[afripv6-discuss] Configuring a 6to4 Relay in Cisco
JORDI PALET MARTINEZ
jordi.palet at consulintel.es
Sun Jun 10 10:11:45 SAST 2007
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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