I have 2 switches, 2 vlans/switch, vlan 10 (voice vlan) vlan 20 (data vlan) , 1 MCS with CUCM 7.0.
I want to configure trunking between 2 switches but keep the qos of voice vlan.
This is my interface gigabitethernet 0/1 configuration.
interface gigabitethernet 0/1
switchport mode acces
swtchport acces vlan 20
switchport voice vlan 10
How i configure gigabitethernet 0/24 to trunk voice and data vlan and keep the qos of voice vlan.
on the tunk link between the tow switches
switchport trunk encapsulation dot1q
switchport mode trunk
mls qos trust dscp
this on both side of the switches
also make sure that cos 5 map to dscp 46]by issuing show mls map cos-dscp
this will preserve the qos marking is tat wha you looking for
my question here if you have only tow switches i think qos not an issue unless you have remote sites over a WAN link
anyway good luck
I have more switches, more locations, but all in a campus switched network.In this moment i don't have voip over WAN link.
commands - show mls map cos-dscp - map cos 5 to dscp 40?it's ok?
no it has to to be 46
enter the following command it will fix it to u
mls qos map cos-dscp 0 8 16 24 32 46 48 56
by the way al these config to keep the marking
if you want some sort of prioritization tell me what switches model you are usig and i will try to send you some commands to help in this
I have a link from our Cisco core switch to another Cisco switch, both sides marked with a vlan tag, this works fine. I can ping and connect to my server on this subnet.
The trouble is, the moment I add another link with the same vlan tag (I want to load balance/ have redundancy), the server drops off the face of the earth.
I have tried creating an etherchannel and adding the 2 ports to it, but this doesn't seem to work either.
On the port connecting to the Cisco IP Phone, try the Cisco macro/command "auto qos voip cisco-phone".
On the 802.1Q trunk use the "auto qos voip trust".
This is usually enough to provide QoS for Cisco IP Phone voice traffic.