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Ed,<br>
<br>
we have seen a strong correlation between CFA failures and CM servers
separated by some distance of network rather than CM's being connected
to immediately adjacent switches.<br>
<br>
there are 3 primary steps to setting CFA:<br>
1. phone tells primary CM it wants to set CFA<br>
2. primary CM tells publisher to set CFA<br>
3. publisher tells all CMs in the cluster CFA has been set.<br>
<br>
if 2 fails you get a database error on the ipphone<br>
if 3 fails you set CFA and receive no error but phone does not fwd.<br>
<br>
#2 is performed through DCOM - DBLHelper does not test this. dtcping
and rpcping from microsoft can test DCOM RPC's but that's about it.
Being RPC based the communication uses multiple random ephemereal ports
and connects are established dynamically.<br>
#3 is performed through a TCP session from aupair.exe on a random port
on the publisher to ccm.exe on port TCP:7727 of some random server in
the cluster. Usually when we see CFA failures we find out the random
server is remote from the rest of the servers in the cluster. Note if
aupair.exe does not detect any change notifications pending it may not
establish this session to port 7727. I have seen this problem only once
when someone used a 3rd party (not MS or Cisco) database management app
on the SQL instance running on the CM publisher and it removed all
triggers from the CCM database.<br>
<br>
/Wes<br>
<br>
Ed Leatherman wrote:
<blockquote
cite="mid94a1afde0604061134g7ad39093ye4ae61ee508f5f16@mail.gmail.com"
type="cite">Anyone having problems with CFWDAll not working every now
and then? I've been having trouble with it ever since we upgraded to
4.0.. albeit they are getting less frequent as I apply various SR's. We
just had a burp this morning with it and I had to reload DBL Mon this
morning to fix it.. was relatively painless but kinda annoying to still
be having these problems. So wondering if anyone else is having it
happen. We're running 4.1(3)SR3a now.<br clear="all">
<br>
-- <br>
Ed Leatherman<br>
IP Telephony Coordinator<br>
West Virginia University<br>
Telecommunications and Network Operations
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