WS-C3850-24T-S CPU Specs?
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12-29-2015 06:08 AM - edited 03-05-2019 03:01 AM
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Other Routing
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12-29-2015 07:15 AM
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The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
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In no event shall Author be liable for any damages wha2tsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Switch processor specs might be difficult to obtain because it rarely has much to due with the switch's performance, and when it does, there's often an issue you would rather avoid. This because, data plane is normally handled by ASICs and control plane by the CPU.
Why do you need them and/or what specific CPU specs are you looking to obtain? Reason I ask, I'm trying to ascertain whether what and why you want to know might be answered otherwise.
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12-29-2015 07:25 AM
I ask because my WS-C3750G-24T-S has one processor and always floating around 90% utilization. I want to avoid that.
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12-29-2015 08:16 AM
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The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
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In no event shall Author be liable for any damages wha2tsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Ah, that may, or may not be a problem.
What's consuming the CPU?
Quite a few IOSs in the 3750s, will use a lot of CPU for Hulc LED process, but that normally doesn't impact performance. What IOS version are you using?
If, though, you have a high software forwarding CPU usage, that needs investigation.
For example, sometimes you can have a 3750 CPU problem caused by using the "wrong" SDM template.
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12-29-2015 08:20 AM
Thanks. How do I check what's consuming the CPU and how do I optimize it, hopefully without needing to pay for service license to upgrade firmware?
Pulling info from Observium:
Cisco 3750G (WS-C3750G-24T-S)
Cisco IOS 12.2(55)SE5 (IPSERVICESK9)
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12-29-2015 09:25 AM
sh proc cpu sorted
If you have maintenance contract, suggest updating to a later version of (55)SE (SE7..10 are very solid).
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12-29-2015 09:48 AM
I don't have a maintenance contract, but I'll look into how much they go for and what the differences/improvements are between 15x and my 12x versions.
I'm pasting only the processes with usage above 0.00%
CPU utilization for five seconds: 60%/27%; one minute: 63%; five minutes: 81%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
82 32821249 5347304 6137 3.50% 3.85% 6.61% 0 HLFM address lea
69 5248303 94630 55461 1.91% 1.46% 1.46% 0 Adjust Regions
315 6271531 364432 17209 1.43% 1.62% 1.65% 0 CEF: IPv4 proces
294 487 14 34785 1.43% 0.11% 0.02% 2 SSH Process
206 4579389 11455204 399 1.27% 0.98% 1.08% 0 IP Input
146 3167430 3990440 793 0.79% 0.75% 0.87% 0 HL3U bkgrd proce
145 2762801 5173044 534 0.63% 0.75% 0.85% 0 Hulc LED Process
211 1107050 2995345 369 0.47% 0.34% 0.33% 0 ADJ resolve proc
68 662441 10542470 62 0.31% 0.16% 0.20% 0 Fifo Error Detec
106 872849 373767 2335 0.15% 0.24% 0.25% 0 hpm counter proc
154 419086 51804 8089 0.15% 0.12% 0.11% 0 HQM Stack Proces
44 65126 74901 869 0.15% 0.03% 0.00% 0 HC Counter Timer
220 832572 401303 2074 0.15% 0.18% 0.21% 0 Spanning Tree
235 74989 360736 207 0.15% 0.01% 0.00% 0 TCP Timer
28 7529 251536 29 0.15% 0.01% 0.00% 0 GraphIt
107 73600 285454 257 0.15% 0.04% 0.00% 0 HRPC pm-counters
264 53591 2214891 24 0.15% 0.05% 0.01% 0 MDFS RP process
31 119336 33965 3513 0.15% 0.03% 0.00% 0 Net Background
262 87652 494102 177 0.15% 0.04% 0.00% 0 DHCPD Receive
I do have well over 10k IPs routed too, just to give you some insight. Not sure exact number, but well over 10k.
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12-29-2015 11:03 AM
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The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
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In no event shall Author be liable for any damages wha2tsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Unless you have need for 15.x features, recommend you stay with 12.2(55)SE - it's a very solid release, especially the last several patch releases.
10K routes - you might want check you TCAM utilization, see:
http://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/68461-high-cpu-utilization-cat3750.html#SDM
You might also want to review: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/troubleshooting/cpu_util.html#wp1028395
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12-29-2015 12:26 PM
Cisco3750#show platform tcam utilization
CAM Utilization for ASIC# 0 Max Used
Masks/Values Masks/values
Unicast mac addresses: 784/6272 757/5992
IPv4 IGMP groups + multicast routes: 152/1216 6/26
IPv4 unicast directly-connected routes: 784/6272 757/5992
IPv4 unicast indirectly-connected routes: 272/2176 77/556
IPv4 policy based routing aces: 0/0 0/0
IPv4 qos aces: 768/768 260/260
IPv4 security aces: 1024/1024 39/39
Note: Allocation of TCAM entries per feature uses
a complex algorithm. The above information is meant
to provide an abstract view of the current TCAM utilization
Cisco3750#show sdm prefer routing
"desktop routing" template:
The selected template optimizes the resources in
the switch to support this level of features for
8 routed interfaces and 1024 VLANs.
number of unicast mac addresses: 3K
number of IPv4 IGMP groups + multicast routes: 1K
number of IPv4 unicast routes: 11K
number of directly-connected IPv4 hosts: 3K
number of indirect IPv4 routes: 8K
number of IPv4 policy based routing aces: 0.5K
number of IPv4/MAC qos aces: 0.5K
number of IPv4/MAC security aces: 1K
Cisco3750#show processes cpu sorted 5sec
CPU utilization for five seconds: 71%/30%; one minute: 73%; five minutes: 84%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
297 478 13 36769 6.44% 0.51% 0.10% 3 SSH Process
82 33972245 5515061 6159 5.02% 5.74% 8.47% 0 HLFM address lea
322 8978872 3627822 2475 2.66% 2.53% 1.86% 0 SNMP ENGINE
315 6497835 376670 17250 1.57% 1.64% 1.64% 0 CEF: IPv4 proces
69 5455738 98258 55524 1.57% 1.46% 1.52% 0 Adjust Regions
288 486 13 37384 1.25% 0.10% 0.02% 1 SSH Process
206 4714523 11732768 401 1.25% 1.26% 1.38% 0 IP Input
145 2877795 5340068 538 1.25% 0.83% 0.77% 0 Hulc LED Process
72 993580 3127121 317 0.62% 0.22% 0.28% 0 hrpc <- response
106 906572 387005 2342 0.31% 0.20% 0.23% 0 hpm counter proc
146 3296177 4132574 797 0.31% 0.91% 0.98% 0 HL3U bkgrd proce
320 667892 2351095 284 0.31% 0.43% 0.24% 0 IP SNMP
236 52254 158319 330 0.15% 0.02% 0.00% 0 TCP Protocols
155 363878 213594 1703 0.15% 0.09% 0.09% 0 HRPC qos request
31 123611 35051 3526 0.15% 0.05% 0.01% 0 Net Background
71 100660 3162978 31 0.15% 0.01% 0.00% 0 hrpc -> request
68 692071 10868364 63 0.15% 0.15% 0.19% 0 Fifo Error Detec
154 434498 53664 8096 0.15% 0.08% 0.09% 0 HQM Stack Proces
84 128846 5516082 23 0.15% 0.06% 0.02% 0 HLFM address ret
20 7369 260640 28 0.00% 0.00% 0.00% 0 IPC Deferred Por
19 0 6 0 0.00% 0.00% 0.00% 0 IPC Managed Time
22 0 1 0 0.00% 0.00% 0.00% 0 IPC Session Serv
21 2452 36029 68 0.00% 0.00% 0.00% 0 IPC Seat Manager
18 8135 260639 31 0.00% 0.00% 0.00% 0 IPC Periodic Tim
Cisco3750#show controllers cpu-interface
ASIC Rxbiterr Rxunder Fwdctfix Txbuflos Rxbufloc Rxbufdrain
-------------------------------------------------------------------------
ASIC0 0 0 0 0 0 0
ASIC1 0 0 0 0 0 0
ASIC2 0 0 0 0 0 0
ASIC3 0 0 0 0 0 0
ASIC4 0 0 0 0 0 0
ASIC5 0 0 0 0 0 0
HOL Fix Counts
--------------
No Fixes: 0 Added: 172 In Use: 0 Both: 0
CPU Heartbeat Statistics
Tx Success Tx Fail 1st Thr 2nd Thr Unthr RetryCtMax
---------- ---------- ---------- ---------- ---------- ----------
5308098 0 0 0 0 1
Rx Delay
0 1 2 3 4
---------- ---------- ---------- ---------- ----------
5308098 0 0 0 0
AddlDelay AdvanceCnt
---------- ----------
0 0
Rx Retries by RetryCount
0 1 2 3 4 5 6
---------- ---------- ---------- ---------- ---------- ---------- ----------
5308098 0 0 0 0 0 0
7 8 9
---------- ---------- ----------
0 0 0
AddlRetry
----------
0
cpu-queue-frames retrieved dropped invalid hol-block stray
----------------- ---------- ---------- ---------- ---------- ----------
rpc 8590811 0 0 0 0
stp 4071 0 0 0 0
ipc 348656 0 0 0 0
routing protocol 956882 0 0 0 0
L2 protocol 17178 0 0 0 0
remote console 0 0 0 0 0
sw forwarding 513680680 0 0 0 0
host 18234719 0 0 0 0
broadcast 96238 0 0 0 0
cbt-to-spt 0 0 0 0 0
igmp snooping 593841 0 0 0 0
icmp 517823747 0 0 172 0
logging 0 0 0 0 0
rpf-fail 0 0 0 0 0
dstats 0 0 0 0 0
cpu heartbeat 5308098 0 0 0 0
cpu-queue static inuse static added
----------------- ------------ ------------
rpc 0 0
stp 0 0
ipc 0 0
routing protocol 0 0
L2 protocol 0 0
remote console 0 0
sw forwarding 0 0
host 0 0
broadcast 0 0
cbt-to-spt 0 0
igmp snooping 0 0
icmp 0 172
logging 0 0
rpf-fail 0 0
dstats 0 0
cpu heartbeat 0 0
Supervisor ASIC receive-queue parameters
----------------------------------------
queue 0 maxrecevsize 7E0 pakhead 4749478 paktail 5623C50
queue 1 maxrecevsize 7E0 pakhead 483582C paktail 57A15E8
queue 2 maxrecevsize 7E0 pakhead 47E71E8 paktail 47E6E4C
queue 3 maxrecevsize 7E0 pakhead 58FAD4C paktail 58FA614
queue 4 maxrecevsize 7E0 pakhead 483A8D8 paktail 57A6C88
queue 5 maxrecevsize 7E0 pakhead 4ADF734 paktail 58DF300
queue 6 maxrecevsize 7E0 pakhead 58E88F0 paktail 58E8554
queue 7 maxrecevsize 7E0 pakhead 5882820 paktail 4A9F450
queue 8 maxrecevsize 7E0 pakhead 4AA7EBC paktail 4AA6CB0
queue 9 maxrecevsize 7E0 pakhead 57E9814 paktail 57E9814
queue A maxrecevsize 7E0 pakhead 498247C paktail 49832EC
queue B maxrecevsize 7E0 pakhead 5905498 paktail 5904D60
queue C maxrecevsize 7E0 pakhead 49A3354 paktail 57F99D4
queue D maxrecevsize 7E0 pakhead 499ACBC paktail 57E9478
queue E maxrecevsize 0 pakhead 0 paktail 0
queue F maxrecevsize 7E0 pakhead 57D6008 paktail 497DCD0
Supervisor ASIC exception status
--------------------------------
Receive overrun 00000000 Transmit overrun 00000000
FrameSignatureErr 00000000 MicInitialize 00000000
BadFrameErr 00000000 LenExceededErr 00000000
BadJumboSegments 00000000
Supervisor ASIC Mic Registers
------------------------------
MicDirectPollInfo 80000200
MicIndicationsReceived 00000000
MicInterruptsReceived 00000000
MicPcsInfo 0000011F
MicPlbMasterConfiguration 00000000
MicRxFifosAvailable 00000040
MicRxFifosReady 0000BFBF
MicTimeOutPeriod: FrameTOPeriod: 00000EA6 DirectTOPeriod: 00004000
MicTransmFramesCopied 00000003
MicTxFifosAvailable 0000003F
MicConfiguration: Conf flag: 00000110 Interrupt Flag: 0000000A
MicReceiveFifoAssignmen Queue 0 - 7: 00000000 Queue 8 - 15:00000000
MicReceiveFramesReady: FrameAvailable: 00000841 frameAvaiMask: 00000000
MicException:
Exception_flag 00000000
Message-1 00000000
Message-2 00000000
Message-3 00000000
MicIntRxFifo:
ReadPtr 000001A8 WritePtr 000001A8
WHeadPtr 000001A8 TxFifoDepth C0000800
MicIntTxFifo:
ReadPtr 00000480 WritePtr 00000480
WHeadPtr 00000480 TxFifoDepth C0000800
MicDecodeInfo:
Fifo0: address: 03FF4000 asic_num: 00000100
Fifo1: address: 03FF4400 asic_num: 00000101
MicTransmitFifoInfo:
Fifo0: StartPtrs: 066C9000 ReadPtr: 066C9110
WritePtrs: 066C9110 Fifo_Flag: 8A800800
Weights: 001E001E
Fifo1: StartPtrs: 06427400 ReadPtr: 06427608
WritePtrs: 06427608 Fifo_Flag: 89800400
Weights: 000A000A
MicReceiveFifoInfo:
Fifo0: StartPtr: 066DD000 ReadPtr: 066DD678
WritePtrs: 066DD6D8 Fifo_Flag: 8B000FA0
writeHeaderPtr: 066DD6D8
Fifo1: StartPtr: 069DA800 ReadPtr: 069DAB38
WritePtrs: 069DAB38 Fifo_Flag: 89800400
writeHeaderPtr: 069DAB38
Fifo2: StartPtr: 06993000 ReadPtr: 06993008
WritePtrs: 06993008 Fifo_Flag: 89800400
writeHeaderPtr: 06993008
Fifo3: StartPtr: 06BEF800 ReadPtr: 06BEF800
WritePtrs: 06BEF800 Fifo_Flag: 89800400
writeHeaderPtr: 06BEF800
Fifo4: StartPtr: 06A22000 ReadPtr: 06A220D8
WritePtrs: 06A220D8 Fifo_Flag: 89800400
writeHeaderPtr: 06A220D8
Fifo5: StartPtr: 06B5EE00 ReadPtr: 06B5EE00
WritePtrs: 06B5EE00 Fifo_Flag: 88800200
writeHeaderPtr: 06B5EE00
Fifo6: StartPtr: 06BA5C00 ReadPtr: 06BA5D38
WritePtrs: 06BA5D38 Fifo_Flag: 89400000
writeHeaderPtr: 06BA5D38
Fifo7: StartPtr: 06ACE800 ReadPtr: 06ACE930
WritePtrs: 06ACE930 Fifo_Flag: 89800400
writeHeaderPtr: 06ACE930
Fifo8: StartPtr: 06B38E00 ReadPtr: 06B38F88
WritePtrs: 06B38F88 Fifo_Flag: 88800200
writeHeaderPtr: 06B38F88
Fifo9: StartPtr: 066DB4D8 ReadPtr: 066DB4D8
WritePtrs: 066DB4D8 Fifo_Flag: 82800008
writeHeaderPtr: 066DB4D8
Fifo10: StartPtr: 06A6B800 ReadPtr: 06A6B880
WritePtrs: 06A6B880 Fifo_Flag: 88800200
writeHeaderPtr: 06A6B880
Fifo11: StartPtr: 066C8F00 ReadPtr: 066C8F20
WritePtrs: 066C8F60 Fifo_Flag: 86000040
writeHeaderPtr: 066C8F60
Fifo12: StartPtr: 06A98800 ReadPtr: 06A98B00
WritePtrs: 06A98800 Fifo_Flag: 89000100
writeHeaderPtr: 06A98800
Fifo13: StartPtr: 06427880 ReadPtr: 06427880
WritePtrs: 06427880 Fifo_Flag: 86800080
writeHeaderPtr: 06427880
Fifo14: StartPtr: 00000000 ReadPtr: 00000000
WritePtrs: 00000000 Fifo_Flag: 00800000
writeHeaderPtr: 00000000
Fifo15: StartPtr: 06992F80 ReadPtr: 06992F90
WritePtrs: 06992F90 Fifo_Flag: 84800020
writeHeaderPtr: 06992F90
===========================================================
Complete Board Id:0x4003
===========================================================
I would appreciate any help you can offer to optimize the CPU and IOS in general. Thank you.
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12-30-2015 01:51 AM
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The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
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In no event shall Author be liable for any damages wha2tsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
"I would appreciate any help you can offer to optimize the CPU and IOS in general."
I don't believe I can add much more than what's contained in the Cisco links I provided.
From your stats, two of your TCAM resources are pretty full, which makes me wonder whether they do, on occasion, overflow.
Your CPU stats also make me wonder if the switch is doing too much software forwarding.
Back to your original question, I would presume a 3850 has a faster CPU, and perhaps more TCAM resources, as its newer, so it might "behave" better.
