in general if the ports are trunk ports CoS bits are a copy of the CS bits of the DSCP field.
So until it is so there is neither a perfect corrispondence neither a total incompatibility.
For the specific of VSS you could start look at
Configuring VSL QoS
The virtual switching system automatically configures VSL ports for trust CoS, using default CoS mappings (you cannot change the mappings on VSL ports).
For switching modules that support per-ASIC configuration, the VSL configuration applies to all ports on the same ASIC (including any non-VSL ports).
The virtual switching system disables the QoS commands on VSL ports (and any non-VSL ports on the same ASIC). For example, you cannot use QoS queuing or map commands on VSL ports.
To ensure that all eight QoS receive queues are enabled for the 10-Gigabit Ethernet ports on the supervisor engine, enter the mls qos 10g-only global configuration command.
In Cisco IOS Release 12.2(33)SXI and later releases, when the mls qos 10g-only command is entered and only one of the two 10-Gigabit Ethernet ports on the supervisor engine is a VSL port, the non-VSL 10-Gigabit Ethernet port can be configured for QoS.
Sorry, I don't understand very well ... all ports between access, distribution and core switches are trunk. So, if I configure these ports as mls qos trust DSCP is sufficient even if the mode is queuing
Queuing Mode In Tx direction: mode-cos and the VSL ports have mls qos trust Cos?
because you cannot use trust DSCP on VSL links to be sure that you will not have problems you should trust CoS everywhere on all trunk ports directly connected to the VSS.
In this way you can be sure of consistency in QoS treatment.
However, all multilayer switches use internal DSCP tags for QoS classification of flows and the default action is that CoS field is a copy of CS bits of DSCP so there shouldn't be frames without CoS configured on trunks to the VSL.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.