Fibre Channel (SAN)

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New Contributor
Posts: 3
Registered: ‎06-21-2012

Question about Utilization of FC switch ports.

I’m trying  to find
the utilization of FC ports using snmpwalk.

After finding the information I see is ports are using  more than 8gb.

Whereas physical ports speed is 8Gb. Looks like I’m missing
something.

Can someone help me what I’m missing?

Using following command to get data out.

snmpwalk -v 2c -c public  hostname  1.3.6.1.4.1.1588.2.1.1.1.6.2.1.11

SNMPv2-SMI::enterprises.1588.2.1.1.1.6.2.1.11.2 = Counter32: 2292858969

SNMPv2-SMI::enterprises.1588.2.1.1.1.6.2.1.11.3 = Counter32:
1453314616

SNMPv2-SMI::enterprises.1588.2.1.1.1.6.2.1.11.4 = Counter32:
4019564503

SNMPv2-SMI::enterprises.1588.2.1.1.1.6.2.1.11.5 = Counter32:
671785171

SNMPv2-SMI::enterprises.1588.2.1.1.1.6.2.1.11.6 = Counter32:
2284861517

SNMPv2-SMI::enterprises.1588.2.1.1.1.6.2.1.11.7 = Counter32:
12160138

If I do the math ( 2292858969*4 )/ 1073741824 = 8.5Gb

Multiply  counter with
4( word) , then converted  bytes to  gigabytes.

If I look at port utilization in Brocade  GUI (performance utilization GUI) ,  it is hardly 64.5kb-8G..

Not sure what I’m missing here. Can you please help me. Attaching the switch GUI windows also, for your references

Thank you for the help

BK

External Moderator
Posts: 4,907
Registered: ‎02-23-2004

Re: Question about Utilization of FC switch ports.

--->>>.....I see is ports are using  more than 8gb.

Fibre Channel use other Data Rate as Ethernet.

e.g. show here for details

http://www.avagotech.com/pages/en/fiber_optics/storage/8g_fibre_channel/

TechHelp24
New Contributor
Posts: 3
Registered: ‎06-21-2012

Re: Question about Utilization of FC switch ports.

  I’m sorry can you please explain in detail.

thanks

BK

Super Contributor
Posts: 635
Registered: ‎04-12-2010

Re: Question about Utilization of FC switch ports.

Hello BK,

the MIB manual tell me following: "Counts the number of Fibre Channel words that the port has transmitted."

This means for my understanding that 8.5GB have been transmitted since the last reset or counter overflow.

There is no indication if the port has done this is 1 second or 1 hour or 1 year.

I hope this helps.

Regards,

Andreas

New Contributor
Posts: 3
Registered: ‎06-21-2012

Re: Question about Utilization of FC switch ports.

What is best method to find the utilization then?

thanks

Super Contributor
Posts: 635
Registered: ‎04-12-2010

Re: Question about Utilization of FC switch ports.

You can use BNA from Brocade, Cacti, MRTG or Nagios to monitor port utilization. There are many other tools on the internet to do this task.

It depends primary on your demand which tool fits best.

All freeware solutions will take some time to get them up and running.

Regards,

Andreas

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