Live Audio network redundancy by LAG (AVB, Digigrid)

[Lou 1975]

Hi All,

I'm a sound engineer who fly's over the globe from large scale festival to festival. I do travel with my own lightweight setup. Consist of a mixing console (located inbetween the audience) and the AD-coverter (located on stage). I'm searching for a way to make the network connection between the mixing console in between the audience and the AD converter on stage redundant using two switches setup with a LAG using two ports. But keeping audio drops (packet loss) when 1 cable disconnects. Now i found BFD over LAG and now i get lost since i don't know where i can find which lightweight switch this supports and how to configure. And maybe there is a other solution to make this work. I'm not a network specialist but i hope someone knows how to set this up.

Let me know your thoughts.
Thnx in advance,
Laurens

[balaji.bandi]

what switch model ? How does your Switch config Looks like ?

you can select LAG algorithm - src-dest MAC and src-dest ip try different.

[Lou 1975]

Hii BB, thnx for your reply.

I don't have a switch yet, after a long disappointing helpdesk adventure with a other brand (pro AV) i thought i would first check if this is actual possible. Was hoping that the SG250-08 would do the trick, since they are small and lightweight.

[balaji.bandi]

To be honestly short Answer for you YES / NO (i know it disapoint you but  this what it is ?)

As per the switching concern - we do LAG these scenarios.

 - More bandwidth required, so you can add 2 ports to increase bandwidth like 2 X 1GB ( 2GB)

- high availability if one of the Link go down, other give resiliance.

other side that should work for you. but again you need to test what you looking to do please.

[Lou 1975]

Thnx again for your reply, (Disappointing, yes)

Bandwith is not the issue.
- high availability if one of the Link go down, other give resiliance. (they call it BFD over LAG multihop (RFC 5883)). I think that is the Issue. Audio drops (packet loss) are not an option.

Not afraid to start a other proces with a helpdesk to see where we going. Have two questions.
- Wondering if anyone have any experience with this. (since I know, a lot of people are looking for this solution)
- Is there a big difference in lag configuration between the bigger heavier and more expensive switches or if the SG250-8 does the same?

Thnx,

[LucidM]

Note that the Cisco SG series and now the replacement CBS range do NOT support AVB.  You have to step up to the enterprise grade switches from Cisco for AVB support.  These are large, heavy and not very travel friendly!  Also note that Cisco switches do NOT support AVB over LAGs.

Biamp.com has some good resources for AVB switch options and how to configure them.  Since most of their products are AVB based.

If you are using Dante, then the SG series or CBS series from Cisco are fine.