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QOS on Switch Port and Firewall site to site VPN for VOIP Phones


I have 2 X 2960 switches that have 2 trunks (Etherchannel) with each other.

For configuring the qos for voice, I have set the following configuration on switch port

switchport access vlan 101

switchport mode access

mls qos cos 6

mls qos cos override

The firewall has the trunk interface with the switch.

Is there any configuration is needed on Etherchannel between the switches or the tunk interface of firewall to switch?

Is the configuration correct on switch port?

I am running a site to site VPN on the firewall and the remote site has the voice phones as well. How can i apply the priority to the voice traffic onto site to site VPN?

i am not able to configure the priority-queue as the voice interface is trunk. Can you please help me out how can i achieve that. please provide me the way to achieve that.

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