02-23-2008 03:42 AM - edited 03-03-2019 08:50 PM
hello friends,
iam configuring L3 switches where 2-3750 and 3560 switches are there 3750 is my core switch with whom 3560 are connected as client (vtp) i need to configure Voice and data vlan which should be working on each single port of 3560 and also where should i configure QOS whether on 3750 or 3560.
3750------3750
| |
|--3650--|
this is how it is coneected.Please help...
02-23-2008 05:18 AM
Sandy
Always rember one thing your voice vlan will be tagged with the existing vlan. But it should be tagged where your ip phone is atatched means the origin.
switchport voice vlan 10
switchport access vlan 10
Above commands can be run on the same port.
regards
shivlu
02-23-2008 09:48 PM
Hi Shivu,
you can configure both vlan in single port.u need to configure the QOS on both L3 swicthes
example for configuring the data & Voice vlan in single port
int f0/10
Swicth port access vlan 10
switch port voice vlan 20
Please let me know ,i have answered ypur queryies
02-23-2008 11:25 PM
Yes u can configure a signle switchport to both data & voice.
Lets say data vlan is 50 & voice vlan is 100. Then config on switchport looks like this:
int fa0/10
swithcport access vlan 50
switchport voice vlan 100
By default, pkts from data vlan are untagged while voice pkts are tagged by the IP phone itself. Any pkt tagged with QoS value looses its QoS value when it need to cross that switch. Thus you need to have a command "mls qos trust" on all access ports to which IP phones are conected. Also need to have this comand on trunk ports, as this makes the switch to pass the pkt to anothr device while retaining its attributes.
Pls note that within a LAN pkts are marked with COS values, if you need the pkts to travel WAN with QoS then you need to translate the COS values to DSCP.
hope this helps.
pls rate all helpful posts.
02-24-2008 11:10 PM
hi Sandy
I use the swiches webinterface to configure the ports, you just have to tell what port is Data+VoIP and the vlans used for that. The rest will be done by the macros (you can use the macro in the cli as well)
Use
hostname#show parser macro
to see the macros.
Willem
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