Re: [RRG] FLOWv6: IPv6 Flow Label to control DFZ forwarding

[Iljitsch van Beijnum <iljitsch@muada.com>]

On 31 jul 2008, at 14:39, Robin Whittle wrote:

> I woke up this morning thinking:

>    The IPv6 Flow Label isn't being used.
>      How many bits is it??
>         20 . . . . !!!!

So far, so good. However, you continue for another 50 kilobytes. I  
gave up at this point:

> Terminology
> -----------

>   Conventional networks
>   SEN - Scalable End-user Network
>   SPI - Scalable PI - address space
>   Micronet
>   UAB - User Address Block
>   MAB - Mapped Address Block
>   IFR - Ingress Flow Router.
>   IFRC - IFR with Cache
>   IFRH - IFR function in sending Host
>   OIFRD - Open Ingress Flow Router in the DFZ.
>   EFR - Egress Flow Router
>   FPER - Flow Path Exit Router
>   EBP - EFR Block Prefix
>   Mapping system
>   QSD - Query Server with full Database
>   QSC - Query Server with Cache

If you're going to invent a new way to bypass routing table lookups by  
using a 20 bit tag, at least make it _simpler_ than MPLS.

PLEASE realize that:

- IETF/IRTF participants have ample background knowledge
- we need to know some details about your solution, not 10 years  
future work
- terminology sections that don't fit in short term memory don't work
- a half decent simple solution wins from a very good complex one  
every time
- there are only 24 hours in a day
- this is the rrg mailinglist, not the internet-drafts repository

With that out of the way: your solution is basically a subset/ 
optimization of MPLS. Earlier, requiring MPLS was categorized as a non- 
starter. Not sure if I agree with that, MPLS implementations are  
widely available and running MPLS without too much overhead in the  
form of signaling protocols seems like a fair tradeoff to gain routing  
scalability to me.

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