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<DIV><SPAN class=848441100-18012005><FONT face=Arial color=#0000ff
size=2>Sam,</FONT></SPAN></DIV>
<DIV><SPAN class=848441100-18012005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=848441100-18012005><FONT face=Arial color=#0000ff size=2>A
couple of things, I believe the 10k has a limit enforced via CLI when defining
the oversubscription factor (I think it is 50). In regards to the
preservation of PQ traffic under a oversubscription scenario, the 10k is able to
implement a back-pressure mechanism between the packet scheduler and the SAR
indicating what traffic should be dropped in congestion conditions. This
link is a little self-serving but it validates the 10k does this
correctly:</FONT></SPAN></DIV>
<DIV><SPAN class=848441100-18012005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=848441100-18012005><FONT face=Arial color=#0000ff size=2><A
href="http://www.miercom.com/dl.html?fid=20041015&type=report">http://www.miercom.com/dl.html?fid=20041015&type=report</A></FONT></SPAN></DIV>
<DIV><SPAN class=848441100-18012005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=848441100-18012005><FONT face=Arial color=#0000ff size=2>That
said, this type of implementation can get complicated and I would advise at
least consulting with your local account team on how best to implement this in
your network.</FONT></SPAN></DIV>
<DIV><SPAN class=848441100-18012005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=848441100-18012005><FONT face=Arial color=#0000ff size=2>hope
that helps,</FONT></SPAN></DIV>
<DIV><SPAN class=848441100-18012005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=848441100-18012005><FONT face=Arial color=#0000ff
size=2>Andy</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> Sam Meftahi
[mailto:SAF@sonofon.dk] <BR><B>Sent:</B> Monday, January 17, 2005 12:54
AM<BR><B>To:</B> aschutz@cisco.com; Benoit GRANGE;
cisco-bba@puck.nether.net<BR><B>Subject:</B> RE: [cisco-bba] ADSL shaping
using Hierarchical VP<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Hi
all<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Going thru this
document<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><SPAN class=content1><FONT face=Arial color=black
size=1><SPAN lang=EN-GB style="FONT-WEIGHT: bold; FONT-SIZE: 9pt"><A
href="http://www.cisco.com/en/US/products/hw/modules/ps2033/products_implementation_design_guide_chapter09186a0080199949.html#16529">http://www.cisco.com/en/US/products/hw/modules/ps2033/products_implementation_design_guide_chapter09186a0080199949.html#16529</A><o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Cisco states that
oversubscribed ports could experience cell drops due to colliding cells.
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Cells compete for
same time slot provided by SAR scheduler. And this can even occur in
underutilised ports links. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Does the algorithm
take into consideration all configured VCs or only the ones carrying traffic ?
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Either way, there
must be a restriction on how far can a link be overbooked without triggering a
high cell rate the scheduler would not cope with and starts dropping from
there.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">TIA<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Sam
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN lang=EN-US
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> Andy Schutz (aschutz)
[mailto:aschutz@cisco.com] <BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> 14. januar 2005 17:08<BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B> 'Benoit GRANGE'; Sam Meftahi;
cisco-bba@puck.nether.net<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> RE: [cisco-bba] ADSL shaping
using Hierarchical VP</SPAN></FONT><SPAN
lang=EN-US><o:p></o:p></SPAN></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Sam,</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Take a look at this
link: <A
href="http://www.cisco.com/en/US/partner/products/hw/routers/ps133/products_feature_guide09186a00802254b7.html">http://www.cisco.com/en/US/partner/products/hw/routers/ps133/products_feature_guide09186a00802254b7.html</A></SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">In regards to what is
recommended for oversubscription factors, I don't think there is a recommended
value. It depends on customer traffic patterns and how much you want to
guarantee each user. I have heard requirements for as little of 4:1
oversubscription to as high as 50:1 as stated in above
link. </SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Hope that
helps.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Andy</SPAN></FONT><o:p></o:p></P></DIV>
<BLOCKQUOTE
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0cm; BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0cm; MARGIN: 5pt 0cm 5pt 3.75pt; BORDER-LEFT: blue 1.5pt solid; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none">
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><FONT face=Tahoma
size=2><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original
Message-----<BR><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B>
cisco-bba-bounces@puck.nether.net [mailto:cisco-bba-bounces@puck.nether.net]
<B><SPAN style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Benoit
GRANGE<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Friday,
January 14, 2005 9:31 AM<BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B> Sam Meftahi;
cisco-bba@puck.nether.net<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> RE: [cisco-bba] ADSL shaping
using Hierarchical VP</SPAN></FONT><SPAN lang=EN-US><o:p></o:p></SPAN></P>
<DIV>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Hello,</SPAN></FONT><FONT
face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P></DIV>
<BLOCKQUOTE
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0cm; BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0cm; MARGIN: 5pt 0cm 5pt 3.75pt; BORDER-LEFT: blue 1.5pt solid; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none">
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Which category
service are u using? I am using nrt-VBR. <BR></SPAN></FONT><FONT
face=Arial color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">[Benoit
GRANGE] We also use this one (and it is the only one supported for
Hierarchical VP shaping).</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Does Cisco
recommend any Oversubscription or overbooking factors values for 7206VXR
or 10000.<BR></SPAN></FONT><FONT face=Arial color=blue size=2><SPAN
lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">[Benoit
GRANGE] I don't know.</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Otherwise, which
values is the general ISP community using without causing any
degradation?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">I thing it is
really up to you (and your market constraints).</SPAN></FONT><FONT
face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">To clarify what I
mean by Oversubscription, it is total SCR bandwidth exceeding line speed
and not number of VCs<o:p></o:p></SPAN></FONT></P></BLOCKQUOTE>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">You can not really
oversubscribe the number of VC being really in use (you may be able to
provision more than the card limit, but they may not be all used at the same
time).</SPAN></FONT><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> </SPAN></FONT><FONT face=Arial color=navy
size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Having Sum(SCR)
> Card badnwidth is possible in the Cisco 10k since release
12.3XI<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> </SPAN></FONT><FONT face=Arial color=navy
size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Benoît<o:p></o:p></SPAN></FONT></P></BLOCKQUOTE></DIV></BLOCKQUOTE></BODY></HTML>