We currently have 2 locations that are connected via 100Mbps metro ethernet (Cisco 3550 on each side) that is rate limited at 15 Mbps by the provider. On our network, we currently use "auto qos voip trust" for all trunk ports and "auto qos voip cisco-phone" for all access ports.
What is the best way to configure the ports that terminate our metro ethernet to ensure that VoIP signalling/traffic have sufficient bandwidth? I assume that "auto qos" won't work since both sides think there is a full 100Mbps available. Can anyone provide a config example?
If you slow your outbound connection to 10 Mbps, it would work since you'll now will not exceed the provider's 15 Mbps. If your outbound connection remains at 100 Mbps, yes you'll insure your VoIP is protected if there's transient congestion at 100 Mbps, but the issue is what does your provider do with the 100 Mbps? (Even though your VoIP won't exceed 100, unless the provider treats traffic differently they can still drop VoIP when all your traffic bandwidth exceeds 15.)