Ethernet Fabric (VDX, CNA)

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pstl-mod.administrators
Posts: 2
Registered: ‎12-20-2012

Trunking and Licenses with VDX 6720 Device

We have purchased 2 Brocade VDX 6720 Switches. I have been told that in order to create a trunk  between these 2 switches or between these switches and other switches we have - we need to purchase seperate licenses for trunking. Is this a true statement? And if so, what are the details of the software I need to purchase?

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Mike Eversole
Posts: 367
Registered: ‎04-08-2009

Re: Trunking and Licenses with VDX 6720 Device

My apologies for the delay pstl-mod.administrators.  To answer your question, no you are not required to purchase a license to form a trunk group.  VDX Switches support automatic ISL formation and hardware-based trunking. When a switch joins an Ethernet fabric, ISLs automatically form between directly connected switches within the fabric. If more than one ISL exists between two switches, then Brocade ISL trunks can automatically form. All ISLs connected to the same neighboring Brocade switch attempt to form a trunk. The trunks are formed only when the ports belong to the same port group. No user intervention is necessary to form these trunks.

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sysadmin27
Posts: 1
Registered: ‎02-25-2013

Re: Trunking and Licenses with VDX 6720 Device

The port group part--only relevant if you have more than one cable between units?


If you have three VDX switches and they plug into each other with one cable, like a triangle, does the port group matter?

Community Manager
Mike Eversole
Posts: 367
Registered: ‎04-08-2009

Re: Trunking and Licenses with VDX 6720 Device

Q:  "The port group part--only relevant if you have more than one cable between units?"

A:  Correct.

Q:  "If you have three VDX switches and they plug into each other with one cable, like a triangle, does the port group matter?"

A:  In this scenario, it does not matter.

All ISL ports connected to the same neighbor Brocade switch are attempted to form a trunk. For a successful trunk formation, all ports on the local switch must be part of the same port group and must be configured at the same speed. Rules for these trunks are similar to trunks on Brocade FC switches: eight ports are allowed per trunk group and the trunk is turned on by default.

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