Hi Michal,

theres some confusion on your question. first of all you wont get that easy
an AS number from you regional internet registry. :)
The classic definition of autonomous system is a set of routers using an
interior routing protocol to route packets within that AS and using exterior
(BGP) protocol for routing packets to others ASes (RFC 1771).  Usually these
AS number are reserved for providers dealing with at least 2 peering
neighbors (running multi-homed, maybe CIDR block, routing policy for that
block...). How to use AS number is described in RFC1930. I recommend reading
both. AS number 64512 through 65535 are defined as private AS number.
Private As number must not to be advertised on the global internet. AS
numbers to owner mapping are available to public. (whois your RIR)

Beside that, theres some config error. When you connect to a BGP+4 peer over
an IPv6 link-local address, you have to specify the ifname of the interface
used for the connection.

 # BGP Command: neighbor PEER remote-as AS-Number
>  neighbor 3ffe:506:1000::2 remote-as 7675

Theres no need trying to peer to your local AS. You have to annouce your own
network. (actually router bgp 7675 is /your bgp process)

just a quick dump, no clarification :]

Cheers
Josip Eremut


----- Original Message -----
From: "Michal Ludvig" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Tuesday, July 09, 2002 2:47 PM
Subject: BGP confusion


> Hi all,
> I'm a little confused about using the AS numbers in IPv6 sites. Here is
> a part of the zebra's example:
>
> router bgp 7675
>  neighbor 3ffe:506:1000::2 remote-as 7675
>  neighbor 3ffe:506:1000::2 next-hop-self
>  neighbor fe80::200:c0ff:fe30:9be3 remote-as 9377
>  neighbor fe80::200:c0ff:fe30:9be3 interface sit3
>  neighbor fe80::210:5aff:fe6b:3cee remote-as 7675
>  neighbor fe80::210:5aff:fe6b:3cee interface eth0
>  neighbor fe80::290:27ff:fe51:84c7 remote-as 4691
>  neighbor fe80::290:27ff:fe51:84c7 interface sit7
> [...]
>
> If I understand it correctly, the 7675, 9377 and 4691 are numbers of
> autonomous systems. But how do I get an AS number of an IPv6 site?
>
> I'm about to set up BGP routing first inside my IPv6 network and then
> perhaps even for external tunnels, but what AS number should I use for my
> internal network with a prefix obtained from xs26.net? Is that an AS
> number of IPv4 address of my "border" router?
>
> Thanks in advance for clarifying this issue.
>
> Michal Ludvig
> --
> http://www.ipv6.logix.cz
>
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