Re: BGP path hunting, MRAI timer and Path Length Damping

On Jun 21, 2007, at 5:51 AM, ksriramnist.gov wrote:

> Based on this one might infer that BGP routers have
implemented
> "not applying MRAI to withdrawals" for a
fairly long time (prior to  
> RFC 4271).
> To what extent have router vendors updated and deployed
the MRAI
> per RFC 4271 (so that MRAI does indeed apply to
withdrawals)?
> Tony: Can you please share with us your thoughts on
this?


I'm afraid that I can't claim to have a useful opinion.

I can tell you that historically, certain implementations
never  
implemented MRAI at all, and another implementation did a
very  
simplistic implementation.  However, my involvement at the 

development level basically stopped in 1994, except for a
very brief  
stint in 2005.

It would be far more accurate if the current maintainers of 

implementations were to step up and describe the behavior of
their  
implementations currently.  Yes, I realize that there are
competitive  
pressures that work against this, so some may be
understandably  
reluctant.

Regards,
Tony

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You could also look at RFC4276, the BGP4 implementation
report, which
gives some details for four implementations.

Tom Petch

----- Original Message ----- 
From: "Tony Li" <tlicisco.com>
To: <ksriramnist.gov>
Cc: "idr" <idrietf.org>; "Robin
Whittle" <rwfirstpr.com.au>
Sent: Friday, June 22, 2007 12:40 AM
Subject: [Idr] Re: BGP path hunting, MRAI timer and Path
Length Damping


> 
> On Jun 21, 2007, at 5:51 AM, ksriramnist.gov
wrote:
> 
> > Based on this one might infer that BGP routers
have implemented
> > "not applying MRAI to withdrawals" for a
fairly long time (prior to  
> > RFC 4271).
> > To what extent have router vendors updated and
deployed the MRAI
> > per RFC 4271 (so that MRAI does indeed apply to
withdrawals)?
> > Tony: Can you please share with us your thoughts
on this?
> 
> 
> I'm afraid that I can't claim to have a useful
opinion.
> 
> I can tell you that historically, certain
implementations never  
> implemented MRAI at all, and another implementation did
a very  
> simplistic implementation.  However, my involvement at
the  
> development level basically stopped in 1994, except for
a very brief  
> stint in 2005.
> 
> It would be far more accurate if the current
maintainers of  
> implementations were to step up and describe the
behavior of their  
> implementations currently.  Yes, I realize that there
are competitive  
> pressures that work against this, so some may be
understandably  
> reluctant.
> 
> Regards,
> Tony
> 
> _______________________________________________
> Idr mailing list
> Idrietf.org
> https://ww
w1.ietf.org/mailman/listinfo/idr

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