i there, is anybody out there with an official (or unofficial) documentation on how to priorize the traffic that comes from VOICE "Yealink" Phones on Cisco switches. We have little problems with the voice quality (Sometimes the voice gets really quiet) We've enabled LLDP and "Voice vlan" on the ports of our edge switches (SG350)for our phones:
no snmp trap link-status storm-control broadcast level 10 storm-control multicast level 10 port security max 2 port security mode max-addresses port security discard trap 120 spanning-tree portfast spanning-tree guard root spanning-tree bpduguard enable switchport mode trunk switchport trunk native vlan 50 switchport trunk allowed vlan 50,333 no cdp enable
SwitchEdge01#show voice vlan Administrate Voice VLAN state is auto-triggered Operational Voice VLAN state is auto-enabled Best Local Voice VLAN-ID is 333 Best Local VPT is 5 (default) Best Local DSCP is 46 (default) Agreed Voice VLAN is received from switch 44:3c:48:CE:8A:D7 Agreed Voice VLAN priority is 0 (active static source) Agreed Voice VLAN-ID is 333 Agreed VPT is 5 Agreed DSCP is 46 Agreed Voice VLAN Last Change is 18-Jun-19 06:46:28
but there are still some issues. So...how can one make sure that voice traffic is treated primary by the switch. Furthermore we want to know how to configure the core switch (C3750) for these issues? The core switch is connected via a trunk with the edge switch. I mean the edge switches with ports configured is just one part of the overall net design to priorize the voice traffic. But what about the core switchtes? How do one prioritize the voice traffic when there is no phone connected directly?