Re: [OSPF] I-D Action: draft-ietf-ospf-rfc3137bis-01.txt

[Acee Lindem <[e-mail]>]

Alvaro,

On Jul 2, 2012, at 11:05 AM, Retana, Alvaro wrote:

> Acee:
> 
>> -----Original Message-----
>> From: Acee Lindem [mailto:[e-mail]]
>> Sent: Monday, July 02, 2012 9:56 AM
> ...
>>>> -move R-bit to solution from Deployment Considerations
>>>> ex.)
>>>> 3.  Proposed Solution
>>>> 3-1.maximum metric
>>>> 3-2.R-bit
>>>> 
>>>> What do you think of my recommendation?
>>> 
>>> 3173 is about documenting the MaxLinkMetric approach, which is why we
>> chose to reference the R-bit as other solutions.  3137 is not about
>> comparing or describing the full functionality of the different
>> approaches.
>> 
>> The main we respin RFCs is to incorporate changes and there is no
>> reason not to document the R-bit mechanism to accomplish the OSPFv3
>> stub router function.
> 
> Besides from the reference (see below), what else do you think we should include?
> 
> The point I'm trying to make is: rfc5340 already defines and documents the R-bit functionality (and it is the standard!).  IMHO, there is no need to rehash here what is already defined and explained somewhere else...which is why I think the reference is enough.

I don't think you have to describe the mechanism. However, I agree R-bit should be on equal ground as the max-metric links. Also, it would be good to point out the difference in behavior. With max-metric links, transit traffic is discouraged while with the R-bit, transit traffic is completely suppressed. 

Thanks, 
Acee 



> 
> Thanks!
> 
> Alvaro.
> 
> 
> 4.1.  Other Solutions
> 
>   This document describes a technique that has been implemented and
>   deployed in a wide variety of networks.  OSPFv3 [RFC5340] introduced
>   additional options to provide similar, if not better, control of the
>   forwarding topology; the R-bit and the V6-bit provide a more granular
>   indication of whether a router is active and/or whether it should be
>   used specifically for IPv6 traffic, respectively.
> 
>   It is left to network operators to decide which technique to use in
>   their network.
> 
>