3Com 7700 Configuration Manual page 318

38 C 11: S M
HAPTER YSTEM ANAGEMENT
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
opposite end.
Perform the following configurations in system view.
Table 66 Configure NTP Peer Mode
Operation
Configure NTP peer mode
Cancel NTP peer 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
peer will be taken; priority indicates that the peer will be the first choice for time
server.
Configuring NTP Broadcast Server Mode
local switch to transmit NTP broadcast packets. In this case, the local equipment
operates in broadcast mode and serves as a broadcast server to broadcast
messages to its clients regularly.
Perform the following configurations in VLAN interface view.
Table 67 Configure NTP Broadcast Server Mode
Operation
Configure NTP broadcast server mode
Cancel NTP broadcast 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. This command can
only be configured on the interface where the NTP broadcast packets will be
transmitted.
Configuring NTP Broadcast Client Mode
local switch to receive NTP broadcast messages and operates in broadcast client
mode. The local switch listens to the broadcast from the server. When it receives
the first broadcast packets, it starts a brief client/server mode to switch messages
with a remote server for estimating the network delay. Thereafter, the local switch
enters broadcast client mode and continues listening to the broadcast and
synchronizes the local clock according to the arrived broadcast message.
Command
ntp-service unicast-peer ip-address [
version number ] [ authentication-key keyid
] [ source-interface { interface-name |
interface-type interface-number } ] [ priority ]
undo ntp-service unicast-peer ip-address
Designate an interface on the
Command
ntp-service broadcast-server [
authentication-keyid keyid version number
]
undo ntp-service broadcast-server
Designate an interface on the