Hi,

I understand there is a maximum of 8 ports per ISL trunk. I read there is maximum of number of ISL trunk we can have per SAN switch.  Where can I find this maximum of ISL trunk in a switch?  The specs of my model (SAN128B-6) of switch doesn't show this maximum.  My big question is to know if I will be able to create 4 ISL trunks with 8 ports per trunk?  I am still not sure if I will use 8 ports per trunk. 

Thanks

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Bernard Fay
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Hello Bernard,

according to FOS Scalability guide, there is no limit of ISLs per switch, the limit is your port count.

Thanks Sergei! 

I didn't know about this document.  It clears up the subject for me. 

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Bernard Fay
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For SAN128B-6 I prefer to use Q Flex Ports for trunks. port grouping is important for the trunks. 

here's the port groups on your san128b-6

 https://techdocs.broadcom.com/us/en/fibre-channel-networking/fabric-os/fabric-os-administration/9-2-x/v26799888/v26800033/v26799817.html

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Nezih Boyacioglu
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I understand and agree with you about Q-Flex ports for trunks. But we cannot use those ports as we don't have licenses for them.

Thanks for the information. 

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Bernard Fay
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