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<DIV>Regarding Peer Firmware Sharing I am wary of this bug - CSCtg96408 <SPAN>Third-gen phone (7911/41, etc) fails to boot after PFS upgrade. </SPAN></DIV>
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<DIV><SPAN>Looks like it was recently fixed on the latest versions of SCCP 9.1.1</SPAN></DIV>
<DIV><SPAN></SPAN> </DIV>
<DIV><SPAN>Steve</SPAN></DIV>
<DIV><BR><BR>>>> Wes Sisk <wsisk@cisco.com> 11/18/2010 5:02 PM >>><BR>Engineer's favorite answer: it depends.<BR><BR>* TFTP is especially inefficient over WAN. See:<BR><A href="http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/netstruc.html#wpmkr1185039">http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/netstruc.html#wpmkr1185039</A><BR><BR>* This is all exacerbated in very old phone loads with hard coded <BR>timeouts. Examples:<BR>7937 stops downloading load via TFTP after one hour , Fixed CSCso55333<BR>load update process to kill CVM before loading, rm 10 min TFTP timeout , <BR>Fixed CSCsb10954<BR><BR>* This is further exacerbated by increased load size in 'newer phones' <BR>such as 7970,79x1, 79x2, 79x5<BR><BR>* Fourth gen phones (89xx,99xx) get a bit of reprieve because (1) they <BR>download in the background while the phone is up and registered and (2) <BR>they get (are getting?) firmware download via HTTP.<BR><BR>* Oddly enough I often see this exacerbated by speed/duplex mismatch at <BR>the switch port of the TFTP server. Is the network healthy otherwise? No <BR>packet loss, asymmetric routing, etc.<BR><BR>Recommended actions:<BR>1. Identify the model and load of phone in use. If it fits into the <BR>'working but slow due to nature of TFTP' then contact your Cisco account <BR>team and press to have HTTP firmware download ported into those phone <BR>models.<BR>2. In the mean time use either 'load server' or 'peer firmware sharing' <BR>for remote site phones:<BR>Load server: <BR><A href="http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7961g_7961g">http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7961g_7961g</A>-ge_7941g_7941g-ge/firmware/7_0_2/english/release/notes/6141702.html#wp1029737<BR>Peer firmware sharing:<BR><A href="http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7961g_7961g">http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7961g_7961g</A>-ge_7941g_7941g-ge/firmware/8_3_1/english/release/notes/61831.html#wp116015<BR><BR>/Wes<BR><BR><BR>Mike King wrote:<BR>> We have a remote SRST site that we're bringing up. We normally do a<BR>> P2P link with a ping RTT of 3ms, but this site got rushed, and the P2P<BR>> link is still on 120 to 180 day order.<BR>><BR>> We bring the site up using Comcast Cable modem service(50down 20 up).<BR>> RTT is around 30 ms.<BR>><BR>> We use ASA to ASA IPSEC L2L tunnels<BR>><BR>> When the phones register, the TFTP traffic for the firmware upgrade is<BR>> dog slow. To the point where the phones eventually stop downloading<BR>> it. (We packed all the phones up, and dragged them somewhere else to<BR>> upgrade the firmware, that's not the issue)<BR>><BR>> I fire a TFTP client up on my laptop, and a TFTP server at the same<BR>> site as the callmanager, and transfer a 90MB file. It takes around 2<BR>> hours. If I use windows file sharing, it takes about 4 minutes.<BR>><BR>> I have a TAC case open with ASA Security / VPN. I'm getting chatter<BR>> that "tftp is a lock-step protocol that requires an ack to be sent and<BR>> received for every data packet sent, before the next packet is sent"<BR>> and with the RTT we have that is the maximum speed we should expect.<BR>><BR>> So for the next time I have to upgrade the firmware on the phones at<BR>> that site, what are your suggestions?<BR>><BR>> The way I'm seeing it:<BR>> 1. Something is Broke, and TFTP shouldn't take that long.<BR>> 2. Yes, that's normal, you will have to do something different, like<BR>> use a TFTP load server.<BR>><BR>> So which is it? Any opinion is welcome.<BR>> _______________________________________________<BR>> cisco-voip mailing list<BR>> cisco-voip@puck.nether.net<BR>> <A href="https://puck.nether.net/mailman/listinfo/cisco">https://puck.nether.net/mailman/listinfo/cisco</A>-voip<BR>> <BR>_______________________________________________<BR>cisco-voip mailing list<BR>cisco-voip@puck.nether.net<BR><A href="https://puck.nether.net/mailman/listinfo/cisco">https://puck.nether.net/mailman/listinfo/cisco</A>-voip<BR><BR></DIV><font face="monospace">************************************<br>
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