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Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
OL-28417-02
Troubleshooting the Cisco IOS XR Software
Memory Warnings in Configuration Sessions
Configuration Errors at Startup
Configuration errors that occurred during system startup can be displayed with the show configuration
failed startup command. For example:
RP/0/RSP0/CPU0:router# show configuration failed startup
!! CONFIGURATION FAILED DUE TO SYNTAX ERRORS
ntp
http server
Memory Warnings in Configuration Sessions
The Cisco IOS XR software automatically monitors and manages the system resources in a router.
Under normal operating conditions, memory problems should not occur.
When a low-memory issue does occur, it is often in the form of a low-memory warning during a
configuration session. Low-memory conditions can be caused by multiple, large configurations being
added to the router at a single time. Users can remove the source of a problem by removing
configurations.
The following sections describe the commands used to display memory usage in a router and what to do
if a low-memory warning appears:
• Understanding Low-Memory Warnings in Configuration Sessions, page 144
• Displaying System Memory Information, page 145
• Removing Configurations to Resolve Low-Memory Warnings, page 146
• Contacting TAC for Additional Assistance, page 148
Understanding Low-Memory Warnings in Configuration Sessions
The Cisco IOS XR software monitors memory usage in the router. If system memory becomes low, an
error message appears when you attempt to enter configuration mode.
An “out-of-memory” error message appears during one of the following situations:
• When a user attempts to enter configuration mode.
• During a configuration session when the memory shortage occurs.
• When a user attempts to load a target configuration from a large file that results in a memory
shortage.
• During a commit operation that results in the low-memory warning message. The commit operation
is denied and only lr-root users can perform commit operations to remove configurations.
Caution Never ignore a low-memory warning. These warnings indicate a memory state that could affect system
operations if not addressed.
“WARNING! MEMORY IS IN MINOR STATE”
If the system memory begins to run low, the following minor memory warning appears when you enter
a new configuration mode:
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