Standby Mode For Ha Nodes - Oracle Acme Packet 4500 Hardware Installation Manual

MAINTENANCE

Standby Mode for HA Nodes

Caution
72 Acme Packet 4500 Hardware Installation Guide
Note: Power cycling the Net-Net 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 filesystem check will
be performed on the next power up. This check may take several
minutes to complete, and should not be interrupted.
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"
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.
This procedure is only applicable to Acme Packet 4500s in an
HA deployment.
section of the Graphic
Version 1.0