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Community Member

Hulc LED Process

Hi All,..

I saw in my switch there is a hig processor CPU in PID 110, could you please advice me what it is? and how to solve this?

Device type : WS-C3560G-48PS

-----------------------------------------

Switch#sh proc cpu sor

CPU utilization for five seconds: 23%/0%; one minute: 22%; five minutes: 21%

PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process

110 11990607 1436516 8347 15.97% 15.83% 15.84% 0 Hulc LED Process

-----------------------------------------

Thanks

33 REPLIES

Re: Hulc LED Process

Hulc LED Process is a process responsible for link status detection.

If there is SFP port in use, it might be a little bit high.

You can check if you hit the following bug.

CSCsi78581 Hulc LED Process uses 10-15% CPU on Catalyst 3750/3560.

Community Member

Re: Hulc LED Process

Hi,

We have a similar problem on a 2960 with SFP ports.

Is this bug only related to 3750/3560 or also to 2960 ? I can't find a bug on the bug toolkit...

Our CPU is running around 25 - 30 % so we would like to decrease it if possible.

Do you know a workaround ?

gr

Re: Hulc LED Process

That bug is not related to 2960.

I tested 2960 in the lab. If it is 2960 with PoE, Hulc LED process will use about 15% CPU.

In general, it is normal for 2960 to have cpu usage around 15-40%.

If you don't have any performance issue, you can ignore this.

Hall of Fame Super Gold

Re: Hulc LED Process

CSCsi78581 lists this fixed in in 12.2(44)SE only, when it will be fixed in other newer versions ?

I have it on 48 ports 2960 thta can ony run 12.2(50) and higher.

Hall of Fame Super Gold

Re: Hulc LED Process

On one of the 2960-48 that suffer this, I've loaded for a try 12.2(52)SE

Hulc LED remained the same, but general CPU utilli went up actually with "REP LSL" ?!?.

CPU utilization for five seconds: 34%/0%; one minute: 30%; five minutes: 29%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
114     9582762   1518651       6310 15.65% 15.40% 15.50%   0 Hulc LED Process

96        1834       108      16981  5.11%  0.41%  0.08%   1 SSH Process
238      192955     73776       2615  3.35%  0.63%  0.40%   0 SNMP ENGINE
236       78907    133133        592  2.07%  0.31%  0.17%   0 IP SNMP
183     4008328 164163844         24  1.27%  7.01%  7.28%   0 REP LSL Hello PP

Can't Cisco fix this ?

Community Member

Re: Hulc LED Process

disable not-connected ports and you'll see a drop in the cpu usage for this process

Community Member

Hulc LED Process

I shut down the SPF ports not in use and saw CPU drop by a minimum of 20% on all of my 2960S-POE switches:

Community Member

Hulc LED Process

Then it came right back up to %60

Hall of Fame Super Gold

Hulc LED Process

Upgrade to either 12.2(55)SE3 or 12.2(58)SE1.

Community Member

Hulc LED Process

Hi,

After disable two SFP ports in 2960 the "Hulc LED process" dropped to 6.23%. Before it was 15.65%!!

leolaohoo,

    

     This IOS (58) isn't consuming a lot of memory?

Hall of Fame Super Gold

Hulc LED Process

I've got news for you George, STAY AWAY from IOS level 15.0.  Across the board, it's got a memory leak issue WITHOUT any configs.

I'm currently using 12.2(58)SE1 and I have no issue. 

Community Member

Hulc LED Process

Hi,

i've got the same problem. We have two 3560x 48P running IOS 12.2(58)SE2 and the HULC LED process takes over 15% cpu load.

For what this process is responsable?

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    7766663333344444888889999922222555557777700000999988888888

100

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50                                *****

40 ******          ******************************************

30 **********************************************************

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10 **********************************************************

   0....5....1....1....2....2....3....3....4....4....5....5....

             0    5    0    5    0    5    0    5    0    5

               CPU% per second (last 60 seconds)

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             0    5    0    5    0    5    0    5    0    5

               CPU% per minute (last 60 minutes)

              * = maximum CPU%   # = average CPU%

     1       1                 1     1111                       1

    7068757780566565576559785560556660000566555666976756656774670765667657

    3032391000910845988349359340222180000048268309429544494069810073970443

100  *       *           *     *     ****                       *

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             0    5    0    5    0    5    0    5    0    5    0    5    0

                   CPU% per hour (last 72 hours)

                  * = maximum CPU%   # = average CPU%

3560-x#sh processes cpu sorted 5min

CPU utilization for five seconds: 35%/0%; one minute: 35%; five minutes: 38%

PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

129  1769580351 396248960       4465 15.97% 15.39% 14.11%   0 Hulc LED Process

  60  1017745522 191907631       5303  8.62%  7.60%  7.13%   0 RedEarth Tx Mana

211  1379704348  90033624      15324  0.15%  1.23%  5.45%   0 REP LSL Hello PP

  59   266213943 266690463        998  2.23%  1.93%  1.92%   0 RedEarth I2C dri

  97   394926822  33075411      11940  1.59%  1.55%  1.54%   0 hpm counter proc

Community Member

Hulc LED Process

I have the same issue as ssch1ndler does; exact same code revision but my usage for this particular process sits at 20% even after turning off the 4 gi1/1 - 4 ports.

Anyone know if a newer version of the code has fixed this high cpu process?

Thank you

Hall of Fame Super Gold

Re: Hulc LED Process

I have fought this matter with the TAC for quite a long time, they were adamant:

no fix is possible (hard to believe, I know) and one has to keep it as it is.

Community Member

Cisco Team,I have facing HULC

Cisco Team,

I have facing HULC LED process cpu high utilization on Cisco 3560 device

Kindly see this issue Coz We have a lot of 3560 devices .

 

CPU utilization for five seconds: 45%/27%; one minute: 77%; five minutes: 81%
 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
 112    92636289  11819413       7837 10.22% 12.50% 12.82%   0 Hulc LED Process
 162         572       149       3838  0.79%  0.47%  0.12%   1 SSH Process
  34      243793      9957      24484  0.63%  0.06%  0.01%   0 Per-minute Jobs
   4      759941     69775      10891  0.47%  0.08%  0.06%   0 Check heaps
 167      908721   2401823        378  0.31%  0.25%  0.17%   0 IP Input
  49      108374  27272839          3  0.15%  0.03%  0.00%   0 Fifo Error Detec
  82     2985986    581464       5135  0.15%  0.17%  0.24%   0 hpm counter proc
  21       59657    581607        102  0.15%  0.02%  0.00%   0 IPC Deferred Por
 121      113837    235117        484  0.15%  0.02%  0.00%   0 HRPC qos request
 120      929926    117568       7909  0.15%  0.13%  0.12%   0 HQM Stack Proces
  10           0         1          0  0.00%  0.00%  0.00%   0 CEF MIB API
   9      677969   2742900        247  0.00%  0.09%  0.09%   0 ARP Input
   8           0         1          0  0.00%  0.00%  0.00%   0 Crash writer
  11           0         2          0  0.00%  0.00%  0.00%   0 AAA_SERVER_DEADT
  12           0         2          0  0.00%  0.00%  0.00%   0 AAA high-capacit
   7        2729     68702         39  0.00%  0.00%  0.00%   0 Net Input
  17          25      9815          2  0.00%  0.00%  0.00%   0 IPC Dynamic Cach
  18           0         1          0  0.00%  0.00%  0.00%   0 IPC Zone Manager
   6           0         2          0  0.00%  0.00%  0.00%   0 Timers
  13           0         1          0  0.00%  0.00%  0.00%   0 Policy Manager
  14          16         5       3200  0.00%  0.00%  0.00%   0 Entity MIB API

Hall of Fame Super Gold

Read my answer above:I have

Read my answer above:

I have fought this matter with the TAC for quite a long time, they were adamant:

no fix is possible (hard to believe, I know) and one has to keep it as it is.

Community Member

Hi,I have few 2960XR-48FPD-I

Hi,

I have few 2960XR-48FPD-I switch which is also facing high HULC LED process.

roughly about 26% all the time.

Running on version 15.0(2)EX5

So i just want to confirm there is no known fix version?

Will it cause any performance issue?

Thanks.

Hall of Fame Super Gold

This thread is about older

This thread is about older models. Since your is much newer, you should try opening a case anyway to see what is Cisco response.

Community Member

Hi Paolo  did you find any

Hi Paolo

  did you find any solution for this.?

Thanks

 

Community Member

We use the WS-C2960S-48FPD-L

We use the WS-C2960S-48FPD-L Model and I just noticed the following bug was recently posted by Cisco regarding the Hulc LED Process and High CPU usage:

https://quickview.cloudapps.cisco.com/quickview/bug/CSCtg86211

Community Member

Hi , i have this issue now

Hi , i have this issue now with C2960S-UNIVERSALK9-M), c2960s-universalk9-mz.150-2.SE4

support team opened TAC with cisco and recommended to upgrade to 15.0(2)SE8

 

problem is i can only upgrade to 15.0(2)SE6 >>> do you know if this version will fix the issue ?

I had the same issue with

I had the same issue with 3750stack with IOS 15.0(2)SE5.  But the bug CSCsi78581  does not hit with this IOS. Do you know if there is another bug for 15.x?

Hall of Fame Super Gold

The fact that the version

The fact that the version list for the bug doesn't include your version does not mean is not there, as your report demonstrate.

Hall of Fame Super Gold

Hey Paolo! You're back!  Hope

Hey Paolo!

 

You're back!  Hope you're doing well.  Some of us have been wondering what ever happened to you.

Hall of Fame Super Gold

Thanks Leo..  Just took time

Thanks Leo..  Just took time off.

Hall of Fame Super Gold

I had the same issue with

I had the same issue with 3750stack with IOS 15.0(2)SE5.  But the bug CSCsi78581  does not hit with this IOS. Do you know if there is another bug for 15.x?

The most stable IOS for the 3560/3750 series of switches has always been 12.2(55)SE-train.  Try 12.2(55)SE10.  Any other IOS version is just plain garbage.

Community Member

Hi Leo,

Hi Leo,

I got high cpu utilization for a long time on the same switch which is running C2960 Software (C2960-LANBASEK9-M), Version 15.0(2)SE6

I need to run the same 15.x IOs.

can you please suggest the IOS which is not affected by bug CSCsi78581.

SW5#show processes cpu | ex 0.00
CPU utilization for five seconds: 82%/33%; one minute: 82%; five minutes: 87%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
45 9315208 52503688 177 1.75% 1.45% 1.51% 0 Net Input
53 6268876 386239552 16 0.47% 0.12% 0.10% 0 DownWhenLooped
69 12859754 187938145 68 0.15% 0.07% 0.11% 0 RedEarth Tx Mana
74 67204962 956595118 70 0.63% 0.43% 0.36% 0 Fifo Error Detec
105 16480672 20214830 815 0.31% 0.37% 0.36% 0 hpm counter proc
133 83973414 504307953 166 32.90% 33.47% 33.88% 0 Hulc LED Process
142 33521049 4039068 8299 0.31% 0.17% 0.16% 0 HQM Stack Proces
165 9395187 201949573 46 0.79% 0.30% 0.30% 0 UDLD
183 385 229 1681 0.15% 0.01% 0.01% 1 Virtual Exec
201 29114634 35845034 812 0.15% 0.16% 0.15% 0 Spanning Tree
223 41728709 42681366 977 4.15% 4.05% 4.80% 0 IGMPSN
230 32514585 44302472 733 0.47% 0.46% 0.60% 0 Marvell wk-a Pow

SW5#show version
Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 15.0(2)SE6, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Wed 09-Apr-14 03:40 by prod_rel_team

ROM: Bootstrap program is C2960 boot loader
BOOTLDR: C2960 Boot Loader (C2960-HBOOT-M) Version 15.0(2r)EZ1, RELEASE SOFTWARE (fc2)

LPTRIST07S005 uptime is 33 weeks, 2 days, 23 hours, 17 minutes
System returned to ROM by power-on

Thanks in advance

Community Member

Hulc LED Process

I have the same issue

Community Member

Hulc LED Process

I have the same issue. Costs us hundreds of man hours.

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