OmniSwitch OS6860/OS6900/OS10K Troubleshooting Guide Part No.032996-00 Rev.A
AOS Release 7.X and 8.X January 2015
Alcatel-Lucent Page 14 of 148
Find the specific chapter in this troubleshooting guide for the task causing high CPU. It is possible
that the task needs to be restarted. Before restarting the task, please contact Alcatel-Lucent
customer support.
5. Identify abnormal traffic
It's worthwhile to verify how many packets are trapped by the CPU due to FFP rules (packets may be
trapped to the CPU due to other reasons—see chapter Packet Driver for more details). The following
commands will be helpful to locate abnormal traffic by showing the type and number of packets.
debug qos internal "chassis 1 slot 1 list 1 verbose"
Entry U Slice CIDU CIDL MIDU MIDL TCAM Count[+] Green[+] Red[+] NotGreen[+]
List 1: 41 entries set up
HgMcastARP(16) 0 14 - 3642 - - 3684 18656[18656] 0[0] 0[0] 0[0]
HgMcastARP(16) 0 15 - - - - 3940 18656[0] 0[0] 0[0] 0[0]
McastARP(17) 0 14 3591 - - - 3685 0[0] 0[0] 0[0] 0[0]
McastARP(17) 0 15 - - - - 3941 0[0] 0[0] 0[0] 0[0]
ISIS_BPDU1(22) 0 14 - 3584 -- 3639 0[0] 0[0] 0[0] 0[0]
ISIS_BPDU1(22) 0 15 - - - - 3895 0[0] 0[0] 0[0] 0[0]
ISIS_BPDU2(23) 0 14 3585- - - 3640 0[0] 0[0] 0[0] 0[0]
2.5. Memory Leak
The following output shows memory utilization by process and can be helpful in determing which task is
consuming memory, or if memory for a specific task is gradually increasing in the case of a memory leak.
SHASTA #-> top -b -n 1 -m | head
Mem total:2021900 anon:306672 map:639136 free:846800
slab:35708 buf:572 cache:743544 dirty:4 write:0
Swap total:0 free:0
PID VSZ^VSZRW RSS (SHR) DIRTY (SHR) STACK COMMAND
2022 161m 135m 81244 10004 81228 9992 132 /bin/bcmd -p
1856 92640 83368 8108 7296 8108 7296 132 /bin/dhcpv6srv
1868 91796 83240 8108 7276 8108 7276 132 /bin/dhcpsrv
2102 40620 22688 29864 10196 29844 10180 132 /bin/qosnid
2081 38956 20208 19468 10452 19444 10432 132 /bin/slNi
2105 32660 15884 22692 9888 22652 9856 132 /bin/ipmsni
2.6. Packet Driver
The packet driver is responsible for filtering and classifying all frames and packets trapped to the CPU.
SHASTA #-> cat /proc/pktdrv
Board Type : 0x6062202
Tb : 4fa13fbd8f93d
Wakeups : 26647195 26647194
Last Task Wakeup : 0 0
Last Task Ran : 4fa13fbd8ae6c 8903c213fe
Task Latency : 3b fffb067507e965cd
Task Max Latency : fffffffffffffffc fffb067507e9658e
TX Chain Ints : 24887887 24887884
TX Desc Ints : 0 0
TX Timeout Ints : 0 0
…..
Buffer States
Invalid : 1
Free : 1947
Classify : 0
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