From: Bit Gossip (bit.gossip@chello.nl)
Date: Wed Sep 05 2007 - 03:03:09 ART
Hi Sergey,
I don't think you can delegate a prefix that you are locally using: in your
lab 2001::/64 is in use on the DHCP server and you are also trying to
delegate it. See below my setup:
- R2 is the client and gets its local ip of f0/0 from DHCP server out of
2001:2001:2001:2001::/64
- plus it also gets as PD 2001:2001:2003::/48 which in turns is subnetted
and 2001:2001:2003:cc1e::/64 is assigned to lo0
R2(config-if)#do br6
FastEthernet0/0 [up/up]
FE80::201:C9FF:FE2D:CC00
2001:2001:2001:2001:201:C9FF:FE2D:CC00
Loopback0 [up/up]
FE80::201:C9FF:FE2D:CC00
2001:2001:2003:CC1E:201:C9FF:FE2D:CC00
HTH,
Bit.
R1 ~~~~~~~~~~~~~~~~~~~~
ipv6 dhcp pool POOL6
prefix-delegation pool PD-POOL6
dns-server 2001:2001:2001:2001:2001:2001:2001:2001
domain-name cisco.com
!
ipv6 dhcp pool PD-POOL6
!
interface FastEthernet0/0
no ip address
speed 100
full-duplex
ipv6 address 2001:2001:2001:2001::/64 eui-64
ipv6 nd other-config-flag
ipv6 dhcp server POOL6
!
ipv6 local pool PD-POOL6 2001:2001:2003::/48 48
!
R2 ~~~~~~~~~~~~~~~~~~~~~~
interface FastEthernet0/0
no ip address
duplex full
ipv6 address autoconfig
ipv6 enable
ipv6 dhcp client pd IPV6-PREFIX
end
R2#show run int lo0
Building configuration...
Current configuration : 91 bytes
!
interface Loopback0
no ip address
ipv6 address IPV6-PREFIX 0:0:0:CC1E::/64 eui-64
end
----- Original Message -----
From: "Sergey" <public@svlp.net>
To: "'Cisco certification'" <ccielab@groupstudy.com>
Sent: Monday, August 27, 2007 10:59 AM
Subject: Ipv6 DHCP
> I've labed ipv6 DHCP, but my router does not request ipv6 addr from dhcp
> server, why ?
>
>>>DHCP Server
>
> ipv6 dhcp pool dhcp
> prefix-delegation pool r1
> dns-server 2005::CA09:A
> domain-name example.local
>
>
> ipv6 local pool r1 2001::/64 64
>
>
> interface FastEthernet0/0
> no ip address
> duplex auto
> speed auto
> ipv6 address 2001::2/64
> ipv6 nd managed-config-flag
> ipv6 nd other-config-flag
> ipv6 nat
> ipv6 dhcp server dhcp rapid-commit
>
>
>
>>> CLIENT
>
> interface FastEthernet0/0
> no ip address
> duplex auto
> speed auto
> ipv6 address autoconfig
> ipv6 enable
> ipv6 nd suppress-ra
> end
>
>
> debug from server
>
> *Mar 1 20:06:55.059: IPv6 DHCP: Received INFORMATION-REQUEST from
> FE80::CE00:CFF:FEC9:0 on FastEthernet0/0
> *Mar 1 20:06:55.063: IPv6 DHCP: detailed packet contents
> *Mar 1 20:06:55.063: src FE80::CE00:CFF:FEC9:0 (FastEthernet0/0)
> *Mar 1 20:06:55.067: dst FF02::1:2
> *Mar 1 20:06:55.067: type INFORMATION-REQUEST(11), xid 6145391
> *Mar 1 20:06:55.067: option ELAPSED-TIME(8), len 2
> *Mar 1 20:06:55.067: elapsed-time 0
> *Mar 1 20:06:55.071: option CLIENTID(1), len 10
> *Mar 1 20:06:55.071: 00030001CC000CC90000
> *Mar 1 20:06:55.071: option ORO(6), len 4
> *Mar 1 20:06:55.075: DNS-SERVERS,DOMAIN-LIST
> *Mar 1 20:06:55.075: IPv6 DHCP: Sending REPLY to FE80::CE00:CFF:FEC9:0 on
> FastEthernet0/0
> *Mar 1 20:06:55.075: IPv6 DHCP: detailed packet contents
> *Mar 1 20:06:55.075: src FE80::CE01:CFF:FEC9:0
> *Mar 1 20:06:55.075: dst FE80::CE00:CFF:FEC9:0 (FastEthernet0/0)
> *Mar 1 20:06:55.075: type REPLY(7), xid 6145391
> *Mar 1 20:06:55.079: option SERVER
> R2#ID(2), len 10
> *Mar 1 20:06:55.079: 00030001CC010CC90000
> *Mar 1 20:06:55.083: option CLIENTID(1), len 10
> *Mar 1 20:06:55.083: 00030001CC000CC90000
> *Mar 1 20:06:55.083: option DNS-SERVERS(23), len 16
> *Mar 1 20:06:55.083: 2005::CA09:A
> *Mar 1 20:06:55.083: option DOMAIN-LIST(24), len 15
> *Mar 1 20:06:55.083: example.local
>
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