How to check flows crossing an FC link

bruno.fernandes · ‎09-10-2013

Hi Guys,

I have to small fabrics (A and B), each one composed of two 9148, and each pair of 9148 is connected over the WAN over a trunk, for several times during the day both this links (one for fabric A and the other for fabric B) are having near 100% utilization for almost 1hour, during this time I need to check what are the flows using the link...if this was IP I would be using Netflow...Is there any Way I can check this ? Since for now I only have DCNM monitoring the link's and I only have utilization......but I need what flow is causing this .... I'm havin Synchronous replication over this links and I'm suspecting this is the cause of the problem.

Kind regards,

Bruno Fernandes

dakester · ‎09-10-2013

Hi Bruno,

You can use DCNM-SAN to configure FC-FLOWs on the switch for the source/destination pairs using the ISL and monitor using the DCNM Server.

The below link is old, but may help.

See page 2-8 (adobe page 78 of 272) Performance Manager Using Fabric Manager Server (DCNM)
http://www.cisco.com/en/US/docs/storage/san_switches/mds9000/sw/rel_3_x/cookbook/MDScookbook31.pdf

Viewing Flows (DCNM)
http://www.cisco.com/en/US/docs/switches/datacenter/sw/6_x/dcnm/fundamentals/guide/dcnm/DCNM-SAN-LAN_published/wc.html#wp1339794

Regards,

David

bruno.fernandes · ‎09-11-2013

Hi David,

Yes but this requires me to define what flows I wan't to anallyze, I was looking more for something like point to a specific ISL and from there discover what flows are using that ISL, utilization byt flow....

Thank's for your help,

Kind regards,

Bruno Fernandes

andlevin · ‎12-24-2013

Will look into this requirement. Meantime we made enhancements to fc flows based on traffic in DCNM 6.2(3)

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