Oracle Acme Packet 4500, Hardware Installation And Maintenance Manual

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72 Acme Packet 4500 Hardware Installation and Maintenance Guide
MAINTENANCE
from the system. It is imperative that you wait at least 10 seconds between power
down and power up to ensure that all components are completely powered down
before restart.
Power cycling the Acme Packet 4500 without performing a halt operation can lead
to data loss to the Storage Device when running S-CZ software images. To ensure
stable operation a file system check will be performed on the next power up. This
check may take several minutes to complete, and should not be interrupted.
Standby Mode for HA Nodes
When performing hardware maintenance on the Acme Packet 4500, it is best to
minimize any risk of interrupting network traffic or losing data. If the Acme Packet
4500s are configured as an HA node, you should only work on the Acme Packet 4500
that is in standby mode.
There are two ways to determine the HA state of each Acme Packet 4500 in an HA
pair.
1. If you are in the same physical location as the Acme Packet 4500s, you can view
the graphic display on the front panel. The display will indicate HA state as
explained in the Graphic Display Output for HA Nodes section of the
Graphic
Display chapter of this guide. There is no (S) designation for an active system,
but there is for a standby system.
2. If you are not in the same physical location as the Acme Packet 4500s, you can
use the ACLI
show health command. The output of this command indicates the
current HA state of the Acme Packet 4500.
Once you have determined that the Acme Packet 4500 due for maintenance is in
standby mode, you can continue with the appropriate procedures to replace a part.
If you need to perform maintenance on the active Acme Packet 4500, you need to
manually force the two Acme Packet 4500s to switch HA states. Forcing a switchover
renders the currently active Acme Packet 4500 standby, and the currently standby
Acme Packet 4500 will assume all traffic processing and forwarding as the active
system.
Caution This procedure is only applicable to Acme Packet 4500s in an
HA deployment.