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<DIV dir=ltr><FONT face=Arial color=#000000 size=2>Thanks for you quick answer!!</FONT></DIV>
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<DIV dir=ltr><FONT face=Arial size=2>Do you know if when phones roll back from a SRST situation they require more Signallig bandwidth?</FONT></DIV>
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<DIV dir=ltr><FONT face=Arial size=2>Regards!</FONT></DIV>
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<DIV dir=ltr><FONT face=Arial size=2>Jordi!</FONT></DIV></DIV>
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<FONT face=Tahoma size=2><B>De:</B> Jorge L. Rodriguez Aguila [mailto:jorge.rodriguez@netxar.com]<BR><B>Enviado el:</B> jue 15/05/2008 17:05<BR><B>Para:</B> Jordi Riba (Europe); cisco-voip@puck.nether.net<BR><B>Asunto:</B> RE: Tftp bandwidth Requirements question<BR></FONT><BR></DIV>
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<P class=MsoNormal><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">The highest moment of TFTP usage are usually during Firmware updates. Regular TFTP stuff like Downloading the Phone Config or a Change of ring tone is not bandwidth consuming truly per phone. It is just when you aggregate the X amount of phones that you see a lot of bandwidth consumption in terms related to the TFTP server. So You might see Phones Pulling 2-4 Meg Firmware files and then they just pull rather small files in comparison. Since You should do Firmware upgrades and maintenance out of business hours they should not be that bad in terms of bandwidth consumption on your WAN. Also remember that the bandwidth statement refers to minimum bw allocation during congestion so even if you have a bandwidth 62 statement in the policy if there is more bw, it will use it.</SPAN></P>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Jorge Rodríguez Aguila</SPAN></P>
<P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">CCNA,CCVP,CRMCS,CIPCES</SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Senior Voice/Data Network Consultant</SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Netxar Technologies</SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">jorge.rodriguez@netxar.com</SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Office 787-765-0058</SPAN></P>
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<P class=MsoNormal><B><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'"> cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] <B>On Behalf Of </B>Jordi Riba (Europe)<BR><B>Sent:</B> Thursday, May 15, 2008 10:29 AM<BR><B>To:</B> cisco-voip@puck.nether.net<BR><B>Subject:</B> [cisco-voip] Tftp bandwidth Requirements question</SPAN></P></DIV></DIV>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Arial','sans-serif'">Hi, </SPAN></P></DIV>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">I've been reading about bandwidth requirements for a Multisite WAN with Centralized Call Processing IPT deployment model and I have not found information about TFTP bandwidth requirements. </SPAN></P></DIV>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">I know that tftp packets are marked by CCM with DSCP 26 as all other signalling packets. Then what I don't understand is if I configure for a 120 IP phones branch office deployment a Signalling CoS (between headquarters and branch office) of around 62Kbps... It will take a very long time to register all phones if they need to download their firmware from CCM, isn't it?</SPAN></P></DIV>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Do you know how big is the total amount of data that a phone downloads from CCM the first time it start? where can I check it?</SPAN></P></DIV>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Do you know how big is the total amout of data a phone need to download from CCM when it registers again to CCM after an SRST situation?</SPAN></P></DIV>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">All help will be very appreciated.</SPAN></P></DIV>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Thanks!</SPAN></P></DIV>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Jordi!</SPAN></P></DIV>
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