07-12-2012 02:02 AM - edited 03-16-2019 12:09 PM
Hello all,
I am not all that familiar with VoIP and I have a few questions.
We need to connect a couple of IP phones in our environment. The IP phones need to be isolated and no PCs will be connected to their switch port.
PoE switches will be used to accomodate these IP Phones.
My questions are:
I have read that if QoS is not enabled globally on a switch all packets/frames are passed through unaltered, meaning that their CoS or DSCP values are not changed. So if the CoS value of the voice frame is 5, that won't be changed to the default value of 0. Correct?
Thank you in advance,
Katerina
07-12-2012 02:12 AM
HI,
1) If you have enough Bandwidth for voice call, you do not need the QOS. But I would say what is harm in enabling quto QOS.
2) You can use Maximum MAC Addresses for Voice and Data VLANs
Regards
Ronak Patel
Rate helpful posts by clicking stars below the answer.
07-12-2012 02:44 AM
Ronak,
thanks for the link. I had not seen the port-security voice vlan command before, so that serves my needs.
As for auto qos. True... no harm in configuring it anyway...!
07-12-2012 02:13 AM
You don't really need QoS on switches, not even if there is data traffic. Some people witll tell you otherwise, but that is my expereince of 10 years, and hundreds of installations.
You can configure any port secuirty you want.
07-12-2012 02:16 AM
Paolo Bevilacqua wrote:
You don't really need QoS on switches, not even if there is data traffic. Some people witll tell you otherwise, but that is my expereince of 10 years, and hundreds of installations.
You can get away without QoS on the ports which the phones plug into. However, I really would put QoS on uplink/trunk ports. (Unless you have more bandwidth than you can shake a stick at)
GTG
07-12-2012 02:35 AM
You can get away without QoS on the ports which the phones plug into. However, I really would put QoS on uplink/trunk ports. (Unless you have more bandwidth than you can shake a stick at)
Maybe my customers are light users, but I never see congestions or drops on any trunk (N x Gb ).
07-12-2012 02:45 AM
I think I will enable auto qos anyway... just to be on the safe side.
Best regards,
Katerina
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide