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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>In practice has anyone seen a QoS policy protecting the SQL
intercluster communication/replication? Cisco Engineer is worried about SQL
replication in a large cluster design. All links meet the 40ms Cluster Across
WAN requirement, but he’d like to take it further. I’m not sure if
it’s a good idea.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a00801ffe28.shtml<o:p></o:p></span></font></p>
<h4><a name=d><b><font size=2 color=black face="Times New Roman"><span
style='font-size:10.0pt'>Intra-cluster Communications</span></font></b></a><font
size=2><span style='font-size:10.0pt'> <o:p></o:p></span></font></h4>
<p><font size=2 color=black face="Times New Roman"><span style='font-size:10.0pt;
color:black'>This is traffic between Cisco CallManager nodes/servers
themselves, and includes things like Cisco CallManager and computer telephony
integration (CTI) Manager SDL communications, SQL replication, Server Message
Block (SMB) communications and CTI/Quick Buffer Encoding (QBE) activities. If
you have a Layer 3 device that separates Cisco CallManager nodes (by either WAN
or LAN), you must have a maximum Round Trip Time (RTT) of 40 ms, or 20 ms delay
in either direction. <o:p></o:p></span></font></p>
<p style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 color=black face=Symbol><span style='font-size:10.0pt;font-family:Symbol;
color:black'><span style='mso-list:Ignore'>·<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 color=black><span
style='font-size:10.0pt;color:black'>Database replication from publisher to
subscriber uses best effort (DSCP=0) by default. <o:p></o:p></span></font></p>
<p style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 color=black face=Symbol><span style='font-size:10.0pt;font-family:Symbol;
color:black'><span style='mso-list:Ignore'>·<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 color=black><span
style='font-size:10.0pt;color:black'>Directory traffic from the LDAP directory
also uses best effort packet marking. <o:p></o:p></span></font></p>
<p style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 color=black face=Symbol><span style='font-size:10.0pt;font-family:Symbol;
color:black'><span style='mso-list:Ignore'>·<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 color=black><span
style='font-size:10.0pt;color:black'>For real-time traffic via Intercluster
Communications (ICCS), which includes signaling, call admission control, and so
forth, as well as CTI Manager realtime traffic, a DSCP value of 26 (AF31 or IP
precedence 3) is used. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Standard AutoQoS Policy<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>class-map match-any AutoQoS-VoIP-Remark<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> match ip dscp ef <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> match ip dscp cs3 <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> match ip dscp af31 <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>class-map match-any AutoQoS-VoIP-Control-UnTrust<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> match access-group name AutoQoS-VoIP-Control<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>class-map match-any AutoQoS-VoIP-RTP-UnTrust<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> match protocol rtp audio <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> match access-group name AutoQoS-VoIP-RTCP<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>policy-map AutoQoS-Policy-UnTrust<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> class AutoQoS-VoIP-RTP-UnTrust<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> priority percent 70<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> set dscp ef<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> class AutoQoS-VoIP-Control-UnTrust<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> bandwidth percent 5<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> set dscp af31<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> class AutoQoS-VoIP-Remark<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> set dscp default<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> class class-default<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> fair-queue<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>interface Serial0/0/0<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> description SerialT1 <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> auto qos voip <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> service-policy output AutoQoS-Policy-UnTrust<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>ip access-list extended AutoQoS-VoIP-Control<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> permit tcp any any eq 1720<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> permit tcp any any range 11000 11999<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> permit udp any any eq 2427<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> permit tcp any any eq 2428<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> permit tcp any any range 2000 2002<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> permit udp any any eq 1719<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> permit udp any any eq 5060<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>ip access-list extended AutoQoS-VoIP-RTCP<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> permit udp any any range 16384 32767</span></font><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span><o:p></o:p></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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