Packet Processing Card Redundancy - Cisco ASR 5000 Series Installation Manual

Application Card Installation
The following table details the specific ASR 5000 chassis slot assignments for each of the above card types.
Table 26. Application Card Slot Assignments
Application Card Type
System Management Card (SMC)
Packet Processing Cards
Important:
cards within the chassis from the middle of the chassis outward. Leave an empty slot between the cards, when possible.
For example, for four PSC2s, use slots 3, 5, 12, and 14. For two PSC2s, use slots 5 and 12. For more detailed
information on SMCs and packet processing card types, refer to the Hardware Platform Overview chapter.

Packet Processing Card Redundancy

To optimize network efficiency and minimize down time, the system supports 1:n redundancy for packet processing
cards of the same type.
When the system boots up, all packet processing cards enter standby mode, which means that the cards are available for
use but offline. Installed components are made active through the software configuration process. Cards that are not
configured to enter active mode, which brings them online, remain in standby mode as redundant components. Packet
processing cards that normally operate in standby mode do not require line cards to be installed directly behind them, as
these line cards are not used.
In the event of packet processing card failure, tasks are migrated from the active packet processing card to the standby
card. The line card installed behind the packet processing card that was formerly active maintains the interfaces to the
external network equipment. Redundancy Crossbar Cards (RCCs) provide a path for signalling and data traffic between
the line card and the now active packet processing card.
Important:
Chassis Slot Number(s)
8
9
1 through 7 and
10 through 16
To achieve optimal airflow performance in minimum system deployments, populate packet services
For additional information about RCCs, refer to Line Card Installation in this guide.
Description
Primary SMC
Redundant SMC
Active or redundant packet processing cards all of the same
type
Chassis Slot Numbering and Assignments ▀
ASR 5000 Installation Guide ▄
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