Cisco 8800 Series Hardware Installation Manual page 10

Weight and Power Consumption
Weight and Power Consumption
For weight and power consumption, refer to the Physical characteristics table in the
Data
Airflow Direction
The airflow through the fan trays and power supplies on the Cisco 8818, Cisco 8812 and 8808 routers are
from front to back (port side intake). There are four fan trays in the chassis with six fans per tray.
To ensure proper airflow for the router in your facility, position the router with its air intake on a cold aisle
and the air exhaust on a hot aisle.
Maximum Power Available to the Router
The maximum power available for operations depends on the input power from your power source, the number
and output capabilities of your power supplies, and the power redundancy mode that you use.
The following table lists the amount of power available for Cisco 8818, Cisco 8812 and 8808 routers from
all three power trays.
Table 5: Maximum Power Available for a Router with HVAC/HVDC Power Supplies
Total Power
Supply
1
2
3
4
5
6
7
8
9
Hardware Installation Guide for Cisco 8800 Series Routers
4
Sheet.
Combined Mode in Watts (No
redundancy)
6,300
12,600
18,900
25,200
31,500
37,800
44,100
50,400
56,700
Cisco 8800 Series Routers Overview
Cisco 8000 Series Routers
N+1 Redundancy Mode in Watts
(with Single Supply Loss)
—
6,300
12,600
18,900
25,200
31,500
37,800
44,100
50,400
Total Power
Tray
1
2
3