3Com Switch 7700 Configuration Manual page 367

local switch will operate in broadcast mode. If you configure an interface on the
local switch to receive NTP broadcast packets, the local switch will operate in
broadcast client mode. If you configure an interface on the local switch to transmit
NTP multicast packets, the local switch will operate in multicast mode. You may
also configure an interface on the local switch to receive NTP multicast packets,
the local switch will operate in multicast client mode.
The following sections describe how to configure NTP modes:
Configuring NTP Server Mode
■
Configuring NTP Peer Mode
■
Configuring NTP Broadcast Server Mode
■
Configuring NTP Broadcast Client Mode
■
Configuring NTP Multicast Server Mode
■
Configuring NTP Multicast Client Mode
■
Configuring NTP Server Mode
ip-address as the local time server. ip-address specifies a host address other than a
broadcast, multicast, or reference clock IP address. In this case, the local switch
operates in client mode. In this mode, only the local client synchronizes its clock
with the clock of the remote server, while the reverse synchronization will not
happen.
Perform the following configurations in system view.
Table 65 Configuring NTP Time Server
Operation
Configure NTP time server
Cancel NTP server mode
NTP version number number ranges from 1 to 3 and defaults to 3; the
authentication key ID keyid ranges from 0 to 4294967295; interface-name or
interface-type interface-number specifies the IP address of an interface, from
which the source IP address of the NTP packets sent from the local switch to the
time server will be taken; priority indicates the time server will be the first choice.
Configuring NTP Peer Mode
ip-address as the peer of the local equipment. In this case, the local equipment
operates in symmetric active mode. ip-address specifies a host address other than
a broadcast, multicast, or reference clock IP address. In this mode, both the local
switch and the remote server can synchronize their clocks with the clock of the
opposite end.
Set a remote server whose IP address is
Command
ntp-service unicast-server ip-address [
version number | authentication-keyid
keyid | source-interface { interface-name |
interface-type interface-number } | priority ]*
undo ntp-service unicast-server ip-address
Set a remote server whose IP address is
NTP 359