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From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Drunen van,
Marcel
Subject: [Veritas-bu] Backup over WAN link & QoS
All,
Several of my customers are using WAN links in combination with Veritas
NetBackup 5.x, mainly Windows platforms. From time to time they have massive
problems, all errors seem to relate to dropped packages or other network
related stuff. Somebody at Veritas told me to configure QoS. I have heard it
mentioned before, but have no idea how to set up QoS. Anybody familiar with
it? Will it help?
Regards,
Marcel van Drunen
UNISYS The Netherlands
Marcel,
QoS is "Quality of Service" and is something you'd need to
configure on your "edge" routers (i.e. the ones that connect your sites to
their WAN links). Availability of QoS depends
On the type of link you have (e.g. ATM allows it but Frame Relay doesn't
AFAIK) and also on the routers you have.
The idea behind QoS is to create a "pipe within a pipe" so that
you can reserve a certain fraction of your WAN bandwidth to be used for
specified purposes. The inner pipe will have guaranteed bandwidth but
packets in the "outer pipe" will be subject to dropping as you are seeing
now. Voice over IP often needs QoS to work well, for example. The only
downside is that when the "inner pipe" (the NetBackup one in your case) is
not in use, its bandwidth cannot be "grabbed" for other purposes.
Good Luck!
Richard.
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<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'> =
veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] <b><span =
style=3D'font-weight:
bold'>On Behalf Of </span></b>Drunen van, Marcel<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> [Veritas-bu] =
Backup over
WAN link & QoS</span></font><o:p></o:p></p>
</div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>All,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Several of my customers are using WAN links in =
combination
with Veritas NetBackup 5.x, mainly Windows platforms. From time to time =
they
have massive problems, all errors seem to relate to dropped packages or =
other network
related stuff. Somebody at Veritas told me to configure QoS. I have =
heard it
mentioned before, but have no idea how to set up QoS. Anybody familiar =
with it?
Will it help?<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Regards,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DNL =
style=3D'font-size:10.0pt;
font-family:Arial'>Marcel van Drunen<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DNL =
style=3D'font-size:10.0pt;
font-family:Arial'>UNISYS The Netherlands<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p>=
</span></font></p>
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<p class=3DMsoNormal style=3D'border:none;padding:0cm'><font size=3D2 =
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</span></font></p>
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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p>=
</span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>Marcel,<o:p></o:p=
></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>  =
; QoS
is “Quality of Service” and is something you’d need to
configure on your “edge” routers (i.e. the ones that connect =
your
sites to their WAN links). Availability of QoS =
depends<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>On the type of =
link you
have (e.g. ATM allows it but Frame Relay doesn’t AFAIK) and also =
on the
routers you have. <o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p>=
</span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>  =
; The
idea behind QoS is to create a “pipe within a pipe” so that =
you can
reserve a certain fraction of your WAN bandwidth to be used for =
specified
purposes. The inner pipe will have guaranteed bandwidth but packets in =
the “outer
pipe” will be subject to dropping as you are seeing now. Voice =
over IP often
needs QoS to work well, for example. The only downside is that =
when the “inner
pipe” (the NetBackup one in your case) is not in use, its =
bandwidth
cannot be “grabbed” for other =
purposes.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p>=
</span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>Good =
Luck!<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p>=
</span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>Richard.<o:p></o:=
p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DNL
style=3D'font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p>=
</span></font></p>
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