03-10-2008 03:58 AM - edited 03-05-2019 09:38 PM
hi,
ive a stack of 8 3750 Switches, since 2 weeks i have trouble with the CPU. he goes up to 99%.
when i restart the stack after 2-3 days he goes up again.
ip routing is about 50% cpu
--------------------------------------
CPU utilization for five seconds: 99%/28%; one minute: 88%; five minutes: 69%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
174 5042657 4383110 1150 44.81% 41.48% 32.67% 0 IP Input
117 336631 6621662 50 5.74% 3.91% 2.20% 0 Hulc LED Process
176 1529913 11173357 136 5.42% 4.16% 2.89% 0 Spanning Tree
65 290732 8241263 35 3.18% 2.79% 1.84% 0 HLFM address lea
51 229343 14774690 15 1.75% 0.99% 0.60% 0 Fifo Error Detec
156 737906 6332176 116 1.43% 1.53% 1.04% 0 LLDP Protocol
85 133749 441829 302 0.47% 0.40% 0.26% 0 hpm counter proc
86 829447 4169684 198 0.47% 0.38% 0.33% 0 HRPC pm-counters
126 1999665 887387 2253 0.47% 0.63% 0.68% 0 HRPC qos request
30 146123 173878 840 0.31% 0.09% 0.06% 0 Net Background
37 501722 61340 8179 0.31% 0.26% 0.20% 0 Compute load avg
9 589049 746053 789 0.15% 0.20% 0.22% 0 ARP Input
55 375259 1278169 293 0.15% 0.25% 0.18% 0 hrpc <- response
81 59753 2606018 22 0.15% 0.22% 0.15% 0 hpm main process
98 519 354 1466 0.15% 0.29% 0.11% 1 SSH Process
119 62384 774492 80 0.15% 0.02% 0.00% 0 HRPC hl3u reques
138 49777 277019 179 0.15% 0.31% 0.19% 0 PI MATM Aging Pr
211 14562 2897412 5 0.15% 0.03% 0.00% 0 MDFS RP process
239 42361 431344 98 0.15% 0.17% 0.11% 0 CEF: IPv4 proces
266 8141 279888 29 0.15% 0.03% 0.00% 0 IGMP Input
1 4525 83670 54 0.00% 0.00% 0.00% 0 Chunk Manager
--------------------------------------
show ip interfaces
Vlan<ID> is up, line protocol is up
Internet address is <IP-ADDRESS>/24
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1500 bytes
Helper addresses are <IP-ADDRESS>
<IP-ADDRESS>
Directed broadcast forwarding is disabled
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Local Proxy ARP is disabled
Security level is default
Split horizon is enabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
IP CEF switching is enabled
IP CEF switching turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is enabled
IP route-cache flags are Fast, CEF
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Probe proxy name replies are disabled
Policy routing is disabled
Network address translation is enabled, interface in domain outside
WCCP Redirect outbound is disabled
WCCP Redirect inbound is disabled
WCCP Redirect exclude is disabled
BGP Policy Mapping is disabled
Input features: NAT Outside
Output features: Post-routing NAT Outside
Cisco IOS Software, C3750 Software (C3750-IPBASEK9-M), Version 12.2(37)SE1, RELEASE SOFTWARE (fc1)
strange is, if i count all processes cpu %, this arent 100%. where is the rest of the cpu?
what can it be? i have no ideas...
thx...
03-10-2008 05:29 AM
"strange is, if i count all processes cpu %, this arent 100%. where is the rest of the cpu?"
When you add up process CPU percentages, they should be (about) the sum of the difference between total CPU and interrupt CPU. In your post: "CPU utilization for five seconds: 99%/28%; one minute: 88%; five minutes: 69%", 99% - 28% = 71%.
Of concern in your process CPU, is the amount for IP Input. See if anything in this link helps: http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a00801c2af3.shtml and for all software processes: http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a00801c2af6.shtml
03-10-2008 05:47 AM
Hi,
Are you seeing any errors in the logs? Capture the following outputs atleast 3-4 times a day:
-show log
-show proc mem
-show proc cpu
You might notice some pattern. Also, what was changed (IOS/traffic/config) on this switch or in the topology recently?
~Vaibhav
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