Cisco Systems A9014CFD manual Marking Limitations, 24-28

Chapter 24 Configuring QoS

Configuring Quality of Service (QoS)

Table 24-2	QoS Classification Limitations by Interface
		GigabitEthernet		PPP
protocol
qos-group			X
source-address
vlan		X	X

The following limitations also apply when configuring classification on the Cisco ASR 901.

•The following limitations apply to input Gigabit Ethernet interface QoS policies:

–You can use the match vlan command with a maximum of four VLANs.The match vlan command is supported only for PORT, EVC, and pseudowire.

–You can use the match dcsp command with a maximum of four DSCP values.

–Cisco ASR 901 router first looks for IP DSCP and then the MPLS experimental imposition for the mpls packets.

•The following limitations apply to output Gigabit Ethernet interface QoS policies:

–Class maps with queuing action only support matching based on qos-group. This limitation does not apply to the class-default class map.

–You cannot create two class maps that match based on the same qos-group value.

•The following limitations apply to input PPP interfaces:

–You can create up to 8 matches in a class-map using DSCP or MPLS Exp values.

Marking Limitations

Table 24-3summarizes the values that you can use to mark traffic based on interface type. The values are parameters that you can use with the set command.

		Table 24-3	QoS Marking Limitations by Interface
				GigabitEthernet		PPP
		Value		Ingress	Egress	Ingress	Egress
		atm-clp
		cos		X
		discard-class		X
		dscp		X
		dscp-transmit		X
		ip dscp		X	X	X
		ip precedence		X	X
		mpls experimental
		mpls experimental imposition		X		X
		mpls experimental topmost			X
		qos-group
	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
24-28								OL-23826-09