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Cisco Bug: CSCsz05090 - PPP with compression has traceback @ ppp_compress_input_pak_eh

Last Modified

Jan 29, 2017

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)


Under extreme packet loads with software compression over PPP configured, error
messages similar to the following may be displayed:

Apr 10 10:35:07.003 PST: %SYS-2-MALLOCFAIL: Memory allocation of 1740 bytes failed from 0x21437888, alignment 128 
Pool: I/O  Free: 36736  Cause: Memory fragmentation 
Alternate Pool: None  Free: 0  Cause: No Alternate pool 
 -Process= "PPP Compress Input", ipl= 0, pid= 177,  -Traceback= 0x2316BB28z 0x2142C850z 0x2142CF70z 0x21432B1Cz 0x21FAE46Cz 0x21FAC26Cz 0x231D62ACz 0x231D6410z 0x2313CE28z 0x2313CE0Cz 


This symptom has been observed with software compression and with extremely high
incoming packet rates, such that packets are arriving faster than they can be decompressed.
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