Cisco Systems A9014CFD ACL-based QoS Restrictions, Policing with, Shaping Limitations, 24-30

Chapter 24 Configuring QoS

Configuring Quality of Service (QoS)

Table 24-5	QoS Rate Limiting Limitations by Interface
		GigabitEthernet		PPP
Policing with		Ingress	Egress	Ingress	Egress
One rate
One rate and two		X
actions
Two rates and two
actions
Two rates and		X
three actions

Shaping Limitations

Table 24-6summarizes the values that you can use to mark traffic based on interface type. The values are parameters that you can use with the shape command.

Table 24-6	QoS Shaping Limitations by Interface
			GigabitEthernet		PPP
		Value	Ingress	Egress	Ingress	Egress
		adaptive
		average		X
		fecn-adapt
		max-buffers
		peak

The following limitations also apply to QoS shaping on the Cisco ASR 901:

•The following limitations apply to input Gigabit Ethernet interfaces:

–You cannot apply shaping to the class-default class unless you are using hierarchical policy maps and applying shaping to the parent policy map.

–If you are using hierarchical policy maps, you can only apply the class-default class to the parent policy map.

ACL-based QoS Restrictions

In addition to all the limitations applicable to current QoS configuration, the following restrictions are applicable for ACL-based QoS.

•IPv6 ACLs are not supported

•ACL-based QoS is limited to source and destination IP addresses. Extended ACLs with extended options like DSCP, fragments, option, precedence, time-range, ToS, and TTL are not supported.

•MAC ACLs are not supported. Only IP ACLs are supported.

•You can configure only named access lists in QoS; other ACL types are not supported.

•Only source and destination IPv4 addresses are supported in the access-list definition.

	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
24-30	OL-23826-09