[37709] in Resnet-Forum
Re: To Shape or not to shape - shaping by behavior
daemon@ATHENA.MIT.EDU (Andrew Wolf)
Tue Dec 4 10:39:59 2012
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Message-ID: <D6AE4526AE192B4592161988CA31B8FC2356C5CD@maildb.wfo.linfield.edu>
Date: Tue, 4 Dec 2012 15:39:17 +0000
Reply-To: Resnet Forum <RESNET-L@LISTSERV.ND.EDU>
From: Andrew Wolf <awolf@linfield.edu>
To: RESNET-L@LISTSERV.ND.EDU
In-Reply-To: <AFF7E56B606814458FDD73793322334935F4C283@SV-EXCMB-01.principia.local>
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Usage will continually increase to use all available bandwidth..... does an=
yone remember when 40 Meg Hard drive was so enormous that you couldn't unde=
rstand why you would ever need more than that?
For anyone interested in behavior-based shaping - here a few observations =
that I've compiled. I'm sure there is much more scientific data out there;=
these are strictly my observations and opinions. We are running a NetEqua=
lizer with 300 Mbps Metro-E pipe; Residential College with ~3500 active us=
ers, ~6-8k active devices; entire campus shares the same pipe. "Bandwidth P=
ools" are used for Resnet, Admin, Public, and the server farm - all email, =
distance learning, web servers etc. are hosted internally.
About 12% of our student users are the 'problem' users from either a bandwi=
dth hog perspective or massive connections perspective. I don't know if th=
ey are aware of it; I'm sure some of them are. The bulk of our users don't =
make a massive number of connections; and they don't use a great deal of ba=
ndwidth. We have implemented connection limits on both the wired and wirel=
ess users, wireless users are allowed 20 (10up/10down); wired are 30(15/15)=
and the gamer network users are allowed 60 (30/30) - This has been in pl=
ace for over a year now and has probably been the single most effective too=
l for cleaning up the bandwidth usage. By eliminating superfluous connecti=
ons, (most end users don't even realize that their machine try to make thes=
e many connections) our overall internet pipe runs much cleaner simply by p=
utting these limits in place. Our equipment tracks each connection and keep=
s each user within the limits. To be clear, these "connection limits" cann=
ot be compared to connections showing in your firewalls - Our Netequalizer =
only tracks connections that have been active in the last second or two; no=
t the 5 min averages that you see in connection tables in the firewalls. 8=
8% of our users doing 'normal' browsing and internet use keep well under th=
ese simultaneous limits. Our P2P file sharing is almost non-existent since=
the connection limits were put in place; our copyright notice count is dow=
n to 1 in the last year. We still have a few problem children who insist on=
skirting the limits by using a hosted VPN tunnel; but they have to spend m=
oney to do so. These VPN tunnels also get caught as "bandwidth hogs" and ge=
t slowed down when bandwidth saturates. Keeping connection limits further =
tightened down on wireless users has improved wireless performance a great =
deal.
Using "bandwidth pools" allows end user performance during non-peak times t=
o be absolutely stunning. Rather than restricting users to a rate cap, poo=
ling a group of IP addresses to a maximum combined rate allows individuals =
to take advantage of the performance available. When bandwidth hits approx.=
85% of the pool limit, those users that are identified has "Hogs" (using o=
ver 2 Mbps in our case) begin to get slowed fractionally until their usage =
slows down a bit to keep it fair for everyone. Most end users don't even n=
otice this slowing, unless they are downloading very large files and are mo=
nitoring their usage. Since the sending end (in case of a download) is unp=
redictable in their sending rates, the end users receive as fast as possibl=
e, while allowing everyone that same general user experience. Further, sm=
all bandwidth users (even those using Skype) who are under the "Hog" minimu=
m, continue untouched by the NetEqualizer - since this is on an IP to IP co=
nnection basis, anyone's connection that is under the minimum is generally =
allowed to pass without penalty. So instead of rate capping all users, and=
keeping them restricted even during non-peak times; when the bandwidth is =
available, they get blazing performance and can use as much as possible. T=
his seems to be the best of both worlds, and our end user complaints have b=
een virtually eliminated. As a side note, I have one student who is workin=
g his way through college by doing movie editing; he now schedules his down=
load/upload activities in the 3:00 am - 6:00am timeframe when he can obtain=
100-150 Mbps to his hosted server. We are now both much happier that he's=
not trying to do this at 11pm (or the middle of the work day); and it only=
takes him minutes instead of hours to complete his transfers.
If anyone needs further clarification; has comments or questions...please f=
eel free to respond; there may be benefits to others if we keep the convers=
ation open on the forum.
Andrew Wolf
Linfield College
McMinnville, OR
From: Resnet Forum [mailto:RESNET-L@LISTSERV.ND.EDU] On Behalf Of Chris Dav=
is
Sent: Friday, November 30, 2012 7:53 AM
To: RESNET-L@LISTSERV.ND.EDU
Subject: Re: To Shape or not to shape
Gregory. I was in the same place you were last spring. Due to increasing =
bandwidth I was looking at significant licensing and hardware replacement o=
f our shapers. I was also beginning to see the end of the tunnel in terms =
of deep packet inspection with regard to prioritization of traffic. We had=
been changing what we wanted out of our shaper from prioritization to equa=
lization. While we wanted to prioritize by application on some things, wha=
t we really wanted was to share the bandwidth equally between our users, re=
snet and other. While I couldn't do everything I wanted with the NetEq, I =
found that those things I wanted to do, I really didn't need to do. We hav=
e been up on ours for about 7 months now, and we have had nothing but a ter=
rific experience.
In the midst of this I also took some data on user population to bandwidth =
(Mbit/second) and found that with any kind of packet shaping, the sweet spo=
t of user/bandwidth ratio was 4:1. I also heard from many that were higher=
than that, 6:1, 8:1, 10:1 even as high as 20:1. We run at 6:1 and 9:1 on =
our two campuses. There have been no significant complaints.
I see that Andrew Wolf has responded to your message as well. He was the =
one that convinced me to get an eval and give it a test drive.
The one problem I have with the NetEq is that the network interfaces aren't=
pass through by default. I got very used to that with our shaper. You ei=
ther have to set up your own switches to bypass it in the event of a failur=
e, or buy a solution from them that does basically the same thing. Other t=
han that small complaint, I have had no problems and more importantly almos=
t no bandwidth help desk calls! That's the big plus. Plus it is very eas=
y to manage. I hardly ever touch mine. I just monitor them with the new D=
ashboard interface.
Chris
Chris Davis
The Principia
From: Resnet Forum [mailto:RESNET-L@LISTSERV.ND.EDU] On Behalf Of Crary, Gr=
egory
Sent: Thursday, November 29, 2012 10:57 PM
To: RESNET-L@LISTSERV.ND.EDU
Subject: To Shape or not to shape
Good evening all,
We are in the process of trying to decide whether or not to upgrade or all =
together remove our packet shaper from our residence hall network. My netw=
ork engineers are confident we can accomplish rate limiting/shaping through=
use of our core equipment, but I am not convinced removing the appliance w=
ill turn out well.
So...what are other universities using a packet shaper for and if you no lo=
nger use it, why did you remove it and what is its place?
Thanks!
Greg
--
Gregory T. Crary
Director, Customer Support Systems
Office of information Technology
Eastern Washington University
gcrary@ewu.edu<mailto:gcrary@ewu.edu> | 509.359.2375
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<div class=3D"WordSection1">
<p class=3D"MsoNormal" style=3D"margin-bottom:10.0pt;line-height:115%"><spa=
n style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri"=
;,"sans-serif"">Usage will continually increase to use all availa=
ble bandwidth….. does anyone remember when 40 Meg Hard drive
was so enormous that you couldn’t understand why you would ever need=
more than that?<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:10.0pt;line-height:115%"><spa=
n style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri"=
;,"sans-serif"">For anyone interested in behavior-based shaping &=
#8211; here a few observations that I’ve compiled. I̵=
7;m sure there
is much more scientific data out there; these are strictly my observations=
and opinions. We are running a NetEqualizer with 300 Mbps Metro-E pi=
pe; Residential College with ~3500 active users, ~6-8k active devices=
; entire campus shares the same pipe. “Bandwidth
Pools” are used for Resnet, Admin, Public, and the server farm ̵=
1; all email, distance learning, web servers etc. are hosted internally.<o:=
p></o:p></span></p>
<p class=3D"MsoNormalCxSpMiddle" style=3D"margin-bottom:10.0pt;line-height:=
115%"><span style=3D"font-size:11.0pt;line-height:115%;font-family:"Ca=
libri","sans-serif"">About 12% of our student users are the =
‘problem’ users from either a bandwidth hog perspective or
massive connections perspective. I don’t know if they are awar=
e of it; I’m sure some of them are. The bulk of our users don’t=
make a massive number of connections; and they don’t use a great dea=
l of bandwidth. We have implemented connection limits on both
the wired and wireless users, wireless users are allowed 20 (10up/10down);=
wired are 30(15/15) and the gamer network users are allowed 60 (30/30)&nbs=
p; - This has been in place for over a year now and has probably been=
the single most effective tool for cleaning
up the bandwidth usage. By eliminating superfluous connections, (mos=
t end users don’t even realize that their machine try to make these m=
any connections) our overall internet pipe runs much cleaner simply by putt=
ing these limits in place. Our equipment tracks
each connection and keeps each user within the limits. To be clear, =
these “connection limits” cannot be compared to connections sho=
wing in your firewalls – Our Netequalizer only tracks connections tha=
t have been active in the last second or two; not the 5
min averages that you see in connection tables in the firewalls. 88%=
of our users doing ‘normal’ browsing and internet use keep wel=
l under these simultaneous limits. Our P2P file sharing is almost non=
-existent since the connection limits were put in place;
our copyright notice count is down to 1 in the last year. We still have a =
few problem children who insist on skirting the limits by using a hosted VP=
N tunnel; but they have to spend money to do so. These VPN tunnels also get=
caught as “bandwidth hogs” and
get slowed down when bandwidth saturates. Keeping connection limits =
further tightened down on wireless users has improved wireless performance =
a great deal.<o:p></o:p></span></p>
<p class=3D"MsoNormalCxSpMiddle" style=3D"mso-margin-top-alt:0in;margin-rig=
ht:0in;margin-bottom:10.0pt;margin-left:.5in;line-height:115%">
<span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&=
quot;,"sans-serif""><o:p> </o:p></span></p>
<p class=3D"MsoNormalCxSpMiddle" style=3D"margin-bottom:10.0pt;line-height:=
115%"><span style=3D"font-size:11.0pt;line-height:115%;font-family:"Ca=
libri","sans-serif"">Using “bandwidth pools” all=
ows end user performance during non-peak times to be absolutely stunning.&n=
bsp;
Rather than restricting users to a rate cap, pooling a group of IP address=
es to a maximum combined rate allows individuals to take advantage of the p=
erformance available. When bandwidth hits approx. 85% of the pool limit, th=
ose users that are identified has
“Hogs” (using over 2 Mbps in our case) begin to get slowed fra=
ctionally until their usage slows down a bit to keep it fair for everyone.&=
nbsp; Most end users don’t even notice this slowing, unless they are =
downloading very large files and are monitoring their usage.
Since the sending end (in case of a download) is unpredictable in their se=
nding rates, the end users receive as fast as possible, while allowing ever=
yone that same general user experience. Further, small bandwidt=
h users (even those using Skype) who are under
the “Hog” minimum, continue untouched by the NetEqualizer R=
11; since this is on an IP to IP connection basis, anyone’s connectio=
n that is under the minimum is generally allowed to pass without penalty.&n=
bsp; So instead of rate capping all users, and keeping them restricted
even during non-peak times; when the bandwidth is available, they get blaz=
ing performance and can use as much as possible. This seems to be the=
best of both worlds, and our end user complaints have been virtually elimi=
nated. As a side note, I have one student
who is working his way through college by doing movie editing; he now sche=
dules his download/upload activities in the 3:00 am – 6:00am timefram=
e when he can obtain 100-150 Mbps to his hosted server. We are now bo=
th much happier that he’s not trying to do
this at 11pm (or the middle of the work day); and it only takes him minute=
s instead of hours to complete his transfers.<o:p></o:p></span></p>
<p class=3D"MsoNormalCxSpMiddle" style=3D"mso-margin-top-alt:0in;margin-rig=
ht:0in;margin-bottom:10.0pt;margin-left:.5in;line-height:115%">
<span style=3D"font-size:11.0pt;line-height:115%;font-family:"Calibri&=
quot;,"sans-serif""><o:p> </o:p></span></p>
<p class=3D"MsoNormalCxSpMiddle" style=3D"margin-bottom:10.0pt;line-height:=
115%"><span style=3D"font-size:11.0pt;line-height:115%;font-family:"Ca=
libri","sans-serif"">If anyone needs further clarification; =
has comments or questions…please feel free to respond; there
may be benefits to others if we keep the conversation open on the forum.<o=
:p></o:p></span></p>
<p class=3D"MsoNormalCxSpMiddle" style=3D"margin-bottom:10.0pt;line-height:=
115%"><span style=3D"font-size:11.0pt;line-height:115%;font-family:"Ca=
libri","sans-serif""><o:p> </o:p></span></p>
<p class=3D"MsoNormalCxSpMiddle" style=3D"margin-bottom:10.0pt;line-height:=
115%"><span style=3D"font-size:11.0pt;line-height:115%;font-family:"Ca=
libri","sans-serif"">Andrew Wolf<o:p></o:p></span></p>
<p class=3D"MsoNormalCxSpMiddle" style=3D"margin-bottom:10.0pt;line-height:=
115%"><span style=3D"font-size:11.0pt;line-height:115%;font-family:"Ca=
libri","sans-serif"">Linfield College<o:p></o:p></span></p>
<p class=3D"MsoNormalCxSpMiddle" style=3D"margin-bottom:10.0pt;line-height:=
115%"><span style=3D"font-size:11.0pt;line-height:115%;font-family:"Ca=
libri","sans-serif"">McMinnville, OR<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca=
libri","sans-serif";color:#1F497D"><o:p> </o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca=
libri","sans-serif";color:#1F497D"><o:p> </o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:"=
;Tahoma","sans-serif"">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:"Tahoma","sans-serif""> Resnet F=
orum [mailto:RESNET-L@LISTSERV.ND.EDU]
<b>On Behalf Of </b>Chris Davis<br>
<b>Sent:</b> Friday, November 30, 2012 7:53 AM<br>
<b>To:</b> RESNET-L@LISTSERV.ND.EDU<br>
<b>Subject:</b> Re: To Shape or not to shape<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Calibri","=
;sans-serif";color:#1F497D">Gregory. I was in the same place you=
were last spring. Due to increasing bandwidth I was looking at signi=
ficant licensing and hardware replacement of our shapers. I was also
beginning to see the end of the tunnel in terms of deep packet inspection =
with regard to prioritization of traffic. We had been changing what w=
e wanted out of our shaper from prioritization to equalization. While=
we wanted to prioritize by application on
some things, what we really wanted was to share the bandwidth equally betw=
een our users, resnet and other. While I couldn’t do everything=
I wanted with the NetEq, I found that those things I wanted to do, I reall=
y didn’t need to do. We have been up on ours
for about 7 months now, and we have had nothing but a terrific experience.=
<o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Calibri","=
;sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Calibri","=
;sans-serif";color:#1F497D">In the midst of this I also took some data=
on user population to bandwidth (Mbit/second) and found that with any kind=
of packet shaping, the sweet spot of user/bandwidth ratio
was 4:1. I also heard from many that were higher than that, 6:1, 8:1=
, 10:1 even as high as 20:1. We run at 6:1 and 9:1 on our two campuse=
s. There have been no significant complaints.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Calibri","=
;sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Calibri","=
;sans-serif";color:#1F497D">I see that Andrew Wolf has responded to yo=
ur message as well. He was the one that convinced me to get an =
eval and give it a test drive.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Calibri","=
;sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Calibri","=
;sans-serif";color:#1F497D">The one problem I have with the NetEq is t=
hat the network interfaces aren’t pass through by default. I go=
t very used to that with our shaper. You either have to set up your
own switches to bypass it in the event of a failure, or buy a solution fro=
m them that does basically the same thing. Other than that small comp=
laint, I have had no problems and more importantly almost no bandwidth help=
desk calls! That’s the big plus.
Plus it is very easy to manage. I hardly ever touch mine. I ju=
st monitor them with the new Dashboard interface.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Calibri","=
;sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div style=3D"border:none;border-bottom:solid windowtext 1.0pt;padding:0in =
0in 1.0pt 0in">
<p class=3D"MsoNormal"><span style=3D"font-family:"Calibri","=
;sans-serif";color:#1F497D">Chris<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-family:"Calibri","=
;sans-serif";color:#1F497D">Chris Davis<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Calibri","=
;sans-serif";color:#1F497D">The Principia<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"></a><span style=3D"font-=
size:11.0pt;font-family:Papyrus;color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:"=
;Tahoma","sans-serif"">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:"Tahoma","sans-serif""> Resnet F=
orum [mailto:RESNET-L@LISTSERV.ND.EDU]
<b>On Behalf Of </b>Crary, Gregory<br>
<b>Sent:</b> Thursday, November 29, 2012 10:57 PM<br>
<b>To:</b> RESNET-L@LISTSERV.ND.EDU<br>
<b>Subject:</b> To Shape or not to shape<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><o:p> </o:p></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black">Good evening all,<o:p></o:p=
></span></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black"><o:p> </o:p></span></p=
>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black">We are in the process of tr=
ying to decide whether or not to upgrade or all together remove our packet =
shaper from our residence hall network. My network engineers
are confident we can accomplish rate limiting/shaping through use of our c=
ore equipment, but I am not convinced removing the appliance will turn out =
well.<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black"><o:p> </o:p></span></p=
>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black">So…what are other uni=
versities using a packet shaper for and if you no longer use it, why did yo=
u remove it and what is its place?<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black"><o:p> </o:p></span></p=
>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black">Thanks!<o:p></o:p></span></=
p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black">Greg<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black">--<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black">Gregory T. Crary<o:p></o:p>=
</span></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black">Director, Customer Support =
Systems<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black">Office of information Techn=
ology<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black">Eastern Washington Universi=
ty<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black"><a href=3D"mailto:gcrary@ew=
u.edu">gcrary@ewu.edu</a> | 509.359.2375<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:"Ca=
libri","sans-serif";color:black"><o:p> </o:p></span></p=
>
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