Feature |
Product |
Release introduced |
---|---|---|
For configuration details, see VOSS User Guide. |
||
Flight Recorder for system health monitoring |
5520 Series |
VOSS 8.2.5 |
VSP 4450 Series |
VSP 4000 4.0 |
|
VSP 4900 Series |
VOSS 8.1 |
|
VSP 7200 Series |
VOSS 4.2.1 |
|
VSP 7400 Series |
VOSS 8.0 |
|
VSP 8200 Series |
VSP 8200 4.0 |
|
VSP 8400 Series |
VOSS 4.2 |
|
VSP 8600 Series |
VSP 8600 4.5 |
|
XA1400 Series |
VOSS 8.0.50 |
The Flight Recorder is a high level term for the framework in place on the switch to store both history and current state information for various kernel, system, and application data with minimal overhead to execution. This data can later be accessed on-demand when debugging systems issues to give engineers the best possible troubleshooting information. Functionally, the Flight Recorder consists of two elements; Persistent Memory and Always-on Trace.
The Persistent Memory feature stores information in volatile memory outside of any process. This feature provides information on crashes, errors, and outages that are not the result of a power failure. Persistent Memory data not saved to non-volatile storage before a power failure will be lost. Persistent Memory snapshots are taken when:
a critical process stops functioning
a process stops responding
the hardware watchdog activates
the user initiates a snapshot in the CLI
The Always-on Trace feature creates an ongoing, circular log of every trace call recently executed regardless of the trace level enabled by the user. The Always-On Trace feature uses circular logging, and therefore stores the most recent traces of the process.
Flight Recorder functionality is provided only through CLI. The following commands are used to make use of this feature:
flight-recorder all {slot[-slot][,...]}
For VSP 8600, the valid slots are 1–8, SF1–SF3, all.
The command creates a flight-recorder snapshot, trace and archive.
flight-recorder archive {slot[-slot][,...]}
For VSP 8600, the valid slots are 1–8, SF1–SF3, all.
This command creates a tarball of flight-recorder files, log files, and configuration files.
flight-recorder snapshot {slot[-slot][,...]}.
For VSP 8600, the valid slots are 1–8, SF1–SF3, all.
This command takes a snapshot of PMEM data.
flight-recorder trace {slot[-slot][,...]}
For VSP 8600, the valid slots are 1–8, SF1–SF3, all.
This command takes snapshot of always-on-trace data.