| Use Dynamic Host Configuration Protocol (DHCP) option
150 to point the phones to the
new destination cluster TFTP server.
or power cycle, the phones will download the new destination cluster ITL file
and attempt to authenticate the new Initial Trust List (ITL) file signature with the certificates in
the existing ITL file.
certificate in the existing ITL file can be used to authenticate the signature,
so the phone requests the signer's certificate from the old Trust Verification Service (TVS) server on the
sends this request to the source cluster TVS service on TCP port 2445.
certificate exchange in Steps 1 through 9 provides the TVS service in the
source cluster with the TFTP certificate on the destination cluster that signed
the new ITL file.
returns the certificate to the phone, which allows the phone to authenticate
the signature and replace the old ITL file with the newly downloaded ITL file.
can now download and authenticate the signed configuration files from the new