Datasheet

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Technical
Specifications
Cisco 4451-X
Cisco 4431
Cisco 4351
Cisco 4331
Cisco 4321
Default memory
double-data-rate 3
(DDR3) error-
correction-code (ECC)
DRAM (Combined
control/services/data
planes)
NA
NA
4 GB
4 GB
4 GB
Maximum memory
DDR3 ECC DRAM
(Combined
control/services/data
planes)
NA
NA
16 GB
16 GB
8 GB
Default memory DDR3
ECC DRAM (data
plane)
1 GB
1 GB
NA
NA
NA
Maximum memory
DDR3 ECC DRAM
(data plane)
2 GB
2 GB
NA
NA
NA
Default memory DDR3
ECC DRAM
(control/services
plane)
4 GB
4 GB
NA
NA
NA
Maximum memory
DDR3 ECC DRAM
(control/services
plane)
16 GB
16 GB
NA
NA
NA
Default flash memory
8 GB
8 GB
4 GB
4 GB
4 GB
Maximum flash
memory
32 GB
32 GB
16 GB
16 GB
16 GB
External USB 2.0 slots
(type A)
2
2
2
1
1
USB console port -
type B mini (up to
115.2 kbps)
1
1
1
1
1
Serial console port -
RJ45 (up to 115.2
kbps)
1
1
1
1
1
Serial auxiliary port -
RJ45
(up to 115.2 kbps)
1
1
1
1
1
Power-supply options
Internal: AC, DC and
PoE
Internal: AC, DC, and
PoE
Internal: AC, DC, and
PoE
Internal: AC and PoE
External: AC and PoE
Redundant power
supply
Internal: AC, DC and
PoE
Internal: AC, DC, and
PoE
N/A
N/A
N/A
Power Specifications
AC input voltage
100 to 240 VAC
autoranging
100 to 240 VAC
autoranging
100 to 240 VAC
autoranging
100 to 240 VAC
autoranging
100 to 240 VAC
autoranging
AC input frequency
47 to 63 Hz
47 to 63 Hz
47 to 63 Hz
47 to 63 Hz
47 to 63 Hz
AC input current
range, AC power
supply (maximum)
7.1 to 3.0A
3 to 1.3A
7.1 to 3.0A
3 to 1.3A
1.5 to 0.6A
AC input surge
current
<50 A
60 A peak and less
than 5 Arms per half
cycle
60 A peak and less
than 12 Arms per half
cycle
60 A peak and less
than 5 Arms per half
cycle
90 A peak and less
than 3 Arms per half
cycle
Typical power (no
modules) (watts)
158
65
48
42
36