Chapter 3
Managing Cisco SIP IP Phones
Setting the Date, Time, and Daylight Savings Time
3-24
Cisco SIP IP Phone 7960 Administrator Guide
78-10497-02
Table 3-3 lists the actions that take place when a valid IP address is specified
in the sntp_server parameter.
Table 3-3
Actions Based on sntp_mode When the sntp_server Parameter is Set to an IP Address
sntp_server
= 0.0.0.0
sntp_mode=
unicast
sntp_mode=
multicast
sntp_mode=
anycast
sntp_mode=
directedbroadcast
Sends
SNTP request to the
SNTP server.
Nothing.
When in multicast
mode, SNTP
requests are not sent.
SNTP request to the
SNTP server.
SNTP packet to the
SNTP server.
After the first SNTP
response is received,
the phone switches
to multicast mode.
Receives
SNTP response from
the SNTP server and
ignores responses
from other SNTP
servers.
SNTP data via the
SNTP/NTP
multicast address
from the local
network broadcast
address.
SNTP response from
the SNTP server and
ignores responses
from other SNTP
servers.
SNTP data from the
SNTP/NTP
multicast address
and the local
network broadcast
address and ignores
responses from other
SNTP servers.
