Chapter 6 Troubleshooting the Cisco IOS XR Software

Memory Warnings in Configuration Sessions

F I N A L D R A F T — C i s c o C o n f i d e n t i a l

•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.

WARNING! MEMORY IS IN MINOR STATE

Although users are allowed to enter configuration mode, they should immediately reduce memory usage using the tools described in the “Removing Configurations to Resolve Low-Memory Warnings” section on page 6-9.

Failure to take action can result in a worsening situation and eventual impact to router operations.

“ERROR! MEMORY IS IN SEVERE (or CRITICAL) STATE”

When the memory is in a severe or critical state, router operation and performance is likely to be affected. Regular users are not allowed to enter configuration mode. Only lr-root owners can enter configuration mode to free memory by removing configurations.

In some situations, the commit command is not allowed. Users with lr-root access can still use the commit force command to apply configurations that reduce memory usage. Reducing memory usage normally means removing configurations, but a user can also add configurations that reduce memory usage. For example, configuring the shutdown command on an interface could cause numerous routes to be purged from the Routing Information Base (RIB), and Forwarding Information Base (FIB) configurations.

Caution The commit force command should be used only to apply configurations that reduce memory usage. Adding configurations that increase memory usage could result in serious loss of router operation.

Viewing System Memory Information

To display a high level summary of system memory, type the show memory summary command. describes the meaning of each heading.

RP/0/RSP0/CPU0:router# show memory summary

Physical Memory: 2048M total

Application Memory : 1787M (1509M available)

Image: 132M (bootram: 132M)

Reserved: 128M, IOMem: 0, flashfsys: 0

Total shared window: 0

RP/0/RSP1/CPU0:router#

To display general memory usage for the device as a whole and by process, type the show memory command. describes the meaning of each heading.

RP/0/RSP0/CPU0:router# show memory

Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide

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Cisco Systems A9K24X10GETR, ASR 9000 manual Viewing System Memory Information, ERROR! Memory is in Severe or Critical State
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A9KMOD80TR, A9K24X10GETR, ASR 9000 specifications

Cisco Systems has long been a leader in networking technology, providing cutting-edge solutions for service providers and enterprise organizations alike. Among their standout products is the Cisco ASR 9000 Series Aggregation Services Routers, notably the A9K24X10GETR and the A9KMOD80TR models. These routers are engineered to deliver unmatched performance, scalability, and versatility for networks that require high bandwidth and low latency.

The Cisco ASR 9000 Series is built for the needs of today's complex service provider and enterprise networks. A significant feature of the A9K24X10GETR is its 24-port 10-Gigabit Ethernet module. This functionality allows for high-density connectivity, making it ideal for aggregating numerous connections to different parts of a network while maintaining optimal performance. Whether used for Internet service providers delivering high-speed connectivity or for enterprises looking to connect multiple branches, the A9K24X10GETR provides robust and reliable data transmission.

Further enhancing the capabilities of the ASR 9000 is the A9KMOD80TR module, which supports an extensive range of services. This module is designed to run a variety of technologies, including Layer 2 and Layer 3 services, MPLS (Multiprotocol Label Switching), and IPv6. Its ability to integrate seamlessly into existing infrastructures while providing the advanced features customers demand makes it an invaluable asset for network engineering teams.

Another cutting-edge technology present in the ASR 9000 Series is its support for eBGP (External Border Gateway Protocol), which plays a critical role in managing traffic across multiple networks. The routers are equipped with advanced telemetry features, empowering operators with real-time insights into network performance and health. Additionally, they come with integrated security features that protect against DDoS threats and other vulnerabilities.

In summary, Cisco's ASR 9000 Series, particularly the A9K24X10GETR and A9KMOD80TR, combines high-density connections, extensive service support, and advanced security and telemetry capabilities. These routers are perfect for demanding environments where reliable performance and adaptability are crucial. With their focus on innovation and performance, Cisco continues to shape the future of networking technology.
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