I have to replace 2 MCS-7825 by 2 MCS-7835.
The 2 clusters have the same version : 5.1.2b.
I do not make a backup/restore of the data because the old installation is bad.
So my MCS-7835s are a fresh install of UCM 5.1.2b, and I had all the phones/UDP... with BAT.
In 2 days I will replace the old CMs IP address by the new CMs IP address in the TFTP option of the phones DHCP pool.
Today, I made a test by setting an alternate TFTP address on 2 phones, and they do not register on the new CM :
-They download their firmware from the new Pub;
-They stuck in "Configuration IP/Configuration CM List".
Does someone know what kind of issue I meet ?