02-05-2008 05:24 AM - edited 03-05-2019 08:56 PM
Hi There !
Is there any specific configuration for switchports using IPCommunicator ???
I'm having some voice quality problems...
Any help ?
Thanks.
Andrei.
02-05-2008 06:06 AM
Hi Andrei,
If you're using a modern switch (such as the 2960, 3560, or 3750), you should be able to use the AutoQoS feature to automatically define port configuration.
Go into the switchport that you're having problems with:
switch(config)# interface FastEthernet 0/1
switch(config-if)#
Then you need to tell the switch you want to apply automatic QoS to this port, optimising it for connection to a Cisco IP Communicator client:
switch(config-if)# auto qos voip cisco-softphone
After a pause while AutoQoS is applied to the switch (globally), the command prompt will return. If you show the running config on the switch you will find that AutoQoS has applied a number of commands at the global level, and on the interface you entered the commands on, you should see something like this (I have marked the new commands with ***):
interface FastEthernet0/1
switchport access vlan 10
switchport mode access
switchport voice vlan 20
no logging event link-status
srr-queue bandwidth share 10 10 60 20 ***
srr-queue bandwidth shape 10 0 0 0 ***
mls qos trust device cisco-phone ***
mls qos trust cos ***
no snmp trap link-status
auto qos voip cisco-softphone
spanning-tree portfast
If your switch doesn't support the AutoQoS command, then I don't know if you can really do much else on the switching level. I've not encountered anything personally.
If you can set this up, you may find it improves things for you. Let me know if it makes things better.
Kind regards,
Graeme
02-25-2008 10:28 AM
There's at least one other thing you can do without AutoQoS, and that is set up CBWFQ with access-lists to match VoIP traffic.
02-25-2008 08:54 AM
Not that I know off.
but then again you can always do some QoS,CoS in the switch, do some policing, depends on the enviroment, type of problem and situation.
please rate if this is helpful
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