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Rob RudloffFlag for United States of America

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Voice VLAN through a "dumb" hub ?

I am a database guy, not a network guy, so bear with me here ...


Our company wants to deploy IP phones over a Voice VLAN.   


These new phones connect to our corporate network (via cat6) and the users PC connects to the phone, so there is some sort of mini-switch in the phone I reckon, so that PC data passes through the phone.


We have lots of Cisco "smart switches" of the SG2xx variety, or higher.  I have watched videos about configuring a "Voice LAN" on those switches, and it seems pretty straightforward -- I understand VLAN's somewhat.


Here's my question:

The "smart" switches can handle the VLAN fine (they're built for that), but what if there is a "dumb" hub in between the phone and the main switch?  Does the hub allow the VLAN through, or will this break the VLAN at that phone?


Thanks

Rob


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Don Johnston
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Yes, these are hubs are probably "unmanaged switches" in reality, so they may be OK.  

It looks like, based on the links from CompProbSolv, I'll need to test it to make sure.  I am trying to avoid plugging the phones into anything but the main managed switches, but there's a few spots that have "other" hardware, so I might have to test and swap as needed.

Thanks!

The only problem you could possibly run into would be if the mini-switches are store-and-forward switches and they discard giant frames (ethernet frames larger than 1518 bytes).  But that seems unlikely