All of our IP Phones are DHCP enabled. Today we setup the DHCP server in our environment and moved the DHCP scope i.e range of IP addresses from old server onto the new one. All IP phones automatically got registered to this new DHCP server. My question is if these IP Phones were properly up and working fine, they already had got the IP addresses then how all IP Phones got rebooted and got registered to new server?
If an IP phone could not renew its lease at half lease time, it would keep on trying periodically until the lease's end. At that point, it surrenders its IP address, and is not usable as a phone until the DCHP server comes back.
But, while the lease has not yet expired, if the phone is powered off and on again, it will boot up without being able to get a DHCP server's acknowledgment to the phone's DHCP request. The phone would then assume the last known good DHCP scope, and not start the lease timer until a DHCP server was heard from. In other words, it would come back up and stay up forever if no DHCP server were to appear.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...