<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
It depends on the phone model and the specific phone load. The newer phones (79x1 and later and 7970) have phone loads that have grown to several Mb, and will probably only get bigger. The peer firmware sharing feature was introduced with the 8.3 loads to help phones in remote sites upgrade phone loads faster. <div><br></div><div>Most of the time it's delay rather than bandwidth that causes issues with TFTP. Since each data packet has to be Ack'd at the application layer by the phone before the next one can be sent a high latency between phone and server can cause very large upgrade times.</div><div><br></div><div>If you need to check on exactly how much data a phone gets from the TFTP server for the config file, phone load, etc I'd encourage you to get a phone and a packet sniffer and go to town. You can get the zip file for a given phone load from cisco.com to see how big the files are that the phone will be downloading.</div><div><br></div><div>HTH,</div><div><br><div> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">-Ryan</font></p> </div><br><div><div>On May 15, 2008, at 10:29 AM, Jordi Riba (Europe) wrote:</div><br class="Apple-interchange-newline"> <div><font face="Arial" color="#000000" size="2">Hi, </font></div> <div><font face="Arial" size="2"></font> </div> <div><font face="Arial" size="2">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. </font></div> <div><font face="Arial" size="2"></font> </div> <div><font face="Arial" size="2">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?</font></div> <div><font face="Arial" size="2"></font> </div> <div><font face="Arial" size="2">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?</font></div> <div><font face="Arial" size="2"></font> </div> <div><font face="Arial" size="2">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?</font></div> <div><font face="Arial" size="2"></font> </div> <div><font face="Arial" size="2">All help will be very appreciated.</font></div> <div><font face="Arial" size="2"></font> </div> <div><font face="Arial" size="2">Thanks!</font></div> <div><font face="Arial" size="2"></font> </div> <div><font face="Arial" size="2">Jordi!</font></div> <div><font face="Arial" size="2"></font> </div> <div> </div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">cisco-voip mailing list</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</a></div> </div><br></div></body></html>