Chapter 1: Routing 1-39
Routing
QoS), Multiprotocol Label Switching (MPLS), and Hierarchical Virtual Private LAN Services (H-VPLS). The
ASIC provides line-rate performance and offers advanced services including access control list (ACL) and
H-QoS without affecting performance. The Carrier Ethernet ASIC incorporates innovative traffic-
management capabilities while providing intelligent packet switching and routing operations.
• Service richness—With the Cisco ASR 903 Router, customers will be able to deliver services ranging from
basic TDM, ATM, and Ethernet services to advanced feature-rich and secure MPLS services, including
Pseudo Wire Emulation (PWE), Carrier Ethernet (CE), Multiprotocol Label Switching Transport Profile (MPLS-
TP), MPLS Layer 2 VPNs (MPLS L2VPNs), and MPLS Layer 3 VPNs. The service offering is enhanced with
rich operations, administration, and management (OAM) functions including: IEEE 802.1ag Connectivity Fault
Management (CFM), IP service-level agreement (IP SLA), Y.1731 Fault Management and Performance
Management, Bidirectional Forwarding Detection (BFD), and MPLS OAM.
Specifications
Selected Part Numbers and Ordering Information
Model Cisco ASR 903
Dimensions (H x W x D)
5.22 x 17.44 x 9.22 in. (132.6 x 443 x 234.2 mm)
Chassis Height
3RU
Cisco ASR 900 Series RSP
Dual redundant RSPs in 2 slots
Cisco ASR 900 Series IMs
6 Interface Module slots
“Commons” Components
•Two RSPs
•One fan tray
• Two Power Supplies (either DC or AC)
Reliability and Availability
• Fan redundancy
• Feed redundancy
• Power-supply redundancy
• RSP redundancy
• Software redundancy
Rack Mounting
Ye s :
•ETSI
• 19 inch
• 23 inch
Airflow
Side-to-Side
Capacity
RSP
• 55Gbps
• Active /Standby non-blocking operation mode in dual RSP redundant configuration
• Fully redundant in dual RSP redundant configuration
• Built-in service-intelligence and traffic- prioritization capability
Thermal
• Twelve high-efficiency fans per tray
• Variable-speed fans for optimal thermal performance
• Fully operational in single fan failure scenario
Power
• Maximum 550Watt input power
• Up to 2 power supplies (AC or DC)
Note: Mixing of AC and DC modules is not supported.
• Module redundancy: 1:1
• Modules operate in load share mode.
Cisco ASR 903 Series Aggregation Services Routers —Chassis, Fan tray, RSPs, Power supplies
ASR-903 ASR 903 Router Chassis
A903-FAN ASR 903 FAN Tray
A900-PWR550-A ASR 900 550W AC Power Supply
A900-PWR550-D ASR 900 550W DC Power Supply
A900-RSP1A-55 ASR 900 Route Switch Processor 1, Base Scale, 55Gbps
A900-RSP1B-55 ASR 900 Route Switch Processor 1, Large Scale, 55Gbps
Cisco ASR 903 Series Aggregation Services Routers —Interface Modules
A900-IMA8T ASR 900 8 port 10/100/1000 Ethernet Interface Module
A900-IMA8S ASR 900 8 port SFP Gigabit Ethernet Interface Module
A900-IMA1X ASR 900 1 port 10GE XFP Interface Module
A900-IMA16D ASR 900 16 port T1/E1 Interface Module
(42 pages)
(28 pages)
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