[cisco-voip] ASA Phone-Proxy, CUCM 7.1(5b)SU4, and 7921/7925

[c3voip]

It is just stops seeing ACK's come back.

 

Socket[35] Async IO started
successfully|<CLID::CCM1-Cluster><NID::TFTP><LVL::Significant><MASK::0004>

No ACK, Socket[35] Serving File[TNUXH-1.4.1SR1.SBN] Expecting block[359]
Retrying [1] times...|<CLID::
CCM1-Cluster><NID::TFTP><LVL::Detailed><MASK::0004>

No ACK, Socket[35] Serving File[TNUXH-1.4.1SR1.SBN] Expecting block[359]
Retrying [2] times...|<CLID::
CCM1-Cluster><NID::TFTP><LVL::Detailed><MASK::0004>

No ACK, Socket[35] Serving File[TNUXH-1.4.1SR1.SBN] Expecting block[359]
Retrying [3] times...|<CLID::
CCM1-Cluster><NID::TFTP><LVL::Detailed><MASK::0004>

No ACK, Socket[35] Serving File[TNUXH-1.4.1SR1.SBN] Expecting block[359]
Retrying [4] times...|<CLID::
CCM1-Cluster><NID::TFTP><LVL::Detailed><MASK::0004>

No ACK, Socket[35] Serving File[TNUXH-1.4.1SR1.SBN] Expecting block[359]
Retrying [5] times...|<CLID::
CCM1-Cluster><NID::TFTP><LVL::Detailed><MASK::0004>

No ACK, Socket[35] Serving File[TNUXH-1.4.1SR1.SBN] Expecting block[359]
Retrying [6] times...|<CLID::
CCM1-Cluster><NID::TFTP><LVL::Detailed><MASK::0004>

No ACK, Closing Socket[35] Serving File[TNUXH-1.4.1SR1.SBN]
After[6]retries...|<CLID::
CCM1-Cluster><NID::TFTP><LVL::Detailed><MASK::0004>

 

It is almost like it is the phone that stops communicating, but I have tried
all of the versions of firmware for these wifi phones and they are all the
same.

 

-C

 

From: Wes Sisk [mailto:wsisk at cisco.com] 
Sent: Tuesday, March 27, 2012 1:13 PM
To: c3voip
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] ASA Phone-Proxy, CUCM 7.1(5b)SU4, and 7921/7925

 

sounds like a timing issue.  historically when turning on debugs works
around a problem the underlying reason is that debugs slow down processing
sufficiently to mask the race condition.

 

one tidbit does come to mind here - tftp retransmits.  The tftp server on
cucm has very limited retransmits, like maybe one.

 

when TFTP fails what do debugs, packet captures, or ccm TFTP server traces
show?

 

/wes

 

On Mar 26, 2012, at 2:36 PM, c3voip wrote:





I have upgraded from CUCM 7.1(2a) to CUCM 7.1(5b)SU4 without any issues, but
now I am having issues loading firmware to my 7921 and 7925 wifi phones
through my ASA5520 with the Phone Proxy feature. 

 

Here comes the curveball, if I turn on phone-proxy tftp debugs on the ASA
everything works normally, but nothing has changed on the ASA so why should
this allow tftp to work?

 

I have taken packet captures from both sides of the ASA, without the debug
turned on, and the wifi phone just looks like it stops ACK'ing the tftp
packets.

 

 

Does anyone else have a setup similar to mine or has anyone experienced
anything like this?

 

Thanks,

-C

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