HP A6604 Installation Manual page 22

The media dependent interface (MDI) standard is typically used on the Ethernet interface of
network adapters. The media dependent interface crossover (MDI-X) standard is typically used
on hubs or LAN switches.
RESET button
To reset the current RPE-X1, you can press the RESET button.
If you press the RESET button when only one RPE-X1 is equipped, the whole system will be

reset.
If you want to perform an active-standby switchover when two RPE-X1s are equipped, press

the RESET button on the active RPE-X1. The system will automatically switch the services to
the standby RPE-X1, without interrupting the ongoing services.
If you press the RESET button on the standby RPE-X1 when two RPE-X1s are equipped, the

standby RPE-X1 will be reset but the system operation will not be affected.
The RUN LED goes off when the RPE-X1 is reset, flashes fast (at 8 Hz) when BootWare is
running, and flashes slowly (at 1 Hz) after the system is booted and operates normally.
If you perform no save operation before resetting the router, the current system configuration

will not be saved after the router is reset.
Never press the RESET button when the RUN LED is blinking fast or when the router is

accessing the CF card or a USB storage device. Otherwise, the file system of the router may be
damaged.
Clock
The device is designed with an internal clock module that provides the system time. You can set
the system time through a command line interface.
Use the clock datetime time date command in user view to set the system date and time. For
the description of the clock datetime command, refer to Basic System Configuration in the
System Volume of HP SR6600 Routers User Manual.
When a power failure occurs to the router, the clock module can continue working to ensure the
system time is correct next time the router boots. With the router powered off, the clock module
can work for at least 10 years.
When the router is powered on, note the following points:
Never replace the clock module battery.

The system time gets lost once the clock module battery is removed, and you need to set the

system time again through the command line interface. However, the system time will still get
lost after the router is powered off.
Switchover between the active and standby RPE-X1s
The device can be equipped with two RPE-X1s. One is the active RPE-X1 and operates in the
master mode, and the other is the standby RPE-X1 and operates in the slave mode. By default,
the RPE-X1 in Slot 0 operates in the master mode. The configuration of the standby RPE-X1 is
synchronized with that of the active RPE-X1. Thus, in the event that the active RPE-X1 fails, the
standby RPE-X1 immediately becomes the active RPE-X1 to ensure that the device works
properly and its configuration is synchronized with that of the original active RPE-X1. This
process is known as active-standby switchover.
An active-standby switchover occurs when:
The active RPE-X1 fails.

The active RPE-X1 is removed.

A remote switchover is performed through SNMP.

A manual switchover is performed.

The active-standby switchover process is as follows:
1) The standby RPE-X1 automatically connects and controls the system bus while the original
active RPE-X1 disconnects the system bus.