What is the cause of high utilization of cpu on fpc.Below is the output of which depicts utilization as 99 but router is running just fine.
show chassis fpc
Temp CPU Utilization (%) Memory Utilization (%)
Slot State (C) Total Interrupt DRAM (MB) Heap Buffer
0 Online 69 99 14 512 17 43
1 Online 69 99 14 512 17 43
But on the other hand routing-engine showing CPU as 94 percent idle.
show chassis routing-engine
Routing Engine status:
Temperature 52 degrees C / 125 degrees F
DRAM 1536 MB (1536 MB installed)
Memory utilization 35 percent
CPU utilization:
User 4 percent
Background 0 percent
Kernel 2 percent
Interrupt 0 percent
Idle 94 percent
Model RE-ACX-2100
Serial ID xxxxxxxxxxx
Start time 2017-12-20 16:18:07 PKT
Uptime 510 days, 12 hours, 52 minutes, 41 seconds
Last reboot reason 0x1:power cycle/failure
Load averages: 1 minute 5 minute 15 minute
0.18 0.13 0.08
What could be the cause of such high utilization on fpc?
Second what is the difference/significance between two cpu utilizations?
Best Answer
The two CPU utilisation figures are for the forwarding plane/line card and the routing engine respectively.
For the control-plane, you can run
show system processes extensive
to get an idea as to which process is consuming the most CPU on the Routing Engine.For the forwarding-plane, you'll need to jump on the FPC or FEB depending on your device model. Use
start shell pfe network feb0
to open up a session to the forwarding engine on your ACX and then run:show sched
show threads
to get an indication about what is using all the FPC CPU. It may be that you're doing something like IPSEC or NAT at a high PPS rate.