They are also meant to re-establish connection of devices with call control.
Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager
Following which, a TCP 3 way handshake will happen on port to establish a communication channel. Primary server then responds to the SCCP keep-alive. The time interval is 30 seconds to primary server and 60 seconds to the backup server. This method uses an algorithm to calculate the average of the time taken by the CUCM to acknowledge the previous keep-alives.
In this mechanism, the phone waits for the 3 keep-alive intervals to detect the failure of the primary CUCM. Networks where transit time of packets fluctuate, delayed failover helps avoid unnecessary unregistration. Therefore, the phone sends keep-alive every seconds actually seconds which is minus the delta value configured in SIP profile, which is 5 seconds by default. In this case, the phone sends keep-alive every seconds.
Troubleshoot AnyConnect VPN Phone - IP Phones, ASA, and CUCM
Collecting packet captures from CUCM. Collecting capture from IP Phone. When Captures from both end are collected, to verify that the keepalive sent by phone is actually reaching the CUCM or not. Event Viewer Application log indicates that the phones kept restarting due to missing keep alives with error code of Clearly, the first response was not from CUCM.
When the phone sends the initial register it sets the expires timer to seconds default set in SIP profile applied on the phone. CUCM acknowledges it by modifying the timer to seconds as per the value set in Service parameter. The phone sends Keepalive every seconds keep-alive interval is seconds which is minus the delta value configured in SIP profile, which is 5 seconds by default.
In this case the phone sends keepalive every seconds. In this problem scenario the phone sends the first keepalive at second and it gets dropped in the network. Now the phone sends the second keepalive at seconds and it gets dropped in the network.All IP phones of a single phone type failed to successfully register. The router verifies the phone's configuration against the router's running configuration.
If the phone firmware is required, the phone downloads the appropriate firmware files from the TFTP server and begins the phone bootup sequence again. When this happens, soft keys can appear on the phone display but the extension, name, or label do not appear on the phone display.
No extension number, name, or label or an incorrect extension number, name, or label appears on the phone display.CUCM IP Phone Registration and Configuration and make a call between two ip phones
For SIP phones: Use the show voice register statistics command to display statistics associated with the registration event. If all IP phones have lost their registration, the network interface is the most likely source of the failure.
If you have an internal EtherSwitch module, go to the next step. The following is a partial sample output from the show command including the configuration for an internal DHCP server and Ethernet switch network interface. Does the subnet mask in the DHCP configuration match the one in the network interface? Use the show running-config command to display the contents of the running configuration file on this Cisco Unified CME router. Is a phone type specified in the auto-assign configuration?
Is the phone type in the command correctly identified? Is the appropriate phone firmware filename, including version and protocol, specified for this phone type? Note The firmware filename must not include the. Use the show flash command to display a list of files in flash memory. The phone should upgrade its firmware to the new firmware mentioned in the configuration. Does the "File not Found" or "Error verifying configuration" error message appear on the IP phone display? Use the reset command to reboot this IP phone.
Ping the external TFTP server. The MAC address is located on a label on the rear of the phone. For SCCP phones: Use the show telephony-service tftp-bindings command to display a list of files that were generated during configuration.
The following is a partial sample output from the show command. For SIP phones: Use the s how voice register tftp-bind command to display a list of files that were generated during configuration. Does the file list include a configuration file for the MAC address of this phone? Use the appropriate command to generate configuration files for this phone, then use the reset command to reboot this phone. The following is sample output from this command displaying information in three different configuration files; SIPB7FE.
The following partial sample output shows registration information for the three IP phones. For SIP phones: Use the show voice register all command to display information about SIP phones and locate the configuration information for this phone. The following is a partial sample output showing voice register dn and voice register pool information for a phone with the MAC address A.Note: The same resolution applies to Option However, it is usually a best practice to use Option For more background information about resolving Skinny Client registrations issues, refer to these documents:.
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Showing results for. Search instead for. Did you mean:. Labels: IP Phone and Accessories. Check if it is blank or incorrect. Latest Contents. Created by Chet Cronin on PM. Was operational for a few days on Ce9. System has been downgraded to Ce9. Problem is no power to Monitor 1, Monitor 2, CUIC timezone. Created by YangShi on PM. So how can I modify it? To change t Created by fabrizio. As we won't buy new meeting room devices to join in, which one is the way to use our existing WebEx hardware devices to join in?
Created by davisjaron on PM. Hello all,I've been digging through documentation but haven't so far found my answer, so I'm hoping someone can help me out. I ask this because I'm constantly seeing upw Cisco Business to Business Outgoing call not working.
Created by mohsin majeed on PM. Create Please login to create content. Related Content. Follow our Social Media Channels.This document discusses and solves the most common problems that cause Cisco IP phones to fail to register with the Cisco CallManager.
Troubleshooting Cisco IP Phone Registration Problems with Cisco CallManager 3.x and 4.x
Once you implement these troubleshooting steps, your IP phone must be fully functional and must communicate normally with the Cisco CallManager. This document assumes that the majority of phones in the network work properly. In other words, it is assumed that one phone or a small number of phones do not register properly.
The remainder of the phones function properly. If you have a problem that affects most of or all your phones, this document probably does not help in the resolution. Refer to Cisco Technical Tips Conventions for more information on document conventions.
When IP phones do not need to load a newer or different image, all IP phones follow these normal bootup and registration steps:. Obtain other configuration parameters and files such as speed dial numbers and ring filesand finish registration with the Cisco CallManager server. This is true of phones that register with a Cisco CallManager server with a newer version of CallManager than the version with which the phones previously registered. In addition, the server administrator could have changed the default image for a type of phone, or for a specific phone.
Any time a phone needs to load a new image, the phone must reboot and reregister with the new image. The device pools to which you have assigned the phones determine the server with which the phones register. A phone can obtain the configuration file from a different server than the server with which the phone registers.
If an IP phone cannot perform the bootup process correctly, the phone is not able to register with the Cisco CallManager server. When you plug in an IP phone, the phone will attempt to boot and configure itself. The LCD screen provides an indication of the current phase of the bootup process as the bootup progresses. The phone cannot successfully complete the bootup process until the phone connects to the Ethernet network and registers with a Cisco CallManager server.
Registration with a Cisco CallManager server is successful only when the server adds the phone or when the server has Auto-Registration enabled. The default for Auto-Registration is disabled. A phone normally cycles through the bootup sequence when either of these two Cisco CallManager conditions have not been met. The phone also could be faulty if the message the phone displays never changes after you plug in the phone. Contact Cisco Technical Support to request a replacement if your phone is under warranty.
This is the Configuring IP section of the registration process. If you have a G, be sure to set the switch port that connects to the phone to 10 MB or Auto. For information on how to reset your phone configuration to the original factory defaults, refer to either of these documents:.Which is connected to a using as a L2.
The phones pull full configuration but stops an shows"Opening I was going by the lab manual config. Yeah, I think there are some extra steps to make it work - but I believe those pages should point you in the right direction. I can finally go home early lol. I was able to go through manual and auto registration process.
We Are Ringing!!!!!!! Im not happy with the lab manual, I have been stuck for a week lol!!! The chapter you advised was 9. I stopped at 8 and was reviewing all the previous material lol!!!!
Troubleshooting Phone Registration in Cisco Unified CME
Phones are ringing Phil. After a couple of static routes and additional config of the cucm server got me back in business. Back on schedule for this Voice Exam. To continue this discussion, please ask a new question. Get answers from your peers along with millions of IT pros who visit Spiceworks. Which is connected to a using as a L2 The phones pull full configuration but stops an shows"Opening I was able to get CME up and Running. I Will attach my config. Best Answer. Mitch Oct 14, at UTC.I know that there have been a lot of posts like this on the internet but I can not seem to find a solution to my problem.
My two phones will download their files from the tftp server running on my laptop and then just sit at the registering screen. I also see a phone with an x next to it next to the line button. Really need to see the config file to even guess what could be the problem. Try pastebin. Here is a pastebin of my spemac.
To make things simple I have changed the extension number and password to that is not an error.
When I log into my freepbx via putty and run asterisk -rvvvv all I get back is information about warenty and a line that says Connected to Asterisk I have looked at the link you provided as well but it seems that my phone is looking for files not found in there : term41default and other files that are SEPMAC. I have these files from cisco but that are not specified by the link. When you ran asterisk -rvvvv, did you try rebooting the phone while still connected to Asterisk?
What virtualization system are you using? Networking set up as bridged? The phone shows an incorrect time. I did not change the time settings in the config file. The PC and laptop are separate computers. If you see lots of traffic from other activity on the PC, filter it out by typing ip.
Posting the request and reply would be useful. If there is still no traffic displayed, ping the phone from the PBX to confirm that the capture setup is working properly.
When I enter ip. I have attached the ping from the PBX to the phone ping. I am reasonably sure that some firewall is intercepting the NTP request. At a root shell prompt in the guest, type: iptables -L You should see an empty rule set which looks something like:.On the ASA, use the show version command in order to check if the feature is enabled.
The license name differs with the ASA release:. Note : Once you upgrade to the U. Note : You can use the Cisco CLI Analyzer registered customers only in order to view an analysis of show command outputs.
You should also refer to the Important Information on Debug Commands Cisco document before you use debug commands. Only one identity certificate can be used because only one certificate can be assigned to each interface. For third-party SSL certificates, install the complete chain in the ASA, and include any intermediate and root certificates. Check the trustpoint assigned to the interface to which the IP phones connect in order to know which certificate to export from the ASA.
Use the show run ssl command in order to verify the trustpoint certificate to be exported. When this issue occurs, newer model phones are unable to connect, while the older model phones do not experience any issues.
Here are the logs on the phone when this issue occurs:. In Versions 9. In order to prevent the ASA from presenting a self-signed SSL certificate, the administrator must remove the cipher suites that correspond via the ssl cipher command.
For example, for an interface that is configured with an RSA trustpoint, the administrator can execute this command so that only RSA-based ciphers are negotiated:. Explicitly-configured certificates are always used. Self-signed certificates are only used in the absence of a configured certificate.
You can use an external database in order to authenticate IP phone users. Different circumstances might cause the hash for this certificate presented by the ASA to not match the hash that the CUCM server generates and pushes to the VPN phone through the configuration file. If the connection continues to fail, check if the hash of the ASA certificate matches the hash the IP phone is expecting:.
The ASA presents the certificate applied with the ssl trustpoint command on the interface to which the IP phone connects. To check this certificate, open the browser in this example, Firefoxand enter the URL group-url to which the phones should be connecting:. Two download methods are:. Confirm that both hash values match. The browser presents the hash in hexadecimal format, while the XML file uses base 64, so convert one format to the other in order to confirm the match.
Note : If the previous hash value does not match, the VPN phone does not trust the connection that is negotiated with the ASA, and the connection fails. VPN phones do not perform real certificate validation but instead use hashes pushed down by the CUCM to validate the servers. Because VPN load-balancing is basically an HTTP redirection, it requires the phones to validate multiple certificates, which leads to failure.