Cisco Cisco IOS Software Release 12.4(23)

This section provides the following configuration examples:

Chunk validation is not enabled by default when the router boots and cannot be configured to 
startup-config. You must explicitly configure the chunks keyword in the CLI once the router boots up. 
The following example shows how to configure the chunks keyword and check for a given PC (sibling 
as well as root):

Router(config)# scheduler heapcheck process memory checktype chunks 0x607F7B98

Checktype value 0x0

mempool_check_type = 0x20, mempool_check_pc = 0x607F7B98

In this example the output is displayed for the show chunk command. The show chunk command 
checks for the number of chunks and siblings created and destroyed.

Router(config)# show chunk

Chunk Manager:

532 chunks created, 69 chunks destroyed

261 siblings created, 68 siblings trimmed

Chunk element  Block Maximum  Element Element Total

cfgsize Ohead   size element    inuse   freed Ohead    Name

   16        0    20052      995       28     967    4080   Managed Chunk  

0x64A27040

   16        4    10052      412      412       0    3408   List Elements 

0x64A2BE94

   16        4    11028      453       78     375    3728   (sibling) 

0x6593ED74

0x6593F6F0: EF4321CD 00000000 00000000 00000000  oC!M............

0x6593F700: 0x6593ED74 EF4321CD 00000000 00000000  e.mtoC!M........

The following example shows how to configure the Malloc lite-chunks keyword and check for the 
Malloc lite-chunk structures in the router memory:

Router(config)# scheduler heapcheck process memory processor checktype lite-chunks

Router(config)# show run | in sched

scheduler heapcheck process memory processor checktype magic lite-chunks

+