Cisco Cisco IPS 4520 Sensor 릴리즈 노트
7
Release Notes for Cisco Intrusion Prevention System 7.1(6)E4
OL-27710-01
AC Power Supply in the IPS 4300 Series V01 and V02 Chassis
AC Power Supply in the IPS 4300 Series V01 and V02 Chassis
The Cisco IPS 4300 series sensors with the AC power supply can restore the previous power state of the
system if AC power is lost. Earlier IPS 4300s (V01) require you to turn on the power with the power
switch. Newer IPS 4300s (V02) automatically turn on when you plug in the power cable.
system if AC power is lost. Earlier IPS 4300s (V01) require you to turn on the power with the power
switch. Newer IPS 4300s (V02) automatically turn on when you plug in the power cable.
To determine your version, do one of the following:
•
At the CLI, enter the show inventory command and look for V01 or V02 in the output.
•
On the back of the chassis, look at the VID PID label for V01 or V02.
The V01 chassis has the following limitations (these limitations do not apply to the V02 chassis):
•
The sensor requires 50 seconds from the time that AC power is applied before the power state can
be updated and stored. This means that any changes to the power state within the first 50 seconds of
applying AC power will not be observed if AC power is removed within that time.
be updated and stored. This means that any changes to the power state within the first 50 seconds of
applying AC power will not be observed if AC power is removed within that time.
•
The sensor requires 10 seconds from the time it is placed into standby mode before the power state
can be updated and stored. This means any changes to the power state within the first 10 seconds of
entering standby mode (including the standby mode itself) will not be observed if AC power is
removed within that time.
can be updated and stored. This means any changes to the power state within the first 10 seconds of
entering standby mode (including the standby mode itself) will not be observed if AC power is
removed within that time.
For More Information
For information on the AC power supplies in the IPS 4300 series sensors, refer to
.
The Sensor and Jumbo Packet Frame Size
For IPS standalone appliances with 1 G and 10 G fixed or add-on interfaces, the maximum jumbo frame
size is 9216 bytes. For integrated IPS sensors, such as the ASA 5500-X and ASA 5585-X series, refer to
the following URL for information:
size is 9216 bytes. For integrated IPS sensors, such as the ASA 5500-X and ASA 5585-X series, refer to
the following URL for information:
http://www.cisco.com/en/US/docs/security/asa/asa84/configuration/guide/interface_start.html#wp1328
86
86
9
Note
A jumbo frame is an Ethernet packet that is larger than the standard maximum of 1518 bytes (including
Layer 2 header and FCS).
Layer 2 header and FCS).
The ASA IPS Modules and Jumbo Packets
The jumbo packet count in the show interface command output from the lines
Total Jumbo Packets
Received
and
Total Jumbo Packets Transmitted
for ASA IPS modules may be larger than expected
due to some packets that were almost jumbo size on the wire being counted as jumbo size by the IPS.
This miscount is a result of header bytes added to the packet by the ASA before the packet is transmitted
to the IPS. For IPv4, 58 bytes of header data are added. For IPv6, 78 bytes of header data are added. The
ASA removes the added IPS header before the packet leaves the ASA.
This miscount is a result of header bytes added to the packet by the ASA before the packet is transmitted
to the IPS. For IPv4, 58 bytes of header data are added. For IPv6, 78 bytes of header data are added. The
ASA removes the added IPS header before the packet leaves the ASA.