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Control Network on Primary and Secondary Dante Switches

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Benjamin Krumholz:
Hey All,

Heres the situation.. I am talking about only control network here NOT DANTE.. Simplified setup..

One control computer (HiQ net, Yamaha control).
Two SG300 Switches Switch 1= PRIMARY  Switch2= secondary.. ( Switches are programmed as Yamaha suggests( VLAN 1 = Control, Vlan2=Dante, Fiber ports are TRUNKED)
Connected to, Another Two Cisco Switches..
One network amplifier or console.. ( Control only not talking DANTE or any digital audio)

So i connect Computer to VLAN 1 of the primary switch and Amplifier to VLAN 1 of the other primary switch... What happens when I lose the link between the Primary switchs? Do i have to move both the computer and Amplifier to the secondary switch?

My question is, Can I loop VLAN 1 on both the Primary and Secondary Switches?? I get that I can use a secondary network adapter to connect to the secondary switch, but what do i do on the amp/console end?
Can i put a switch infront of the amp/ console and send the signal into Both Primary and secondary switches? Will this Freak out the network?

Thanks,
Ben

Rob Spence:
I canít answer the technical question you have but, productions that need secondary networks, in general, in my opinion, also have gear that will connect to both primary and secondary networks.

Analyze what the impact to you is in the event of a failure. In your case, you would loose control, but not necessarily audio if the audio path is via Dante and all the Dante enabled audio devices support primarily and secondary networks.
So, what happens for you if you loose the control computer connection?

For me, I am not changing things with a control computer during a show, so, perhaps I may not care.

Anyway, $.02 worth of food for thought


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Nathan Riddle:
Look into Spanning Tree and BGP. Loopguard for network redundancy for your data layer.

In laymens terms.

Create trunks with all your vlans between all primary/backup switches.
Turn on loopguard between primary/backup switches.

It won't protect against the device or switch going down on the primary side, but it will protect from the primary fiber going down.

https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/5234-5.html

Scott Holtzman:
BGP is layer 3 and Spanning Tree is not the way I would go.

If the switches support stacking just create a pair of stack links and be done with it. 

If the switches don't do that create a LAG or link aggregation group with vlan trunking.  All vlans in each switch will be linked.

Any devices with two uplinks plug one in each switch.  For a critical control computer you can add a second NIC and join them to a LAG group.  One link per switch.

This gives you host level high availability at layer 2

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Nathan Riddle:

--- Quote from: Scott Holtzman on December 22, 2017, 03:37:05 pm ---BGP is layer 3 and Spanning Tree is not the way I would go.

If the switches support stacking just create a pair of stack links and be done with it. 

If the switches don't do that create a LAG or link aggregation group with vlan trunking.  All vlans in each switch will be linked.

Any devices with two uplinks plug one in each switch.  For a critical control computer you can add a second NIC and join them to a LAG group.  One link per switch.

This gives you host level high availability at layer 2

--- End quote ---

BGP - Yeah - I mean for research's sake, not for his application. [I should have clarified]

Wouldn't that during failover cause issues with Dante switchover as the switches are handling the Dante switch too instead of Dante handling it at the device?

I guess you could put the backup Dante on Vlan 3 so they never touch... (which should be done either way).

Scott, when you get a break later would you mind explaining the benefits of your suggestion as opposed to spanning tree?

- A cursory glance at the differences is stacking is better for management and link aggregation is easier?
- I'd be more concerned about performance than ease of setup as both seem fairly straightforward.

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