Hitachi GR2000 Series - Manual (Page 84)

Hitachi Gigabit Router GR2000 Series Enhanced Version Operations - Device Management Overview
4-6 GR2K-GA-0015
Ver. 07-02
4.3 Setting the time
4.3.1 Overview
Time is the information assigned to the creation time of log information or files in the
outer. Set precise time to the outer when operation starts. The time is set using a set
calendar command.
The commands or functions shown in the table below are provided for settings
related to time information.
4.3.2 Precautions when changing time
A change of time has an effect on the time required until the user who operates
commands upon a UNIX shell prompt logs out automatically (the user who
operates commands upon a CLI prompt is not affected by a change of time). The
user who operates commands upon a UNIX shell prompt automatically logs out
when time is advanced against the automatic logout time set using a set
exec-timeout command.
The CPU usage rate of RM and RP in the statistical information collected using
the outer and the buffer usage rate of RP are cleared to "0" when time is changed.
The adjacent relationship of OSPF may be disconnected if time is continuously
changed for ten seconds or more when OSPF or OSPFv3 is used. The
disconnection conditions are when the change in time is carried out within
HelloInterval time (default: ten seconds) RouterDeadInterval time/10 times or
more (default: 40/10 = four times or more).
In the outer, the adjacent relationship of DVMRP may be disconnected if time is
continuously changed for ten seconds or more using a time change command
and function when IP multicast communication is performed using DVMRP. In
this case, a multicast packet relay may stop temporarily. They occur when there
is a continuous correction of more than ten seconds for ten seconds two times or
more.
An MPLS function stops if time is returned when MPLS is used. Copy
running-config command and configuration definition change command do not
operate correctly, so do not return the time. In this case, restart an MPLS
program using a restart mpls command.
[ROUTE-OS7]
Table 4-2 Settings related to time information
Item No. Command/function Contents of setting Reference
1 -timezone parameter of
config router command Sets the time zone of the router. Configuration Commands,
Vol. 1- router
2 NTP function Synchronizes time information
with the NTP server using an NTP
protocol. Configuration Commands,
Vol. 2 - ntp (NTP information)
3 Rdate command Acquires date and time
information from the remote router
and sets. Operations Commands, Vol.
1 - rdate