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RE: [apnic-talk] Help required: Unable to Ping Global Ipv6 addressfrom d

Subject: RE: [apnic-talk] Help required: Unable to Ping Global Ipv6 addressfrom different host
From: "Mustafa F. Rana"
Date: Fri, 7 Apr 2006 18:47:38 +0500
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From: [email protected] [mailto:[email protected]] On Behalf Of Shishir Belbase
Sent: April 07, 2006 4:51 PM
To: 'somashekar'; [email protected]
Subject: RE: [apnic-talk] Help required: Unable to Ping Global Ipv6 addressfrom different host

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Shishir

>-----Original Message-----
>From: somashekar [mailto:[email protected]]
>Sent: Friday, April 07, 2006 5:54 AM
>To: [email protected]
>Subject: RE: [apnic-talk] Help required: Unable to Ping Global Ipv6
>addressfrom different host
>
>
>Thanks for identifying and rectifying my problem.
>As suggested I removed the line IPV6ADDR=fe80::208:74ff:fe2e:4154 from
>ifcfg-eth0 file.
>I am using Dibbler for DHCPv6 Server and Clients.
>
>The Dibbler client.conf file does not contain anything.
>
>The server.conf file contains the following log-level 7 log-mode short
>
>iface eth0 {
>
># clients should renew every half an hour
> T1 1800
> T2 2000
> prefered-lifetime 3600
> valid-lifetime 7200
> class {
>   pool 2000::1-2000::ff
> }
>
> option dns-server ::1
> option domain celstream1.com
>
>}
>
>I changed the class pool for a different range of addresses. But still I
>am getting the /128 global Ipv6 addresses.
>Please let me know about the way of getting the /64 global IPv6
>addresses, when I run the Dibbler DHCPv6.
>
>Thanks,
>Soma
>
>-----Original Message-----
>From: Jeroen Massar [mailto:[email protected]]
>Sent: Wednesday, April 05, 2006 5:46 PM
>To: somashekar
>Cc: [email protected]
>Subject: Re: [apnic-talk] Help required: Unable to Ping Global Ipv6
>addressfrom different host
>
>On Wed, 2006-04-05 at 14:38 +0530, somashekar wrote:
>[..]
>
>> /etc/sysconfig/network-scripts/ifcfg-eth0
>> DEVICE=eth0
>> BOOTPROTO=dhcp
>> >
>> TYPE=Ethernet
>> IPV6INIT=yes
>> IPV6TO4INIT=yes
>> DHCP6C=yes
>> IPV6ADDR=fe80::208:74ff:fe2e:4154
>
>You should never have to specify a link local address, it is
>automatically generated from EUI-64.
>
>[..]
>> Using dibbler-0.4.1-linux.tar for DHCP Ipv6 server and client
>>
>> I got the Global inet6 addr which is 2000::bd
>
>You get 2000::bd/128, which is where the problem lies.
>Next to that 2000::/bd is a valid global unicast address and is most
>likely not assigned to you. If you want a test address range either use
>the documentation prefix (2001:db8::/32) or better use "Unique Local
>Unicast" as per RFC4193 (http://www.ietf.org/rfc/rfc4193.txt)
>
>> [[email protected] ~]# ifconfig
>[..]
>>           inet6 addr: 2000::bd/128 Scope:Global
>
>This is only 1 single IP address and it doesn't 'know' where the other
>IP address is.
>
>Make it 2001:db8::bd/64 and it will work as then the other address
>(2001:db8::7f/64) is in the same prefix and then there is a route
>between the two IP addresses.
>
>Other way around is to do:
>ip -6 ro add 2000::7f/128 dev eth0
>on the 2000::bd/128 box, and:
>ip -6 ro add 2000::bd/128 dev eth0
>on the 2000::7f/128 box
>
>But that is quite nasty. Use use /64's per link as it is supposed to be
>used.
>
>Greets,
> Jeroen
>
>
>
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