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Cisco Bug: CSCul17693 - Memory pool mibs show lsmpi_io pool with little free memory

Last Modified

Mar 12, 2020

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.1(3)S1 15.4(2)S 15.4(3) 15.4(99.99) 16.6.1

Description (partial)

On the ASR1000 platform family, CISCO-ENHANCED-MEMPOOL-MIB & CISCO-MEMORY-POOL-MIB show lsmpi_io pool with little free memory.  As a result, various SNMP management software applications may generate an error/notification.

This condition is shown from the moment the router boots up.

The lsmpi_io pool is used on the Route Processor of all ASR1000 routers. Unlike other IOS versions IOSd on the ASR is a process running on IOS XE. IOSd has a single logical interface which communicates to IOS XE. This interface is called the Linux Shared Memory Punt Interface (LSMPI). When the ASR1000 boots the lsmpi_io pool is created and nearly all of the memory is allocated up front by design. Therefore, the little free memory shown in the MIBs is by design and does not indicate an error condition.

The LSMPI interface is described further in this document:
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