns-server 2200:100 s3(dhcpv6-zhangpengi-config)# domain-name s3(dhcpv6-zhangpengi-config)# lifetime 200 100 s3(dhcpv6-zhangpengi-config)#excluded-addr

7、ess 2001:1 s3(config-if-vlan1)#ipv6 address 2001:1/64 s3(config-if-vlan1)#no ipv6 nd suppress-ra s3(config-if-vlan1)#ipv6 nd managed-config-flag s3(config-if-vlan1)#ipv6 nd other-config-flag s3(config-if-vlan1)#ipv6 dhcp server zhangpengi s3#debug ipv6 dhcp server event s3#debug ipv6 dhcp server pac

8、ket S3 Vista系统 vlan1交换机配置交换机配置IPv6地址申请地址申请客户端收到RA报文后，发现managed-config-flag和other-config-flag两个标志位为1，则发送Solicit报文通过有状态地址自动配置获取IPv6地址Solicit报文解析报文解析 vlan1So %Jan 09 17:13:04 2009 DHCPv6 PACKET: received SOLICIT from fe80:45fe:bdca:d4f6:4f67 on interface Vlan1 %Jan 09 17:13:04 2009 DHCPv6 DETAILS: cont

9、ents of SOLICIT packet %Jan 09 17:13:04 2009 transaction-ID: 0 x00c04672 %Jan 09 17:13:04 2009 elapsed time option(8), option-len 2%Jan 09 17:13:04 2009 elapsed time: 0 %Jan 09 17:13:04 2009 client ID option(1), option-len 14 %Jan 09 17:13:04 2009 DUID: 00:01:00:01:0f:fa:54:44:00:50:ba:f2:a4:e5 %Jan

10、 09 17:13:04 2009 identity association option(3), option-len 12 %Jan 09 17:13:04 2009 IANA: 0 x0e001d92, T1 0, T2 0 %Jan 09 17:13:04 2009 vendor class option(16), option-len 14 %Jan 09 17:13:04 2009 enterprise number : 311 %Jan 09 17:13:04 2009 option request option(6), option-len 6 %Jan 09 17:13:04

11、 2009 requested-option: domain search list %Jan 09 17:13:04 2009 requested-option: DNS server list %Jan 09 17:13:04 2009 requested-option: vendor specific infoIPv6地址申请地址申请Ad S3 vlan1Adertise报文解析报文解析 DHCPv6 PACKET: sending ADVERTISE to fe80:45fe:bdca:d4f6:4f67 on interface Vlan1 %Jan 09 17:13:04 2009

12、 DHCPv6 DETAILS: contents of ADVERTISE packet %Jan 09 17:13:04 2009 transaction-ID: 0 x00c04672 %Jan 09 17:13:04 2009 client ID option(1), option-len 14 %Jan 09 17:13:04 2009 DUID: 00:01:00:01:0f:fa:54:44:00:50:ba:f2:a4:e5 %Jan 09 17:13:04 2009 server ID option(2), option-len 14 %Jan 09 17:13:04 200

13、9 DUID: 00:01:00:01:49:67:2f:04:00:03:0f:10:16:1e %Jan 09 17:13:04 2009 identity association option(3), option-len 40 %Jan 09 17:13:04 2009 IANA: 0 x0e001d92, T1 43200, T2 69120 %Jan 09 17:13:04 2009 IA address option(5), option-len 24 %Jan 09 17:13:04 2009 IANA address: 2001:2, preferred-lifetime:

14、100, valid-lifetime: 200 %Jan 09 17:13:04 2009 preference option(7), option-len 1 %Jan 09 17:13:04 2009 preference: 0 %Jan 09 17:13:04 2009 DNS server list option(23), option-len 16 %Jan 09 17:13:04 2009 DNS server list: 2200:100 %Jan 09 17:13:04 2009 domain search list option(24), option-len 15 %Ja

15、n 09 17:13:04 2009 domain search list: . %Jan 09 17:13:04 2009 vendor specific info option(17), option-len 4 %Jan 09 17:13:04 2009 enterprise number : 6339IPv6地址申请地址申请Re S3 vlan1Request报文解析报文解析 %Jan 09 17:13:05 2009 DHCPv6 PACKET: received REQUEST from fe80:45fe:bdca:d4f6:4f67 on interface Vlan1 %Ja

16、n 09 17:13:05 2009 DHCPv6 DETAILS: contents of REQUEST packet %Jan 09 17:13:05 2009 transaction-ID: 0 x00c04672 %Jan 09 17:13:05 2009 elapsed time option(8), option-len 2%Jan 09 17:13:05 2009 elapsed time: 0 %Jan 09 17:13:05 2009 client ID option(1), option-len 14 %Jan 09 17:13:05 2009 DUID: 00:01:0

17、0:01:0f:fa:54:44:00:50:ba:f2:a4:e5 %Jan 09 17:13:05 2009 server ID option(2), option-len 14 %Jan 09 17:13:05 2009 DUID: 00:01:00:01:49:67:2f:04:00:03:0f:10:16:1e %Jan 09 17:13:05 2009 identity association option(3), option-len 40 %Jan 09 17:13:05 2009 IANA: 0 x0e001d92, T1 50, T2 80 %Jan 09 17:13:05

18、 2009 IA address option(5), option-len 24 %Jan 09 17:13:05 2009 IANA address: 2001:2, preferred-lifetime: 100, valid-lifetime: 200 %Jan 09 17:13:05 2009 vendor class option(16), option-len 14 %Jan 09 17:13:05 2009 enterprise number : 311 %Jan 09 17:13:05 2009 option request option(6), option-len 6 %

19、Jan 09 17:13:05 2009 requested-option: domain search list %Jan 09 17:13:05 2009 requested-option: DNS server list %Jan 09 17:13:05 2009 requested-option: vendor specific infoIPv6地址申请地址申请Ry S3 vlan1Reply报文解析报文解析 %Jan 12 11:03:33 2009 DHCPv6 PACKET: sending REPLY to fe80:45fe:bdca:d4f6:4f67 on interfa

20、ce Vlan1 %Jan 12 11:03:33 2009 DHCPv6 DETAILS: contents of REPLY packet %Jan 12 11:03:33 2009 transaction-ID: 0 x0040032f %Jan 12 11:03:33 2009 client ID option(1), option-len 14 %Jan 12 11:03:33 2009 DUID: 00:01:00:01:0f:fa:54:44:00:50:ba:f2:a4:e5 %Jan 12 11:03:33 2009 server ID option(2), option-l

21、en 14 %Jan 12 11:03:33 2009 DUID: 00:01:00:01:49:67:2f:04:00:03:0f:10:16:1e %Jan 12 11:03:33 2009 identity association option(3), option-len 40 %Jan 12 11:03:33 2009 IANA: 0 x0e001d92, T1 50, T2 80 %Jan 12 11:03:33 2009 IA address option(5), option-len 24 %Jan 12 11:03:33 2009 IANA address: 2001:2,

22、preferred-lifetime: 100, valid-lifetime: 200 %Jan 12 11:03:33 2009 DNS server list option(23), option-len 16 %Jan 12 11:03:33 2009 DNS server list: 2200:100 %Jan 12 11:03:33 2009 domain search list option(24), option-len 15 %Jan 12 11:03:33 2009 domain search list: . %Jan 12 11:03:33 2009 vendor spe

23、cific info option(17), option-len 4 %Jan 12 11:03:33 2009 enterprise number : 6339IPv6地址申请地址申请IPv6地址维护地址维护 当客户端申请到IPv6地址后，服务器上会有该地址的绑定信息，绑定信息详细记录了客户端的DUID、地址和地址生存周期。服务器通过对地址绑定表的维护来管理IPv6地址。 下面介绍服务器对IPv6地址的维护过程：IPv6地址维护地址维护 S3 vlan1 vlan1获取到了IPv6地址2001:2/64客户端对刚申请到的IPv6地址会做重复地址检测即发送Ns报文，相当于IPv4的免费Arp

24、NsNs检查Ns报文中的目的IPv6地址,发现与自己的IPv6地址相同,则发送响应报文Na PC2 2001:2/64 PC1NaNaIPv6地址维护地址维护De S3 vlan1Decline报文解析报文解析 %Jan 14 15:16:30 2009 DHCPv6 PACKET: received DECLINE from fe80:200:47ff:fe5c:4147 on interface Vlan1 %Jan 14 15:16:30 2009 DHCPv6 DETAILS: contents of DECLINE packet %Jan 14 15:16:30 2009 trans

25、action-ID: 0 x00dc22f5 %Jan 14 15:16:30 2009 elapsed time option(8), option-len 2%Jan 14 15:16:30 2009 elapsed time: 0 %Jan 14 15:16:30 2009 client ID option(1), option-len 14 %Jan 14 15:16:30 2009 DUID: 00:01:00:06:10:38:e8:9a:00:00:47:5c:41:47 00:01:00:06:10:38:e8:9a:00:00:47:5c:41:47 %Jan 14 15:1

26、6:30 2009 server ID option(2), option-len 14 %Jan 14 15:16:30 2009 DUID: 00:01:00:01:49:6d:ff:2b:00:03:0f:10:16:1e %Jan 14 15:16:30 2009 identity association option(3), option-len 40 %Jan 14 15:16:30 2009 IANA: 0 x00000001, T1 50, T2 80 %Jan 14 15:16:30 2009 IA address option(5), option-len 24 %Jan

27、14 15:16:30 2009 IANA address: 2001:2, preferred-lifetime: 100, valid-lifetime: 200客户端收到响应的Na报文后，知道在链路中存在冲突地址，则发送Decline报文（目的IPv6地址为ff02:1:2)，告知服务器报文中的地址已经被链路上的其它客户使用IPv6地址维护地址维护Ry S3 vlan1Reply报文解析报文解析 %Jan 14 15:16:30 2009 DHCPv6 PACKET: sending REPLY to fe80:200:47ff:fe5c:4147 on interface Vlan1

28、%Jan 14 15:16:30 2009 DHCPv6 DETAILS: contents of REPLY packet %Jan 14 15:16:30 2009 transaction-ID: 0 x00f5978f %Jan 14 15:16:30 2009 client ID option(1), option-len 14 %Jan 14 15:16:30 2009 DUID: 00:01:00:06:10:38:e8:9a:00:00:47:5c:41:47 %Jan 14 15:16:30 2009 server ID option(2), option-len 14 %Ja

29、n 14 15:16:30 2009 DUID: 00:01:00:01:49:6d:ff:2b:00:03:0f:10:16:1e %Jan 14 15:16:30 2009 identity association option(3), option-len 40 %Jan 14 15:16:30 2009 status code option(13), option-len 2%Jan 14 15:16:30 2009 status-code: success服务器收到Decline报文后，查找地址绑定表，如果有相应地址绑定信息，则响应Reply报文(status-code值为succe

30、ss)，如果查找不到该地址绑定信息，则响应Reply报文的status-code值为NoBindings3#show ipv6 dhcp binding Client: iatype IANA, iaid 0 x00000001 DUID: 00:01:00:06:10:38:e8:9a:00:00:47:5c:41:47 IANA leased address: 2001:2 Preferred lifetime 100 seconds, valid lifetime 200 seconds Lease obtained at %Jan 14 17:38:58 2009 Lease expi

31、res at %Jan 14 17:42:18 2009 (191 seconds left)服务器除了回应Reply报文外，对回应success的IPv6地址，首先会删除该地址绑定信息，然后记录在conflict地址表中，以后服务器就再也不会将该地址分配出去，除非手动清空该conflict地址表。s3#show ipv6 dhcp bindings3#show ipv6 dhcp conflictConflicted IPv6 addresses:2001:2 Rw S3 vlan1Renew报文解析报文解析 %Jan 14 15:21:57 2009 DHCPv6 PACKET: rece

32、ived RENEW from fe80:200:47ff:fe5c:4147 on interface Vlan1 %Jan 14 15:21:57 2009 DHCPv6 DETAILS: contents of RENEW packet %Jan 14 15:21:57 2009 transaction-ID: 0 x00f5978f %Jan 14 15:21:57 2009 elapsed time option(8), option-len 2 %Jan 14 15:21:57 2009 elapsed time: 0 %Jan 14 15:21:57 2009 client ID

33、 option(1), option-len 14 %Jan 14 15:21:57 2009 DUID: 00:01:00:06:10:38:e8:9a:00:00:47:5c:41:47 %Jan 14 15:21:57 2009 server ID option(2), option-len 14 %Jan 14 15:21:57 2009 DUID: 00:01:00:01:49:6d:ff:2b:00:03:0f:10:16:1e %Jan 14 15:21:57 2009 option request option(6), option-len 8 %Jan 14 15:21:57

34、 2009 requested-option: server ID %Jan 14 15:21:57 2009 requested-option: preference %Jan 14 15:21:57 2009 requested-option: domain search list %Jan 14 15:21:57 2009 requested-option: DNS server list %Jan 14 15:21:57 2009 identity association option(3), option-len 40 %Jan 14 15:21:57 2009 IANA: 0 x4

35、75c4147, T1 50, T2 80 %Jan 14 15:21:57 2009 IA address option(5), option-len 24 %Jan 14 15:21:57 2009 IANA address: 2001:2, preferred-lifetime: 100, valid-lifetime: 200如果客户端做重复地址检测时没有收到响应，则当时间经过T1值即优先生存周期的一半后，客户端会发送Renew报文以更新已获取的IPv6地址的生存周期Ry S3 vlan1Reply报文解析报文解析 %Jan 14 15:21:57 2009 DHCPv6 PACKET

36、: sending REPLY to fe80:200:47ff:fe5c:4147 on interface Vlan1 %Jan 14 15:21:57 2009 DHCPv6 DETAILS: contents of REPLY packet%Jan 14 15:21:57 2009 transaction-ID: 0 x00f5978f %Jan 14 15:21:57 2009 client ID option(1), option-len 14 %Jan 14 15:21:57 2009 DUID: 00:01:00:06:10:38:e8:9a:00:00:47:5c:41:47

37、 %Jan 14 15:21:57 2009 server ID option(2), option-len 14 %Jan 14 15:21:57 2009 DUID: 00:01:00:01:49:6d:ff:2b:00:03:0f:10:16:1e %Jan 14 15:21:57 2009 identity association option(3), option-len 40 %Jan 14 15:21:57 2009 IANA: 0 x475c4147, T1 50, T2 80 %Jan 14 15:21:57 2009 IA address option(5), option

38、-len 24 %Jan 14 15:21:57 2009 IANA address: 2001:2, preferred-lifetime: 100, valid-lifetime: 200 %Jan 14 15:21:57 2009 DNS server list option(23), option-len 16%Jan 14 15:21:57 2009 DNS server list: 2200:100 %Jan 14 15:21:57 2009 domain search list option(24), option-len 15 %Jan 14 15:21:57 2009 dom

39、ain search list: .s3#show ipv6 dhcp binding Client: iatype IANA, iaid 0 x00000001 DUID: 00:01:00:06:10:38:e8:9a:00:00:47:5c:41:47 IANA leased address: 2001:2 Preferred lifetime 100 seconds, valid lifetime 200 seconds Lease obtained at %Jan 14 17:38:58 2009 Lease expires at %Jan 14 17:42:18 2009 (191

40、 seconds left)1、Renew报文中的地址符合地址绑定信息且可用报文中的地址符合地址绑定信息且可用服务器收到Renew报文后，检查地址绑定表，发现有对应的地址绑定信息，则发送Reply报文更新该地址的生存周期和地址绑定信息中时间值s3#show ipv6 dhcp binding Client: iatype IANA, iaid 0 x00000001 DUID: 00:01:00:06:10:38:e8:9a:00:00:47:5c:41:47 IANA leased address: 2001:2 Preferred lifetime 100 seconds, valid l

41、ifetime 200 seconds Lease obtained at %Jan 14 17:38:58 2009 Lease expires at %Jan 14 17:42:18 2009 (198 seconds left)2、Renew报文中的地址在地址绑定信息中不存在报文中的地址在地址绑定信息中不存在Ry S3 vlan1Reply报文解析报文解析s3#clear ipv6 dhcp binding s3#show ipv6 dhcp binding 当再次收到Renew报文后，服务器查找地址绑定表，没有发现相应的地址表项，则发送如下格式的Reply报文（ status code

42、值为no binding） %Jan 14 15:26:51 2009 DHCPv6 PACKET: sending REPLY to fe80:200:47ff:fe5c:4147 on interface Vlan1 %Jan 14 15:26:51 2009 DHCPv6 DETAILS: contents of REPLY packet %Jan 14 15:26:51 2009 transaction-ID: 0 x00001750 %Jan 14 15:26:51 2009 client ID option(1), option-len 14 %Jan 14 15:26:51 20

43、09 DUID: 00:01:00:06:10:38:e8:9a:00:00:47:5c:41:47 %Jan 14 15:26:51 2009 server ID option(2), option-len 14 %Jan 14 15:26:51 2009 DUID: 00:01:00:01:49:6d:ff:2b:00:03:0f:10:16:1e %Jan 14 15:26:51 2009 identity association option(3), option-len 18 %Jan 14 15:26:51 2009 IANA: 0 x475c4147, T1 0, T2 0 %J

44、an 14 15:26:51 2009 status code option(13), option-len 2 %Jan 14 15:26:51 2009 status code: no binding %Jan 14 15:26:51 2009 DNS server list option(23), option-len 16 %Jan 14 15:26:51 2009 DNS server list: 2200:100 %Jan 14 15:26:51 2009 domain search list option(24), option-len 15 %Jan 14 15:26:51 2

45、009 domain search list: .3、Renew报文中的地址在地址绑定信息中存在但不适用于当前接口报文中的地址在地址绑定信息中存在但不适用于当前接口Ry S3 vlan1Reply报文解析报文解析在收到客户端的Renew报文之前，改变接口IPv6地址 s3(config-if-vlan1)#no ipv6 address 2001:1/64s3(config-if-vlan1)#ipv6 address 2003:1/64重新申请IPv6地址当再次收到Renew报文后，服务器查找地址绑定表，发现有对应地址信息，但是发现与本地接口地址不在同一网段，在Reply报文中告知客户端该地

46、址不可用即把地址生存周期置0 %Jan 14 18:04:39 2009 DHCPv6 PACKET: sending REPLY to fe80:203:fff:fefe:3045 on interface Vlan1 %Jan 14 18:04:39 2009 DHCPv6 DETAILS: contents of REPLY packet%Jan 14 18:04:39 2009 transaction-ID: 0 x00003cc9 %Jan 14 18:04:39 2009 client ID option(1), option-len 14 %Jan 14 18:04:39 200

47、9 DUID: 00:01:00:06:10:38:e8:9a:00:00:47:5c:41:47 %Jan 14 18:04:39 2009 server ID option(2), option-len 14 %Jan 14 18:04:39 2009 DUID: 00:01:00:01:49:6e:1d:07:00:03:0f:10:16:1e %Jan 14 18:04:39 2009 identity association option(3), option-len 40 %Jan 14 18:04:39 2009 IANA: 0 x00000001, T1 0, T2 0 %Ja

48、n 14 18:04:39 2009 IA address option(5), option-len 24 %Jan 14 18:04:39 2009 IANA address: 2001:2, preferred-lifetime: 0, valid-lifetime: 0告知客户端地址2001:2生存周期为0即地址不可用4、DHCPv6服务器失效，客户端发送服务器失效，客户端发送Rebind报文报文 当DHCPv6服务器由于某些原因失效时，客户端发送的Renew报文得不到响应，客户端肯定会重发Renew报文，一般重发3次，如果依旧没有得到回应，当到达T2时间段时，客户端会发送Rebind

49、报文，该报文的功能相当于Renew报文，客户端希望DHCPv6服务器能在该时间段恢复正常并能响应自己的地址续约请求。 %Jan 14 15:27:31 2009 DHCPv6 PACKET: received REBIND from fe80:200:47ff:fe5c:4147 on interface Vlan1 %Jan 14 15:27:31 2009 DHCPv6 DETAILS: contents of REBIND packet %Jan 14 15:27:31 2009 transaction-ID: 0 x00d90fe3 %Jan 14 15:27:31 2009 elap

50、sed time option(8), option-len 2 %Jan 14 15:27:31 2009 elapsed time: 1000 %Jan 14 15:27:31 2009 option request option(6), option-len 8 %Jan 14 15:27:31 2009 requested-option: server ID %Jan 14 15:27:31 2009 requested-option: preference %Jan 14 15:27:31 2009 requested-option: domain search list %Jan

51、14 15:27:31 2009 requested-option: DNS server list %Jan 14 15:27:31 2009 client ID option(1), option-len 14 %Jan 14 15:27:31 2009 DUID: 00:01:00:06:10:38:e8:9a:00:00:47:5c:41:47 %Jan 14 15:27:31 2009 identity association option(3), option-len 40 %Jan 14 15:27:31 2009 IANA: 0 x475c4147, T1 50, T2 80

52、%Jan 14 15:27:31 2009 IA address option(5), option-len 24 %Jan 14 15:27:31 2009 IANA address: 2001:2, preferred-lifetime: 100, valid-lifetime: 200与Renew报文比较，内容基本一致如果DHCPv6服务器在收到Rebind报文之前恢复了正常，其响应结果与对Renew报文的响应一致Rl S3 vlan1Release报文解析报文解析 %Jan 12 11:37:45 2009 DHCPv6 PACKET: received RELEASE from fe

53、80:45fe:bdca:d4f6:4f67 on interface Vlan32 %Jan 12 11:37:45 2009 DHCPv6 DETAILS: contents of RELEASE packet %Jan 12 11:37:45 2009 transaction-ID: 0 x00c7be43 %Jan 12 11:37:45 2009 elapsed time option(8), option-len 2%Jan 12 11:37:45 2009 elapsed time: 0 %Jan 12 11:37:45 2009 client ID option(1), opt

54、ion-len 14 %Jan 12 11:37:45 2009 DUID: 00:01:00:06:10:38:e8:9a:00:03:0f:fe:30:45 %Jan 12 11:37:45 2009 server ID option(2), option-len 14 %Jan 12 11:37:45 2009 DUID: 00:01:00:01:49:67:2f:04:00:03:0f:10:16:1e %Jan 12 11:37:45 2009 identity association option(3), option-len 40 %Jan 12 11:37:45 2009 IA

55、NA: 0 x0e001d92, T1 50, T2 80 %Jan 12 11:37:45 2009 IA address option(5), option-len 24 %Jan 12 11:37:45 2009 IANA address: 2001:2, preferred-lifetime: 100, valid-lifetime: 200 %Jan 12 11:37:45 2009 vendor class option(16), option-len 14 %Jan 12 11:37:45 2009 enterprise number : 311 %Jan 12 11:37:45

56、 2009 option request option(6), option-len 6 %Jan 12 11:37:45 2009 requested-option: domain search list %Jan 12 11:37:45 2009 requested-option: DNS server list %Jan 12 11:37:45 2009 requested-option: vendor specific infoIPv6地址释放地址释放Ry S3 vlan1Reply报文解析报文解析 %Jan 12 11:37:45 2009 DHCPv6 PACKET: sendin

57、g REPLY to fe80:45fe:bdca:d4f6:4f67 on interface Vlan1 %Jan 12 11:37:45 2009 DHCPv6 DETAILS: contents of REPLY packet %Jan 12 11:37:45 2009 transaction-ID: 0 x00c7be43 %Jan 12 11:37:45 2009 client ID option(1), option-len 14 %Jan 12 11:37:45 2009 DUID: 00:01:00:06:10:38:e8:9a:00:03:0f:fe:30:45 %Jan

58、12 11:37:45 2009 server ID option(2), option-len 14 %Jan 12 11:37:45 2009 DUID: 00:01:00:01:49:67:2f:04:00:03:0f:10:16:1e %Jan 12 11:37:45 2009 status code option(13), option-len 2%Jan 12 11:37:45 2009 status-code: success %Jan 12 11:37:45 2009 vendor specific info option(17), option-len 4 %Jan 12 1

59、1:37:45 2009 enterprise number : 6339收到Release报文后，服务器查找地址绑定表，如果有相应地址绑定信息，则告知客户端成功释放该地址(Reply报文中的status-code值为success),该地址对于服务器来说，可以再次被分配给其它客户端;如果在地址绑定表中无相应地址绑定信息，则回应的Reply报文中status-code值为NoBindingRapid Commit选项功能选项功能 S3 vlan1目前Vista系统还不支持使能Rapid Commit选项，可以通过在winxp系统（装有 IPv6协议栈）中运行Dibbler软件，该软件必须装在C盘根目录下s3(config-if-vlan1)#ipv6 dhcp server zhangpengi rapid-commit iface local2 rapid-commit yes ia option dns-server option domain option vendor-spec在Dibbler文件夹中打开名为client.conf的配置文件，进行如下相应配置：local2为pc网卡名，rapid-commit yes使能rapid commit选项，ia使能ipv6地址选项，另外还使能了一些其它选项C:Documents and SettingszpCD C:C:CD d