Hot Swapping Supervisor Engines And Modules; Power Management And Environmental Monitoring; Osm Technology Overview - Cisco 7603 - Modular Expansion Base Installation Manual

Chapter 1 Product Overview

Hot Swapping Supervisor Engines and Modules

The Cisco 7600 series routers provide a feature for removing and replacing the redundant
supervisor engine, OSMs, Catalyst 6000 family modules, and SIPS without powering down the system.
This feature is known as hot swapping.
Although the FlexWAN and Enhanced FlexWAN modules support hot swapping, individual port
Note
adapters do not. To replace port adapters, you must first remove the FlexWAN module from the chassis
and then replace port adapters as required.
When you remove or insert a module while the router is powered on and operating, the system does the
following:
1.
2.
3.
4.
The system runs diagnostic tests on any new interfaces. If the test passes, the system is operating
normally. If the new module is faulty, the system resumes normal operation but leaves the new interface
disabled.
If the diagnostic test fails, the system crashes, which usually indicates that the new module has a problem
in the bus and should be removed.
When you install two supervisor engines, hot swapping allows you to remove and replace one of the
supervisor engines without turning off the system power.
To avoid erroneous failure messages, note the current configuration of all interfaces before you remove
Caution
or replace another module, and allow at least 15 seconds for the system to reinitialize after a module has
been removed or replaced.

Power Management and Environmental Monitoring

For detailed information on power management and environmental monitoring, refer to the Cisco 7600
Series Internet Router Software Configuration Guide.

OSM Technology Overview

This section provides an overview of SONET/SDH and ATM:
•
•
OL-5077-7
Determines if there is sufficient power for the module.
Scans the backplane for configuration changes.
Initializes all newly inserted modules, notes any removed modules, and places them in the
administratively shutdown state.
Places any previously configured interfaces on the module back to the state they were in when they
were removed. Any newly inserted interfaces are put in the administratively shutdown state, as if
they were present (but unconfigured) at boot time. If you insert a similar module type into a slot, its
ports are configured and brought online up to the port count of the original module.
SONET/SDH Overview, page 1-40
ATM Overview, page 1-40
Hot Swapping Supervisor Engines and Modules
Book Title
1-39