Cisco Systems ONS 15310-MA, ONS 15310-CL manual QoS on RPR, Flow Control Pause and QoS, 12-9

Chapter 12 Configuring Quality of Service on the ML-Series Card

QoS on RPR

the QinQ network, the QoS is then implemented based on the IEEE 802.1p bit of the SP tag. The ML-Series cards do not have visibility into the customer CoS, IP precedence, or DSCP values after the packet is double-tagged (because it is beyond the entry point of the QinQ service).

Figure 12-6illustrates the QinQ implementation on the ML-Series card.

Figure 12-6 QinQ Implementation on the ML-Series Card

IEEE 802.1p

(3 bits)

CoS CFI

VLAN ID

Customer VLAN Tag

IEEE 802.1Q Tag

6Destination Address

6Source Address

2	Type=8100
2	Tag Control Information
2	Type=8100

2Tag Control Information

2Type/Length

42~1500	PAD
	MAC DATA
4	FCS

96500

SP CoS bit

(3 bits)

CoS CFI

VLAN ID

Service Provider Tag

QinQ Tag

The ML-Series cards can be used as the IEEE 802.1Q tunneling device for the QinQ network and also provide the option to copy the customer frame’s CoS bit into the CoS bit of the added QinQ tag. This allows the service provider QinQ network to be fully aware of the necessary QoS treatment for each individual customer frame.

Flow Control Pause and QoS

If flow control and port-based policing are both enabled for an interface, flow control handles the bandwidth. If the policer gets noncompliant flow, then the policer drops or demarks the packets using the policer definition of the interface.

Note QoS and policing are not supported on the ML-Series card interface when link aggregation is used.

Note Egress shaping is not supported on the ML-Series cards.

QoS on RPR

For VLAN bridging over RPR, all ML-Series cards on the ring must be configured with the base RPR and RPR QoS configuration. SLA and bridging configurations are only needed at customer RPR access points, where IEEE 802.1Q VLAN CoS is copied to the RPR CoS. This IEEE 802.1Q VLAN CoS copying can be overwritten with a set-cosaction command. The CoS commit rule applies at the RPR ring ingress. Transit RPR ring traffic is classified on CoS only.

If the packet does not have a VLAN header, the RPR CoS for non-VLAN traffic is set using the following rules:

1.The default CoS is 0.

Cisco ONS 15310-CL, ONS 15310-MA, and ONS 15310-MA SDH Ethernet Card Software Feature and Configuration Guide, R9.1 and R9.2

78-19415-01 12-9