asked on "mls qos trust dscp" not working on new cisco 2960 poe switch
Hello,
We are in the process of upgrading our current Cisco Catalyst 3560 Series POE switch to a Cisco Catalyst 2960 Plus Series SI POE.
The config below is what we have in our current switches
when we try to transfer the config to the new switch, we get an error on the line below:
mls qos trust cscp
it does not like cscp, its not recognized. if I change it to COS it does not take,
my question is why it does not take cscp and what the difference is between CSCP and COS. We run voice over ip phones on these switches. the phones and phone system are Siemens.
interface FastEthernet0/46
switchport access vlan 501
switchport mode access
switchport voice vlan 101
speed 100
duplex full
priority-queue out
mls qos trust dscp
spanning-tree portfast
mlscos.jpg
We are in the process of upgrading our current Cisco Catalyst 3560 Series POE switch to a Cisco Catalyst 2960 Plus Series SI POE.
The config below is what we have in our current switches
when we try to transfer the config to the new switch, we get an error on the line below:
mls qos trust cscp
it does not like cscp, its not recognized. if I change it to COS it does not take,
my question is why it does not take cscp and what the difference is between CSCP and COS. We run voice over ip phones on these switches. the phones and phone system are Siemens.
interface FastEthernet0/46
switchport access vlan 501
switchport mode access
switchport voice vlan 101
speed 100
duplex full
priority-queue out
mls qos trust dscp
spanning-tree portfast
mlscos.jpg
ExchangeCiscoVoice Over IPSwitches / HubsNetworking
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Thank you KevinHSieh and Predrag Jovic, for helping clarify some of the confusion that i had.
Indeed the catalyst 3650 switches are layer 3 and the new switches 2960 are layer 2.
Indeed the catalyst 3650 switches are layer 3 and the new switches 2960 are layer 2.
You probably only need priority queuing on interfaces where there is a difference in bandwidth and there is contention, like on your WAN interface. I have IP phones on over a dozen different 2960 switches and have no issues without using COS. I do have QoS on the WAN interfaces of my routers, but nothing for the LAN.