Ethereal-dev: Re: [Ethereal-dev] IPv6 over MPLS coding

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From: Ashok Narayanan <ashokn@xxxxxxxxx>
Date: Wed, 7 Nov 2001 16:30:58 -0500
On Thu, 8 Nov 2001 08:27:30 +1100, Hamish Moffatt <hamish@xxxxxxxxxxxx> wrote:

> On Wed, Nov 07, 2001 at 04:21:06PM -0500, Ashok Narayanan wrote:
> > The interior encapsulation of data within an MPLS packet is signalled by
> > out-of-band protocols. So there's no way to determine what the packet is.
It
> > could be another MPLS label, IPv4, IPv6, Ethernet, ATM, Frame Relay - just
> > about anything. It is MultiProtocol Label Switching, after all.
> > 
> > I don't know how you can do a packet-by-packet decision :-(
> 
> I concur. Do you think that looking at the IP version field
> (as in my patch) is better than just assuming IPv4?

Yeah, I guess. Gives us a 1-in-8 chance to get it right, instead of just
blindly assuming.

-Ashok

> 
> 
> regards,
> Hamish
> -- 
> Hamish Moffatt VK3SB <hamish@xxxxxxxxxx> <hamish@xxxxxxxxxxxx>
> 
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--- Asok the Intern ----------------------------------------
Ashok Narayanan
IOS Network Protocols, Cisco Systems
250 Apollo Drive, Chelmsford, MA 01824
Ph: 978-244-8387.  Fax: 978-244-8126 (Attn: Ashok Narayanan)