I have 20 building campus running 10g fiber between buildings all phones are on campus( no remote phones) I have HP ZL switches with a PRI for outbound/inbound calling. Recently the phone Vlan (20) has been experiencing unacceptable voice quality issues. High jitter and digital noise, our Mitel Vendor almost pulled his arms out of this socket to point at our network (as with all vendors you have to prove to them its their issue as they will try to weasle out of any actual trouble shooting) SO here is the what I see
On the 3300 lots of these.....
Maintenance 3658 Info 2021/Oct/20 11:35:00 E2tSp IP Network Congestion Alert Jitter from phone 192.168.200.223 > 300ms Call... E2T Maintenance;0
on the switches where a 5320 is connected
Port Bytes Frames Errors RX Drops TX FlowControl Bcast Limit Status Mode Mode
A5 78,149,627 1,315,784,895 0 22,037,624 off 0 Up 100FDx MDIX 192.168.200.202 08 00 0f 6d a8 21 LAN port regDN 1328,MITE...
Like Clockwork almost every single (we have 270 phones) port that has a phone connected shows 22 million drops
We have a Barracuda f600 as Firewall with the gateway for the 192.168.200
We have quality issues phone to phone and phone to outside caller, we have phone to phone quality issues on the same switch.
Vlan 20 is setup as such
qos priority 6
voice
on all HP switches.
I am open to any thoughts