So, I know this is an age old question that's debated, but I've been wondering
if anyone here has a perspective here in regards to QoS for softphones.
Obviously, with hardphones, you usually partition a separate VLAN with
AutoQoS/DSCP tags, but that isn't applicable with softphones.
I've heard of three different options in the past, neither of which seem to be
very simple to deploy, but all seem to be Jabber-centric.
1. Configuring windows to perform DSCP tagging, and do DSCP QoS on the
switches they are connected to, as well as trusting the device. Problems:
Requires users to be local admins, openings for abuse and network impact due to
blind PC trust.
2. Configuring your switches with an access list that recognizes the ports
Jabber does outbound to attach DSCP tags to them. Problems: Other programs
could theoretically use those ports
3. Installing Medianet services on all jabber clients; Configure all
switches for medianet tagging. Problem: (I think?) Requires newer switches to
use, maybe needs an additional server (I vaguely remember possibly needing
prime collab?)?
Maybe I'm missing some things, but what approach have you guys taken for
softphone/Jabber QoS? And on top of that, what options are there for CIPC (I
know there's the auto qos trust cisco-softphone for cisco switches, but I don't
believe there's a solution other than #1 for non-cisco switches)?
Ben Amick
Telecom Analyst
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