What is a simple config for a switchport to apply QoS. I have a 2960 with a 7960 phone plugged in and a computer plugged into the phone. I'm concerned about not trusting the computer and at the same time trusting the phone. I'm under the impression that 'mls qos trust device cisco-phone' will use CDP to allow the DSCP markings applied by the phone but what about the computer? How do I make sure someone isn't marking their packets manually to gain priority? TIA.
When you use mls qos trust device cisco-phone phone will override cos values to cos 0 from PC, use it with mls qos trust cos/dscp command. There will be default command: switchport priority extend cos 0 which mark all PC traffic to cos 0.
Let say, you are trusting CoS by "mls qos trust CoS" Then switch will trust the CoS value of the incoming frame. Then Switch will use the internal CoS to DSCP mapping table to Mark the DSCP value for that received Packet.
Yes, "mls qos trust device cisco-phone" will only trust the packet come from the IP Phone and mark all other packet comes from the PC to 0.
Both of the above allow me to mark packets with the phone AND the PC. So, now my question is... what's the purpose of 'mls qos trust device cisco-phone'? You say it only allows packets from the phone to be marked but that isn't the case for me. Bug on my switch?
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.