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Phone port config question

We have a mix of cisco phones. Basically one's with a single rj-45 port on it and one's with the built in switch. We do trunking on the port's the phone's are connected to with voice vlan and data vlan seperate. I was wondering if you can put either spanning-tree rootguard or spanning-tree BPDUguard on those ports without it breaking anything?

Hall of Fame Super Silver

Re: Phone port config question

It will not cause any issues. BPDUguard protect from a connected switch to become a root bridge, obviously the phone cannot be a root bridge so there will be no issue.


Community Member

Re: Phone port config question

What switches do you have? With a "voice-capable" switches with inline power you do not need to configure a switch port as a trunk. All you do - you define access VLAN and auxuliary VLAN. When switch detects a Cisco IP phone, it does "magic" with the port, but port does not become "trunk".

We have BPDU guard on all "access" ports without checking if we have phone or not.

Good luck,

Michael Shavrov

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