I can confirm that they are definitely not lying about ‘degraded performance’ 
when you get your shaper config “wrong”.

That being said, I’m not sure what actual impact it will have on such a 
low-bandwidth circuit either.

- Jacob Bisby

 

From: AusNOG <ausnog-boun...@lists.ausnog.net> On Behalf Of David Fowler
Sent: Thursday, 24 May 2018 3:33 PM
To: Brad Henshaw <hen...@gmail.com>
Cc: ausnog@lists.ausnog.net
Subject: Re: [AusNOG] ASR 903 Shaping

 

Hi Brad

 

I think we do. Telstra pretty explicit saying this is required else “you’ll 
experience degraded performance”. Their 4Mb EA spec wants a 32000 bit BC when 
the shaper can only be configured with a minimum 60000.

 

 

Regards,

 

David Fowler

Infrastructure Engineer – Enterprise Operations

 

From: Brad Henshaw <hen...@gmail.com <mailto:hen...@gmail.com> >
Date: Thursday, 24 May 2018 at 15:07
To: David Fowler <david.fow...@datacom.com.au 
<mailto:david.fow...@datacom.com.au> >
Cc: "ausnog@lists.ausnog.net <mailto:ausnog@lists.ausnog.net> " 
<ausnog@lists.ausnog.net <mailto:ausnog@lists.ausnog.net> >
Subject: Re: [AusNOG] ASR 903 Shaping

 

Hi David, 

 

It may be worth reviewing whether you really need to specify Bc in your shaper 
policy. It was a while ago but I recall when working with the ASR920 I found 
the burst values automatically calculated by IOS (without manually specifying 
Bc/Be) worked pretty effectively when using 'shape average' in multi-level 
policies. I haven't touched a 903 however so don't know if its behaviour is 
different.

 

Regards,

Brad

 

 

On Thu, May 24, 2018 at 3:37 PM, David Fowler <david.fow...@datacom.com.au 
<mailto:david.fow...@datacom.com.au> > wrote:

Hi folks

 

Does anyone know if it’s possible to enter in a lower BC value in a Shaping 
policy? Seems with this platform the lowest is 60000 bits… this doesn’t help 
when we need to configure 4Mbps Telstra EA policies…

 

Maybe a different software version?

 

Regards,

 

David Fowler

Infrastructure Engineer – Enterprise Operations

 

 

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