Cisco WS-X6708-10G-3CXL= - 10 Gigabit Ethernet Module Manual de usuario descargar pdf (Pagina 56)

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queue thresh cos-map

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A restriction has been imposed, however, that does not permit you to modify QoS settings on the VSL ports in the

initial release of software. Hence, you can modify only the default queue, drop threshold, and buffer depth settings.

vss(config)#int te2/5/4

vss(config-if)#priority-queue cos-map 1 2

HWIF-QOS: QoS configs are not allowed on VSL Portgroup

Additionally, policy maps used for classification or policing are also forbidden on the VSL and its respective members.

This feature will be addressed in future software releases.

Control Traffic over VSL

Multiple types of control traffic must be parsed between the two virtual switches, including VSLP and other inband

messages. These special control frames are tagged with a special bit internal to the system, indicating that they

require specialized treatment and are automatically assigned to the priority queue of the interface for expedited

delivery. As a result, no extra configuration is required.

The priority queue is always serviced first, prior to any other Deficit Weighted Round Robin (DWRR) queues.

Using Supervisor Engine 720-10G VSS 10 Gigabit Ethernet Uplink Ports as VSL Interfaces

You can use the 10 Gigabit Ethernet uplink ports on the Supervisor Engine 720-10G VSS to form a VSL. In addition

to the two 10 Gigabit Ethernet uplink ports, there are also three additional Gigabit Ethernet ports: two Small Form -

Factor Pluggable (SFP) interfaces and a 10/100/1000 RJ-45 interface. You cannot use these ports as VSL interfaces.

If you use only the 10 Gigabit Ethernet ports, you can optimize the queue structure to take full advantage of an 8q4t

queue structure on receive and 1p7q4t queue structure on transmit. However, if you use both the Gigabit Ethernet

interfaces and 10 Gigabit Ethernet interfaces concurrently, then the 10 Gigabit Ethernet interfaces take on the queue

structure of the Gigabit Ethernet interfaces, which is 4q4t on receive and 1p3q4t on transmit.

If you want to use only the 10 Gigabit Ethernet ports, you must shut down the Gigabit Ethernet ports and globally

configure an extra CLI on the system:

VSS(config)#mls qos 10g-only

Error: following ports have to be shut to enable 10g-only mode:

Gi1/5/1 Gi1/5/2 Gi1/5/3

Command Rejected!

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Cisco WS-X6708-10G-3CXL= - 10 Gigabit Ethernet Module Manual de usuario Pagina 56