03-14-2007 04:06 AM - last edited on 03-25-2019 03:54 PM by ciscomoderator
Hello Pro's
I have this issue:
High cpu utilization (IP INPUT).
GiFi event manager is on 192.168.120.6 collects events from PCs (e.g. 192.168.114.81). At the time GiFi collects it's data, CPU utilization level is about 70%.
Take a look at the time stamps in log(see below), TCP ACK numbers (they are the same!!!).
Packets routed via FIB. Does it mean they go through CPU (IP INPUT)?
How to decrease CPU load?
Here's debug ip pack det log:
==============================================
Mar 14 13:59:50.377: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), g=192.168.120.6, len 576, forward
Mar 14 13:59:50.377: TCP src=445, dst=4150, seq=2279847765, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.377: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), len 576, sending full packet
Mar 14 13:59:50.377: TCP src=445, dst=4150, seq=2279847765, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.377: IP: tableid=0, s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), routed via FIB
Mar 14 13:59:50.377: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), g=192.168.120.6, len 576, forward
Mar 14 13:59:50.377: TCP src=445, dst=4150, seq=2279848301, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.377: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), len 576, sending full packet
Mar 14 13:59:50.377: TCP src=445, dst=4150, seq=2279848301, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.377: IP: tableid=0, s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), routed via FIB
Mar 14 13:59:50.377: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), g=192.168.120.6, len 576, forward
Mar 14 13:59:50.377: TCP src=445, dst=4150, seq=2279848837, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.377: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), len 576, sending full packet
Mar 14 13:59:50.377: TCP src=445, dst=4150, seq=2279848837, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.377: IP: tableid=0, s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), routed via FIB
Mar 14 13:59:50.377: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), g=192.168.120.6, len 576, forward
Mar 14 13:59:50.377: TCP src=445, dst=4150, seq=2279849373, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.377: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), len 576, sending full packet
Mar 14 13:59:50.381: TCP src=445, dst=4150, seq=2279849373, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.381: IP: tableid=0, s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), routed via FIB
Mar 14 13:59:50.381: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), g=192.168.120.6, len 576, forward
Mar 14 13:59:50.381: TCP src=445, dst=4150, seq=2279849909, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.381: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), len 576, sending full packet
Mar 14 13:59:50.381: TCP src=445, dst=4150, seq=2279849909, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.381: IP: tableid=0, s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), routed via FIB
Mar 14 13:59:50.381: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), g=192.168.120.6, len 576, forward
Mar 14 13:59:50.381: TCP src=445, dst=4150, seq=2279850445, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.381: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), len 576, sending full packet
Mar 14 13:59:50.381: TCP src=445, dst=4150, seq=2279850445, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.381: IP: tableid=0, s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), routed via FIB
Mar 14 13:59:50.381: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), g=192.168.120.6, len 576, forward
Mar 14 13:59:50.381: TCP src=445, dst=4150, seq=2279850981, ack=2010463565, win=17124 ACK
Mar 14 13:59:50.381: IP: s=192.168.114.81 (Vlan4), d=192.168.120.6 (Vlan6), len 576, sending full packet
Mar 14 13:59:50.381: TCP src=445, dst=4150, seq=2279850981, ack=2010463565, win=17124 ACK
03-14-2007 06:15 AM
Hello,
Please use the linke below of troubleshooting the high CPU on cat6500.
http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a00804916e0.shtml#ios
http://www.cisco.com/warp/customer/63/highcpu_ip_input.html
HTH,Please rate if it does.
-amit singh
03-14-2007 08:35 PM
Hello amit singh
Thanks a lot, but I have already read all articles corresponding Higth CPU load due to IP INPUT. And reading these articles I found out that the issue is in IP INPUT process and I posted what I found.
I believe the problem is in host 192.168.120.6
But I don't understand why I see these packets (same src and dest port) in
What about log? Does it look good? 80% of 5 sec log filled with the same messages during debugging.
If I am right then how to solve the prob, if not just let me know, I'll read all those articles again carefully :-)
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