Mailing List Archive: nsp: extreme

Extreme Switch CPU utilization on port-mirroring ?

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hamidahmed77 at yahoo

Aug 11, 2007, 9:03 AM

Post #1 of 2 (2484 views)
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Extreme Switch CPU utilization on port-mirroring ?

Hi,

I have an extreme switch Summit 400-24p. I am running port-mirroring for two ports on tthe switch. I need to check what impact does it make on the CPU when i run port mirroring for a said number of ports?

The show version output is as follows:
-----------------------------------------------------------------------------------------------------
Extreme switch:32 # show version
System Serial Number:
CPU board: 8S40524P3A1 P12236889 CP1: 4 CP2: 06
Image : Extremeware Version 7.5e.2.8 [non-ssh] by Release_Master on 03/08/06 03:53:37
BootROM : 5.1
-----------------------------------------------------------------------------------------------------

Also when i run "top" command the output is as follows:
--------------------------------------------------------------------------------------
top
Total number of tasks: 72
Task Name Task Id Task PC Status % CPU Max % util
===================================================
Press 'h' for help
tBGTask 0b49fcf8 00b40a24 READY 99 99
tExcTask 0effdeb8 00b4daa4 PEND 0 0
tLogTask 0effb530 00b4daa4 PEND 0 0
tShell 0efe8e18 00b0e150 SUSPEND 0 0
bcmDPC 0ee18de0 00b3c51c PEND 0 0
bcmCNTR.0 0ecf32a0 00b3c51c PEND+T 0 0
bcmTX 0ecd0ce8 00b3c51c PEND 0 0
bcmCNTR.1 0e8d9150 00b3c51c PEND+T 0 0
bcmCNTR.2 0e88bd28 00b3c51c PEND+T 0 0
tSlowTimer 0e27f060 00b4daa4 PEND 0 1
tFastTimer 0e24ce48 00b4daa4 PEND 0 0
tTimeout 0e2a1288 00b4daa4 PEND 0 0
tEMSOutput 0e28b078 00b4daa4 PEND 0 0
tEMSFilter 0e288e60 00b4daa4 PEND+T 0 0
tledPollTa 0e285b70 00b4daa4 PEND 0 1
tFdbAgeTas 0df0ada8 00b4daa4 PEND 0 0
tFdbMacLoc 0df063d8 00b4daa4 PEND 0 0
tipFdbAgeT 0df01ad0 00b4daa4 PEND 0 0
tipsubFdbA 0defd1c8 00b4daa4 PEND 0 0
tFdbSyncTa 0def8f88 00b3ffa4 SUSPEND 0
--------------------------------------------------------------------------------------

Can some one point out how can i find cpu statistics on the extreme summit switch when we run port-mirroring ? And also how much load does port-mirroring make on the switch? Is there any forecasting or dimensioning done for this ?

regards,
HA

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Stephane.Grosjean at telindus

Aug 22, 2007, 8:08 AM

Post #2 of 2 (2168 views)
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Extreme Switch CPU utilization on port-mirroring ? [In reply to]

>That's the theory, not the practice. In practice all sorts of things
>bring your CPU up to 100%. I have a dozen different bugs about this
>open with Extreme, even against direct claims made in their product
>documentation, and they have demonstrated no desire to fix them.

Hi Jo,

Well, it seems Extreme is not really very active with EOS anymore, this is the slow path for this code nowadays. Their attention seems more about XOS which is more promising.

To my experience, I "only" had to deplore some series of BD6800 chassis which seems to refuse to work properly... a bad serie I guess, but I know some customers having them. I'm running some Extreme boxes in various customers network (ISP or not) without more problem than other brands.

Regards,

Stephane.

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