Cisco 2811 router


Cisco 2811 router



  • Default: 256 MB
  • Maximum: 768 MB
Compact Flash
  • Default: 64 MB
  • Maximum: 256 MB
Fixed USB 1.1 Ports 2
Onboard LAN Ports 2-10/100
Onboard AIM (Internal) Slot 2
Interface Card Slots 4 slots, each slot can support HWIC, WIC, VIC, or VWIC type modules
Network-Module Slot 1 slot, supports NM and NME type modules
Extension Voice Module Slot 0
PVDM (DSP) Slots on Motherboard 2
Integrated Hardware-Based Encryption Yes
VPN Hardware Acceleration (on Motherboard) DES, 3DES, AES 128, AES 192, and AES 256
Optional Integrated In-Line Power (PoE) Yes, requires AC-IP power supply
Console Port (up to 115.2 kbps) 1
Auxiliary Port (up to 115.2 kbps) 1
Minimum Cisco IOS Software Release 12.3(8)T
Rack Mountable Yes, 19- and 23-in. options
Wall Mountable Yes
Power Requirements
AC Input Voltage 100 to 240 VAC, autoranging
AC Input Frequency 47-63 Hz
AC Input Current 2A (110V) 1A (230V)
AC Input Surge Current 50A maximum, one cycle
AC-IP Maximum In-Line Power Distribution 160W
AC-IP Input Current 4A (110V) 2A (230V)
AC-IP Input Surge Current 50A maximum, one cycle
DC Input Voltage 24 to 60 VDC, autoranging positive or negative
DC Input Current
  • 8A (24V)
  • 3A (60V)
  • Startup current 50A<10 ms
Typical Power Dissipation (No Modules) 32W (109 BTU/hr)
Power Dissipation-AC without IP Phone Support 170W (580 BTU/hr)
Power Dissipation-AC with IP Phone Support-System Only 210W (717 BTU/hr)
Power Dissipation-AC with IP Phone Support-IP Phones 160W (546 BTU/hr)
Power Dissipation-DC 180W (614 BTU/hr)
RPS External only, connector for RPS provided by default
Recommended RPS Unit Cisco RPS-2300 Redundant Power System
Environmental Specifications
Operating Temperature 32° to 104°F (0° to 40°C)
Non-Operating Temperature -40° to 158°F (-40° to 70°C)
Maximum Operating Temperature at Altitude
  • 40°C @ sea level
  • 40°C @ 6,000 ft (1800 m)
  • 30°C @ 13,000 ft (4000 m)
  • 27.2°C @ 15,000 ft (4600 m)
    Note: Derate 1.4°C per 1,000 ft above 6,000 ft
Operating Humidity 5 to 85%RH, non-condensing
Dimensions (H x W x D)
  • 1.75 x 17.25 x 16.4 in.
  • (44.5 x 438.2 x 416.6 mm)
Rack Height 1 rack unit (1RU)
Weight (Fully Configured) 14 lb (6.4 kg)
Noise Level (Min/Max)
  • 47 dBA for normal operating temperature (<90°F/32.2°C)
  • 57 dBA (@ maximum fan speed)



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