[afripv6-discuss] Configuring a 6to4 Relay in Cisco

Tue Jun 12 13:02:36 SAST 2007

Hello Jordi, Thank you for this very important initiative.
I am the administrator of the network ISP of Maurinania.
Since the last meeting of Afrinic I am convinced of the necessity of putting 
its network in IPv6.
I would want your supports and your assistance to prepare this migration 
towards the IPv6. A migration which I plan before the end of year 2008.
what you advise me to begin?
Thank you in advance.

----------------------------------------
Mohamed Lemine Ould Mohamed Fadel
Chef Centre Internet/ADSL
Tel: +222 525 32 43
Mob: +222 658 63 27
Fax: +222 525 73 58
Mauritel - Mauritanie
----------------------------------------
----- Original Message ----- 
From: "JORDI PALET MARTINEZ" <jordi.palet at consulintel.es>
To: <afripv6-discuss at afrinic.net>
Sent: Sunday, June 10, 2007 8:11 AM
Subject: Re: RE : Re: RE : [afripv6-discuss] Configuring a 6to4 Relay in 
Cisco

> Hi Herve,
>
> In this case, I think the IPv6 prefix request must be done by the
> University/organization instead of by a single department. I guess you're
> not yet an AfriNIC member ?
>
> Are you the network administrator for the full organization ?, otherwise,
> let's get in touch with him to start the process.
>
> Other issues to start working on this will be:
> 1) Who provides you the transit (one or several ISPs and which ones) ?
> 2) What routing equipment (and others) you have, including software
> versions, in order to make sure that they support IPv6, or otherwise look
> for alterntives ?
> 3) Do you have at least one public IPv4 address (it will be much easier in
> case we need to arrange tunneling)?
>
> Regards,
> Jordi
>
>
>
>
>> De: hervé TYPAMM <typamm at yahoo.fr>
>> Responder a: <typamm at yahoo.fr>
>> Fecha: Sat, 9 Jun 2007 18:43:01 +0200 (CEST)
>> Para: <jordi.palet at consulintel.es>, "IPv6 in Africa
>> <afripv6-discuss at afrinic.net>" <afripv6-discuss at afrinic.net>
>> Asunto: RE : Re: RE : [afripv6-discuss] Configuring a 6to4 Relay in Cisco
>>
>> Jordi,
>> My network is not big. It's a Computer High school
>> network (www.esiba.edu)and we have about 50 computers.
>>
>>
>> Hervé
>>
>>
>> --- JORDI PALET MARTINEZ <jordi.palet at consulintel.es>
>> a écrit :
>>
>>> Hi Herve,
>>>
>>> That's easy. Let's try first to understand how big
>>> is your network.
>>>
>>> What kind of customers you connect and number of
>>> each (residential,
>>> enterprises, cellular phones, etc.). Which that we
>>> can make an estimation of
>>> the size of the prefix you need and then we can
>>> start with the form.
>>>
>>> Regards,
>>> Jordi
>>>
>>>
>>>
>>>
>>>> De: hervé TYPAMM <typamm at yahoo.fr>
>>>> Responder a: <typamm at yahoo.fr>
>>>> Fecha: Sat, 9 Jun 2007 15:52:04 +0200 (CEST)
>>>> Para: <jordi.palet at consulintel.es>, "IPv6 in
>>> Africa
>>>> <afripv6-discuss at afrinic.net>"
>>> <afripv6-discuss at afrinic.net>
>>>> Asunto: RE : [afripv6-discuss] Configuring a 6to4
>>> Relay in Cisco
>>>>
>>>> Thank you Jordi for this initiative. I need help
>>> in
>>>> order to acquire my IPv6 prefix from AfriNIC
>>>>
>>>> Hervé
>>>>
>>>>
>>>>
>>>>
>>>> --- JORDI PALET MARTINEZ
>>> <jordi.palet at consulintel.es>
>>>> a écrit :
>>>>
>>>>> This info provides the steps requires in order to
>>>>> configure your Cisco box
>>>>> as a 6to4 Relay.
>>>>>
>>>>> In order to proceed, you need to have a public
>>> IPv4
>>>>> address on that router,
>>>>> your own IPv6 prefix (provided by AfriNIC in this
>>>>> case) and IPv6 transit.
>>>>>
>>>>> And of course, the router need to have an IOS
>>>>> supporting IPv6 (including
>>>>> 6to4 support).
>>>>>
>>>>> If you need help in order to acquire your IPv6
>>>>> prefix from AfriNIC, let us
>>>>> know and we can help even with the request form.
>>>>>
>>>>> Similarly, we are able to help in making sure you
>>>>> have the right IOS version
>>>>> (and to configure it) and you can get IPv6
>>> transit
>>>>> (native or tunneling)
>>>>> either from your upstream, or alternatively, if
>>>>> that's not possible, we will
>>>>> be able to provide free IPv6 transit to third
>>> party
>>>>> networks.
>>>>>
>>>>> Regards,
>>>>> Jordi
>>>>>
>>>>>
>>>>> Details of the example configuration
>>>>> =====================================
>>>>>
>>>>> The examples below is assuming that the public
>>> IPv4
>>>>> address in the WAN
>>>>> interface of the router is 192.1.2.3. You should
>>>>> replace that with the right
>>>>> information for your own case, same with other
>>> data
>>>>> used in the examples.
>>>>>
>>>>> Also, you need to understand how to calculate the
>>>>> 6to4 IPv6 address for your
>>>>> router. This is done using the IPv4 address and
>>> the
>>>>> IPv6 6to4 prefix.
>>>>>
>>>>> The 6to4 prefix 2002::/16 is taking the first 16
>>>>> bits. Then the bits 17 to
>>>>> 48 are the nibble notation for your IPv4 address.
>>> So
>>>>> in our example it will
>>>>> be:
>>>>>
>>>>> 192 = c0
>>>>> 1 = 01
>>>>> 2 = 02
>>>>> 3 = 03
>>>>>
>>>>> So consequently:
>>>>> 2002:c001:0203::/48
>>>>>
>>>>> We will use the first address of the prefix for
>>> the
>>>>> WAN interface, so
>>>>> 2002:c001:0203::1/128
>>>>>
>>>>> Also, the anycast address for 6to4 is:
>>> 192.88.99.1
>>>>> Following the same example as above, in IPv6 will
>>>>> be:
>>>>> 2002:c058:6301::/128
>>>>>
>>>>> For our example using a Loopback, we use
>>> 192.3.2.3,
>>>>> which in IPv6 will be
>>>>> 2002:0c03:0203::/128
>>>>>
>>>>> We show below two options for the 6to4 Relay. One
>>>>> basic configuration and
>>>>> another using the anycast address for 6to4. You
>>> just
>>>>> need to configure one
>>>>> of them (A or B).
>>>>>
>>>>>
>>>>> A) Example configuration of a basic 6to4 Relay
>>>>> =================================================
>>>>>
>>>>> This relay will only be reachable for hosts or
>>>>> routers with a manual
>>>>> configuration pointing to it.
>>>>>
>>>>> A1) Enable IPv6 in the router
>>>>>
>>>>> ipv6 unicast-routing
>>>>>
>>>>> A2) Ethernet0/0 interface configuration
>>> (obviously
>>>>> you can use another
>>>>> interface)
>>>>>
>>>>>  interface Ethernet0/0
>>>>>   description 6to4 Relay Service
>>>>>   ip address 192.1.2.3 255.255.255.0
>>>>>
>>>>> A3) ³tunnel 6to4² virtual interface
>>>>>
>>>>>   interface Tunnel2002
>>>>>   description 6to4 Relay Interface
>>>>>   no ip address
>>>>>   no ip redirects
>>>>>   ipv6 address 2002:c001:0203::1/128
>>>>>   tunnel source Ethernet0/0
>>>>>   tunnel mode ipv6ip 6to4
>>>>>
>>>>> A4) 6to4 prefix route
>>>>>
>>>>>   ipv6 route 2002::/16 Tunnel2002
>>>>>
>>>>>
>>>>> B) Example configuration of a 6to4 Relay with
>>>>> anycast support
>>>>>
>>>>
>>>
>> ===============================================================
>>>>>
>>>>> B1) Enable IPv6 in the router
>>>>>
>>>>> ipv6 unicast-routing
>>>>>
>>>>> B2) We use the loopback (recommended), but you
>>> could
>>>>> use an Ethernet
>>>>> Interface or any other one
>>>>>
>>>>>   interface Loopback0
>>>>>    description 6to4 Anycast Relay Service
>>>>>    ip address 192.88.99.1 255.255.255.0 secondary
>>>>>    ip address 192.3.2.3 255.255.255.255
>>>>>    ipv6 address 2002:c003:0203::1/128
>>>>>    ipv6 mtu 1480
>>>>>    no ipv6 mfib fast
>>>>>
>>>>> Note: When using IPv4 anycast addresses is
>>>>> recommended to configure
>>>>> explicitly the BGP/OSPF ID with a unicast
>>> address,
>>>>> otherwise, the router may
>>>>> take by default the anycast address as the ID.
>>>>>
>>>>> B3) ³tunel 6to4² virtual interface
>>>>>
>>>>>   interface Tunnel2002
>>>>>    description anycast 6to4 Relay Interface
>>>>>    no ip address
>>>
>> === message truncated ===
>>
>>
>>
>>
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