[f-nsp] BigIron 15000 CPU Spikes

[Brent Van Dussen]

Everything looks fine, the CPU is only 10% busy according to the outputs 
that you sent us.  That 79 percent reading is kind of bogus, as noted in 
the disclaimer just below it.  dm raw is the command you want to use if you 
ever see the CPU truely getting spiked, it will show you every type of 
packet that is getting sent to the CPU for forwarding decisions.

-Brent


At 03:40 AM 5/8/2007, FAHAD ALI KHAN wrote:
>Guys
>
>We have recently facing issue of CPU spikes in BigIron 15000. These spikes 
>arrive 3 to 4 time in a day but this spikes didnt have any specific 
>pattern. During this spikes no abnormality was faced and traffic rate was 
>also found normal, no interface or neighborship flaps. we are running 
>Static, OSPF, BGP w/o complete internet feed, switch trunk.Complete specs 
>of BigIron is BigIron 15000 with J-BxGMR4 JetCore Management Module 
>(active/standby config) and flash code of B2R07802.
>
>Following are the some statistics in busy times,
>
>sh cpu
>79 percent busy, from 700551 sec ago
>It's been more than 50 hours since last call, the CPU utilization
>data collected may have wrapped around and result in high
>utilization
>1   sec avg: 10 percent busy
>5   sec avg:  8 percent busy
>60  sec avg:  9 percent busy
>300 sec avg: 10 percent busy
>
>sh ip route
>Total number of IP routes: 3412, avail: 136489 (out of max 140000)
>
>sh memory
>Total DRAM: 536813568 bytes
>   Dynamic memory: 511647740 bytes total, 361944208 bytes free, 29% used
>       BGP memory: 788800 bytes (<1%) used from dynamic memory
>      OSPF memory: 1828228 bytes (<1%) used from dynamic memory
>
>sh proc cpu
>Process Name   5Sec(%)   1Min(%)   5Min(%)   15Min(%)   Runtime(ms)
>ACL                    1.36         1.76        1.57           1.38 
>26786013
>ARP                    0.81          0.69        0.62          0.57 
>14575772
>AT                       0.00         0.00        0.00          0.00 
>        0
>BGP                    0.01         0.01        0.01          0.01 
>394056
>DOT1X                 0.00         0.00        0.00          0.00 
>     0
>GVRP                  0.00         0.00        0.00          0.00 
>     0
>ICMP                   0.11         0.13          0.11         0.12 
>3084780
>IP                        5.19         5.89         5.19         4.74 
>  91133089
>IP_M                   0.00         0.00         0.00          0.00 
>  243013
>IPUP                   0.05         0.06         0.06          0.06 
>1690370
>IPX                      0.00         0.00         0.00          0.00 
>         0
>L2VLAN               0.11         0.14         0.13          0.14 
>3500599
>NAT                     0.00         0.00         0.00          0.00 
>        0
>OSPF                  1.82         2.93         1.61          1.43 
>32622091
>RIP                      0.00         0.00          0.00          0.00 
>       2604
>STP                     0.00         0.00         0.00          0.00 
>   110790
>VRRP                  0.00         0.00         0.00          0.00 
>      0
>
>Is there any one ever faced this issue with BigIron 15000?
>
>Regards
>
>Fahad
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