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BashedRoot
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WS-C3850-24T-S CPU Specs?

Anyone know the processor specs on WS-C3850-24T-S? Their page says nothing. Their live chat never works. I can't even email them, This page - clicking "email us" bottom left redirects to this page. What a mess of a website

9 REPLIES 9
Joseph W. Doherty
Hall of Fame Expert

Disclaimer

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.

Liability Disclaimer

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.

I ask because my WS-C3750G-24T-S has one processor and always floating around 90% utilization. I want to avoid that.

Disclaimer

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.

Liability Disclaimer

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.

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)

sh proc cpu sorted

If you have maintenance contract, suggest updating to a later version of (55)SE (SE7..10 are very solid).

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.

Disclaimer

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.

Liability Disclaimer

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

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.

Disclaimer

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.

Liability Disclaimer

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.