Дорожная карта для Cisco Cisco Packet Data Gateway (PDG)
Redundancy and Availability Features
▀ Service Availability Features
▄ Cisco ASR 5000 Series Product Overview
OL-22938-01
Figure 31. Recommended Redundant Configuration for Data Services - Rear View
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PFU 2
PFU 1
Chassis Airflow Exhaust
from Upper Fan Tray
Maintenance and Failure Scenarios
The following table shows various maintenance and failure scenarios involving the SMC and SPIO cards; and explains
how each situation is resolved.
how each situation is resolved.
Table 22. Service Assurance Features for the SMC and SPIO
Hardware
Failure
Failure
Scenario
Action Taken
Effect on
Accounting
Accounting
Data
Effect on User
Sessions
Sessions
Effect on the
Flow of User
Flow of User
Data Packets
Effect on User
Control
Control
Transactions
Effect on
Management
Management
Traffic
SMC -
Planned
maintenance
Planned
maintenance
Tasks are switched
over to standby
SMC. SPIO remains
active.
over to standby
SMC. SPIO remains
active.
No impact
No impact
No impact
No impact
< 1 sec. Interrupt