Ntp-Service Multicast-Client; Ntp-Service Multicast-Server - 3Com 8807 Command Reference Manual

936 C 55: NTP C
HAPTER ONFIGURATION
ntp-service
multicast-client
ntp-service
multicast-server
C
OMMANDS
By default, a local device allows up to 100 SESSIONS.
Example
# Set the local equipment to allow up to 50 SESSIONS.
<SW8800> system-view
System View: return to User View with Ctrl+Z.
[SW8800] ntp-service max-dynamic-sessions 50
Syntax
ntp-service multicast-client [ ip-address ]
undo ntp-service multicast-client [ ip-address ]
View
VLAN interface view
Parameter
ip-address: Multicast IP address of Class D. By default, the ip-address argument is
set to 224.0.1.1. Actually, for the Switch 8800 Family series, you can set 224.0.1.1
as the multicast IP address only.
Description
Use the ntp-service multicast-client command to configure the NTP multicast
client mode.
Use the undo ntp-service multicast-client command to disable the NTP
multicast client mode.
By default, the multicast client service is disabled. ip-address defaults to 224.0.1.1.
Designate an interface on the local Ethernet Switch to receive NTP multicast
messages and operate in Multicast Client mode. The local Ethernet Switch listens
to the multicast packets from the server. When it receives the first multicast
packet, it starts a brief Client/Server mode to switch messages with a remote
server for estimating the network delay. Thereafter, the local Ethernet Switch
enters Multicast Client mode and continues listening to the multicast packets and
synchronizes the local clock according to the arrived multicast packets.
Example
# Configure to receive NTP multicast packet through Vlan-Interface1 and the
multicast group corresponding to these packets located at 224.0.1.1.
<SW8800> system-view
System View: return to User View with Ctrl+Z.
[SW8800] interface vlan-interface 1
[3Com-Vlan-interface1] ntp-service multicast-client 224.0.1.1
Syntax
ntp-service multicast-server [ ip-address ] [ authentication-keyid keyid ] [ ttl
ttl-number ] [ version number ]*
undo ntp-service multicast-server [ ip-address ]