ipv6 assignment via dhcp

[sarahr202]

Hi everybody

I am trying to make Router get its ipv6 address via dhcp.

R3(config-if)#ipv6 address dhcp
% Incomplete command.

R3(config-if)#ipv6 address dhcp ?
  X:X:X:X::X/<0-128>  IPv6 prefix

According to my book,all i need is " ipv6 address dhcp " under a interface. But when I do that, i get the error" incomplete command ".

========================================================

A totally different question

Please look at the output from my book:

Global unicast address(es):

    2001::200:11FF:FE11:2222, subnet is 2001::/64 [EUI/TEN]

Global unicast address(es):

    2001::200:11FF:FE11:2222, subnet is 2001::/64 [EUI/TEN]

What does " TEN" mean above ?

Thanks and have a great weekend.

[cadet alain · Accepted solution]

Hi sarahr202,

TEN means the address is tentative which means that it uniqueness is still not verified and so it will not accept packet sent to this address except  DAD packets.

the ipv6 address dhcp is indeed enough to make an interface a stateful dhcp client, can you provide info about the platform and interface you're trying this command on as well as the config of the client and server.

Regards

Alain

Don't forget to rate helpful posts.

[sarahr202]

Hi Alain.

I did not configure any dhcpv6 server. When I read that we can configure a client( Cisco router) for ipv6 assignment via dhcp using ipv6 address dhcp., I checked it on gns3. 

R1(config)#int f0/0
R1(config-if)#ipv6 address dhcp
% Incomplete command.

R1#show running-config
Building configuration...

Current configuration : 907 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef
!
!
!
!
no ip domain lookup
ip domain name lab.local
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
multilink bundle-name authenticated
!
!
!
archive
log config
  hidekeys
!
!
!
!
!
!
!
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
!
end

Thanks and have a great weekend