user manual

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Cisco ASR 9000 Series Aggregation Services Router Overview and Reference Guide
OL-17501-09
Chapter 1 Overview and Physical Description
Management and Configuration
Cooling Path
• The Cisco ASR 9010 Router chassis has a front-to-rear cooling path. The inlet is at the bottom front
of the chassis, and the exhaust is at the upper rear. Figure 2-64 shows the cooling path of the
Cisco ASR 9010 Router chassis.
• The Cisco ASR 9006 Router chassis has a side-to- top-to-rear cooling path. The inlet is at the right
side of the chassis, and the exhaust is at the upper rear. Figure 2-65 shows the cooling path of the
Cisco ASR 9006 Router chassis.
• The Cisco ASR 9904 Router has a side-to-side cooling path. Figure 2-66 shows the cooling path of
the Cisco ASR 9904 Router chassis. The inlet is at the right side of the chassis, and the exhaust is
at the left side.
If the router is installed in a 2-post 23-inch rack, air flow is circulated front-to-back. An optional air
baffle accessory kit (ASR-9904-BAFFLE=) is available for mounting the router chassis in this
configuration. For air baffle installation information, see:
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
• The cages of the Cisco ASR 9922 Router chassis have a front-to-rear cooling path. The inlet is at
the front of the middle cage, and the exhaust is at the upper and lower rear. Figure 2-67 shows the
cooling path of the Cisco ASR 9922 Router chassis.
• The Cisco ASR 9912 Router chassis has a front-to-rear cooling path. The inlet is at the front of the
RP/FC card cage, and the exhaust is at the upper rear. Figure 2-68 shows the cooling path of the
Cisco ASR 9912 Router chassis.
Fan Trays
The Cisco ASR 9010 Router, Cisco ASR 9006 Router, and Cisco ASR 9912 Router contain two fan
trays for redundancy (see Figure 2-69, Figure 2-70, Figure 2-72). The Cisco ASR 9904 Router contains
a single fan tray for redundancy (see Figure 2-71). The Cisco ASR 9922 Router contains four fan trays
for redundancy (see Figure 2-72). The fan tray has an LED indicator to indicate fan tray status. If a fan
fails, it is possible to swap a single fan tray assembly while the system is operational. Fan tray removal
does not require removal of any cables.
Note Due to air leakage, the chassis should not be operated with any of the fan trays completely missing.
Replace any missing fan tray within five minutes. Any fan tray replacement should be performed when
the chassis is back to room temperature.
Management and Configuration
The Cisco ASR 9000 Series Routers run IOS XR software and use the system manageability
architecture of that operating system. The system management interfaces consist of the following three
protocols running on the Cisco ASR 9000 Series Routers:
• CLI—Command-line interface
• XML—Extensible Markup Language
• SNMP—Simple Network Management Protocol
By default, only CLI on the console is enabled.