Cisco Cisco Packet Data Gateway (PDG) Documentation Roadmaps
ST16 Hardware Platform Overview
▀ Chassis Configurations
▄ Cisco ASR 5000 Series Product Overview
OL-22937-01
Chassis Configurations
The system is designed to scale from a minimum configuration as listed in the table below to a fully-loaded redundant
configuration containing a maximum of 48 cards.
configuration containing a maximum of 48 cards.
Important:
If Session Recovery is enabled, the minimum number of Packet Accelerator Cards (PACs) per
chassis increases from one to four cards. Three PACs are active and one PAC is standby (redundant). This minimal
configuration is designed to protect against software failures only. In addition to increased hardware requirements,
Session Recovery may reduce subscriber session capacity, performance, and data throughput.
configuration is designed to protect against software failures only. In addition to increased hardware requirements,
Session Recovery may reduce subscriber session capacity, performance, and data throughput.
Table 3. ST16 Chassis Hardware Configuration
Component
Supported Starent
Product
Minimum per
Chassis
Minimum for Redundant
Chassis Configuration
Maximum per
Chassis
Switch Processor Card (SPC)
1
2
2
Packet Accelerator Card (PAC)
(Data application card)
(Data application card)
1
2*
14
Switch Processor I/O (SPIO) Card
1
2
2
Redundancy Crossbar Card (RCC)
0
2
2
Power Filter Unit (PFU)
2
2
2
Upper Fan Tray Assembly
1
1
1
Lower Fan Tray Assembly
1
1
1
Line Cards
Fast Ethernet (10/100) Line Card
(FELC)
(FELC)
All
1
2
28**
Gigabit Ethernet Line Card (GELC)
All
1
2
28**
Notes:
1. These numbers represent the minimum number of components with no redundancy.
2. These numbers represent the minimum number of components with hardware redundancy. Additional components
are required if Session Recovery is to be supported.
are required if Session Recovery is to be supported.
*1:1 redundancy is supported for these cards however some subscriber sessions and accounting information may be lost
in the event of a hardware or software failure even though the system remains operational.
in the event of a hardware or software failure even though the system remains operational.
**The physical maximum number of line cards you can install is 28; however, redundant configurations may use fewer
than the physical maximum number of line cards since they are not required behind standby PACs.
than the physical maximum number of line cards since they are not required behind standby PACs.
This diagram shows exploded views of the front and rear chassis components. They are described in the table that
follows:
follows: