Fibre Channel (SAN)

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Occasional Contributor
Posts: 19
Registered: ‎09-06-2010

Mix of WWN and Port Zoning

Hi,

are there any concerns to mix port and WWN zoning in a Fabric in general? In detail the Fabric contains Brocade 5300 switches and Cisco UCS 6120XP switches. NPIV is also used and needed with maximum allowed WWNs of 255.

Regards,

dedalus

Valued Contributor
Posts: 931
Registered: ‎12-30-2009

Re: Mix of WWN and Port Zoning

No not really.

However I would go for WWN based zones in your situation as you're using NPIV.

Occasional Contributor
Posts: 19
Registered: ‎09-06-2010

Re: Mix of WWN and Port Zoning

Hi  dion.v.d.c,

well at the ports where the Cisco switch is plugged in, we wanted to use Port Zoning. The Zone based on Port Zoning contains in the config file 7 lines. If using WWN Zoning the config file gets filled up with at least 510 lines as there are at maximum 510 different WWPNs directing their traffic to that port. For us it seems more easier to manage that challenge with Port Zoning.

The only question was: Is there a lack of functionality if mixing it this kind of.

Regards,

dedalus

Valued Contributor
Posts: 931
Registered: ‎12-30-2009

Re: Mix of WWN and Port Zoning

I understand your predicament, but if you where to zone that one port (with those 500+ NPIV wwn's hanging of it) all wwn's are able to see all and everything.

I would not want to know what that does with crosstalk, chatter and rscn should one of your node reboot or misbehave.

Work it'll most probably will, but when it doesn't you'll have an hard time troubleshooting and correcting to issues.

Brocadian
Posts: 3
Registered: ‎08-13-2009

Re: Mix of WWN and Port Zoning

dedalus,

The quick answer to your question regarding lack or loss of functionality is; No. The enforcement mechanism used in a mixed zoning configuration will be session based instead of frame based enforcement. Read Brocade's Zoning Best Practices whitepaper for a more in-depth explanation.

Excerpt:

Frame-based hardware enforcement occurs in the following cases on a per-zone basis:

  • All zone members in a configuration use pWWN identification
  • All zone members in a configuration use D,P identification
  • Zones use either pWWN or D,P per zone with no mixed or overlapping zones

Session-based hardware enforcement occurs in the following cases on a per-zone basis:
     

  • A mixed zone with both pWWN and D,P members
  • Any overlapping zones

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