[cisco-voip] phones working on a dumb switch with voice/data vlans switched properly

[Lelio Fulgenzi]

OK - I'm probably showing my ignorance here, but I was quite surprised to find out that plugging in a dumb Dlink DES-105 switch into our cisco switch with access layer programming, so data vlan and voice vlan, extended things such that when a phone is plugged in, it got an IP address on the voice vlan, and plugging a non-phone device got an ip address on the data vlan and then plugging a similar device into the back of the phone also got an ip address on the data vlan. We plugged in multiple phones as well. All worked fine. *phones powered by brick*

I can appreciate a passthrough device, I've used them before as ethernet extenders. By what I'm not understanding is how traffic is being classed properly through to this dumb switch.

We're using a new 9300 series switch, but I'm not sure that would make a difference.



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Lelio Fulgenzi, B.A. | Senior Analyst
Computing and Communications Services | University of Guelph
Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON | N1G 2W1
519-824-4120 Ext. 56354 | lelio at uoguelph.ca<mailto:lelio at uoguelph.ca>

www.uoguelph.ca/ccs<http://www.uoguelph.ca/ccs> | @UofGCCS on Instagram, Twitter and Facebook

[University of Guelph Cornerstone with Improve Life tagline]

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