18-4
Ethernet Card Software Feature and Configuration Guide, R7.2
January 2009
Chapter 18 Configuring Ethernet over MPLS
Configuring EoMPLS
By default, the ML-Series card does not map the IEEE 802.1P bits in the VLAN tag header to the MPLS
EXP bits. The MPLS EXP bits are set to a value of 0.
There is no straight copy between Layer 2 CoS and MPLS EXP, but the user can use the
set mpls experimental action to set the MPLS EXP bit values based on a match to 802.1p bits. This map ping
occurs at the entry point, the ingress of the network.
Quality of service (QoS) for EoMPLS traffic on ML-Series cards uses strict priority and/or weighted
round robin scheduling in the egress interface of both imposition and disposition router. This requires
selection of the service class queue that determines the type of scheduling. In the imposition router, the
priority bits EXP or RPR CoS that are marked based on policing are used to select the service class queue
and in the disposition router, the dot1p CoS bits (which are copied from EXP bits of the labels) are used
to do the same. In addition to scheduling in the egress interface, the output policy action can also include
remarking of EXP and RPR CoS bits.
EoMPLS on the ML-Series card uses the Cisco Modular Quality of Service Command-Line Interface
(MQC), just like the standard QoS on the ML-Series card. But the full range of MQC commands are not
available. Table 18-1 lists the applicable MQC statements and actions for the ML-Series card interfaces.
Configuring EoMPLS
The ML-Series peer cards on both endpoints of the EoMPLS point-to-point service must be configured.
Perform the following configuration tasks to enable EoMPLS:
• VC Type 4 Configuration on PE-CLE Port, page 18-5 (Either VC type 4 or VC type 5 is required.)
• VC Type 5 Configuration on PE-CLE Port, page 18-6 (Either VC type 4 or VC type 5 is required.)
Table 18-1 Applicable EoMPLS QoS Statements and Actions
Interface Applicable MQC Match Statements Applicable MQC Actions
Imposition Ingress match cos
match ip precedence
match ip dscp
match vlan
police cir
cir-burst [pir-bust pir
pir conform [set-mpls-exp | exceed
[set-mpls-exp][violate
set-mpls-exp]
Imposition Egress match mpls exp bandwidth {bandwidth-kbps | percent
percent}
and
priority kbps
and
[set-mpls-exp]
Disposition Ingress Not applicable Not applicable
Disposition Egress match mpls exp bandwidth {bandwidth-kbps | percent
percent}
and
priority kbps
and
set-cos cos-value