Cisco Systems A9014CFD manual Configuring Marking, 24-38

Chapter 24 Configuring QoS

Configuring Quality of Service (QoS)

	Command or Action	Purpose
Step 6
	rewrite ingress tag pop 1 symmetric	Specifies the encapsulation modification to occur on packets at
		ingress.
	Example:	• pop 1—Pop (remove) the outermost tag.
	Router(config-if-svr)# rewrite ingress tag	• symmetric—Configure the packet to undergo the reverse of
	pop 1 symmetric
		the ingress action at egress. If a tag is popped at ingress, it
		is pushed (added) at egress.
		Although the symmetric keyword appears to be optional, you
		must enter it for rewrite to function correctly.
Step 7
	xconnect peer-ip-address vc-id	Binds an attachment circuit to a pseudowire, and configures an
	encapsulation mpls	Any Transport over MPLS (AToM) static pseudowire.
	Example:	• peer-ip-address—IP address of the remote provider edge
		(PE) peer. The remote router ID can be any IP address, as
	Router(config-if-srv)# xconnect 1.1.1.1 100	long as it is reachable.
	encapsulation mpls	• vc-id—The 32-bit identifier of the virtual circuit (VC)
		between the PE routers.
		• encapsulation—Specifies the tunneling method to
		encapsulate the data in the pseudowire.
		• mpls—Specifies MPLS as the tunneling method.
Step 8
	service policy input policy name	Attaches the policy map to an interface.
		• input—Specifies the direction in which the router applies
	Example:	the policy map.
	Router(config-if-srv)# service-policy input	• policy name—The name of the policy map.
	policy1
Step 9
	exit	Enters global configuration mode.

Configuring Marking

Marking network traffic allows you to set or modify the attributes for packets in a defined traffic class. You can use marking with traffic classification to configure variety of QoS features for your network.

The Cisco ASR 901 marking allows you to modify the following packet attributes:

•Differentiated services code point (DSCP) value

•Class of service (CoS) value

•MPLS Exp bit value

•Qos-group value (internal)

For instructions on how to configure marking for IP Precedence, DSCP, or CoS value, see the following sections:

•Creating a Class Map for Marking Network Traffic

•Creating a Policy Map for Applying a QoS Feature to Network Traffic

•Attaching the Policy Map to an Interface

For instructions on how to configure MPLS Exp bit marking, see:

•Configuring MPLS Exp Bit Marking using a Pseudowire.

	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
24-38	OL-23826-09