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IPv6/ATM - how?
- Subject: IPv6/ATM - how?
- From: [email protected] (Francis Dupont)
- Date: Fri, 24 Nov 2000 14:22:28 +0100
- In-reply-to: Your message of Mon, 20 Nov 2000 13:33:37 +0100. <[email protected]>
In your previous mail you wrote:
Which protocol (MPOA, LANE, IPv4/CLIP, ...) is normally used on
IPv6 ATM point to point links?
=> you can use some encapsulation on PVC (usually AAL5 SNAP, aka RFC 1483),
LANE (which is transparent) or RFC 2492 (but RFC 2492 implementations are
*very* uncommon). I think you should use AAL5 SNAP on PVC because it is
the easiest and the most common.
In Cisco Commands.txt.19991126 file I see such example
atm pvc 1 <VPI> <VCI> aal5snap
ipv6 5F00:6D00::5 atm-vc 1
=> this is AAL5 SNAP over PVCs.
In TEN-155 Telebit router configuration
there are entries like
# IPv6 OVER ATM, WAN INTERFACE
ip access ACOnet -local 3ffe:8038:80:1::1 -peer 3ffe:8038:80:1::2 -mtu 9180
ip atunnel -encapsulation 2 -vci 99
ip bgp -peer 3ffe:8038:80:1::2 -ipv6 -rfc2283 1
What is 'atunnel'?
=> my Telebit documentation is not open but I believe this is the symmetric
of the Cisco example.
I plan to run long distance IPv6/ATM and I wonder what is the most
=> for long distance you should use some kind of PVCs...
It could be e.g. Linux-Telebit or Linux-Cisco connection so
interoperabity is important.
=> then static AAL5 SNAP over PVCs is the way to go.
Now I see tunneling IPv6/IPv4/CLIP as the only alternative.
=> don't joke. The cell tax is enough...
RFC 2492 seems to be something what could be used instead of tunneling,
kind of IPv6 CLIP but it is not implemented on Linux.
=> I confirm. And RFC 2492 is more for LANs than WANs (ie. as in CLIP
no QoS is associated to SVCs).
distance LANE can be administratively difficult for us. I still do not
understand MPOA enough to know if it could an option here.
=> I disagree, you understand MPOA enough (:-)!
PS: there are many IPv6 over ATM in Europe for long distance connections
(for instance the new G6 infrastructure or the Ten-155 IPv6 testbed).
You should find easily some help as the same equipments (Cisco, Telebit
and Linux) are commonly used.