Hi there. I've got a Cisco infrastructure, but a non-Cisco VOIP platform (Mitel 3300). I've been experiencing some call quality issues lately, so I was reviewing port configs on the access switches at three of my corporate sites. These switchport configs were setup before I joined the company, and seem to have been setup by different people at different times and with different intentions (ie. wildly varying config).
The access switches at each site tend to be Catalyst 3750 POE, but the switchport config can vary:
eg. Site A:
interface FastEthernet1/0/10
description typical VOIP switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 111
switchport mode trunk
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
mls qos trust cos
auto qos voip trust
spanning-tree portfast trunk
end
eg. Site B:
interface FastEthernet3/0/10
description typical VOIP switchport
switchport access vlan 122
switchport mode access
switchport voice vlan 120
spanning-tree portfast
end
eg. Site C:
interface GigabitEthernet1/0/10
description typical VOIP switchport
switchport mode access
switchport port-security maximum 5
switchport port-security
switchport port-security violation restrict
srr-queue bandwidth share 1 30 35 5
priority-queue out
mls qos trust cos
macro description USERS
auto qos trust
storm-control broadcast level 70.00
spanning-tree portfast
end
Most of the end user work areas have a single LAN drop, and we connect the Mitel VOIP phone to that, and connect the user's PC/laptop to the phone's PC port. Also, between all corporate sites, there is a 50 Mbps TLS service, provided by our ISP/telco, and we have a separate Mitel 330 VOIP switch at each site.
What is the best config, given my requirements and above, for my Cat 3750 POE switchports in order to best concurrently support data and VOIP traffic? Are any of the above examples good enough?
Thanks so much in advance,
- Jeremy
