
Benefits of Online Offline Diagnostics
•
Improved Troubleshooting
. Field diagnostics verifies whether a line card problem is hardware-related
or not. If the problem is software-related, the Field Diagnostic image allows customer to quickly rule
out hardware related cause and focus on fixing the software issue causing the problem.
•
Pre-installation Line Card Hardware Verification
. Field diagnostics verifies whether a line card has
hardware problems before installing the line card in a Cisco cBR Series router.
•
Onsite Fault Detection
. Field diagnostics helps to confirm if the problem is hardware-related and if it
is necessary to replace the line card.
•
Additional Uptime
. Field diagnostics ensures that line cards are not mistakenly taken offline if the
problem is not hardware-related, thereby increasing network uptime.
Prerequisites for Online Offline Diagnostics
•
Before running the OOD Field Diagnostic tests on the working (active) line card in an N + 1 redundancy
setup, it is advisable to switch over to the protect (standby) line card before loading the Field Diagnostic
image to the line card to avoid service interruption.
•
After an OOD Field Diagnostic image is loaded to the line card, the line card goes offline. Therefore,
schedule a downtime for the line card to be tested before performing field diagnostic tests.
•
Before performing any field diagnostic test, unplug all cables on the device that connect to other interfaces.
If the cables that connect interfaces are not unplugged, some field diagnostic tests may send packets to
connected devices, which increments packet counters on the receiving interfaces.
Restrictions for Online Offline Diagnostics
•
When accessing a router through Telnet while running an OOD Field Diagnostic test, testing progress
messages do not appear on the screen.
•
If supervisor switchover occurs during a field diagnostic test, the test stops immediately and the line
card run-time image automatically replaces the Field Diagnostic image on the line card.
•
This feature is supported on CBR-CCAP-LC-40G line card in Cisco IOS-XE release 3.18.0S and later
releases.
•
It is suggested to run OOD on one line card at a time to avoid service impact.
•
To run OOD on multiple line cards, leave 5 to 10 minutes gap before loading the OOD image to the
next line card.
Cisco cBR Series Converged Broadband Routers Troubleshooting and Network Management Configuration
Guide for Cisco IOS XE Fuji 16.8.x
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Online Offline Diagnostics
Benefits of Online Offline Diagnostics