A service provider offers four classes of service for MPLS VPN customer with the following IPP/EXP values: i. voice = 5 ii. video = 4 iii. priority data = 3 iv. best-effort data = 0
The service-provider also supports multicast VPN services in the priority data and best-effort classes. Multicast VPN is implemented as a draft-rosen profile. On a
P router, in the MPLS core, the ingress QoS policy-map must classify all incoming packets, so that different classes of traffic can be property handled in fabric queues and egress queues. All types of packets in the core network must be covered.
Which ingress classification offers the optimal performance and provides the minimum number of actions that match the service provider QoS requirements?
A
class-map match-any VOICE match mpls experimental topmost 5 class-map match-any VIDEO match mpls experimental topmost 4 class-map match-any CONTROL match mpls experimental topmost 6 7 class-map match-any PRIORITY match mpls experimental topmost 3 ! policy-map INGRESS class VOICE set gos-group 5 class VIDEO set gos-group 4 class CONTROL set gos-group 6 class PRIORITYset gos-group 3 class class-default
B
class-map match-any VOICE match mpls experimental topmost 5 match precedence ipv4 flash-override class-map match-any VIDEO match mpls experimental topmost 4 match precedence ipv4 critical class-map match-any CONTROL match precedence ipv4 internet network class-map match-any PRIORITY match mpls experimental topmost 3 match precedence ipv4 flash ! policy-map INGRESS class VOICE set gos-group 5class VIDEO set gos-group 4 class CONTROL set gos-group 6 class PRIORITYset gos-group 3 class class-default
C
class-map match-any VOICE match mpls experimental topmost 5 class-map match-any VIDEO match mpls experimental topmost 4 class-map match-any CONTROL class-map match-any PRIORITY match mpls experimental topmost 3match precedence ipv4 flash ! policy-map INGRESS class VOICE setg os-group 5class VIDEO set gos-group 4 class CONTROL set gos-group 6 class PRIORITY set gos-group 3 class class-default
D
class-map match-any VOICE match precedence ipv4 critical class-map match-any VIDEO match precedence ipv4 flash-override class-map match-any PRIOTIRY match mpls experimental topmost 3 match precedence ipv4 flash ! policy-map INGRESS class VOICE set qos-group 5 class VIDEO set qos-group 4 class PRIORITY set qos-group 3 class class-default
Show Answer
