Chapter 10 Qos - Cisco ASR 903 Manual

QoS
Chapter 10
Cisco ASR 903 supports three level hierarchical QoS, port, vlan and class level. Classification, marking, policing,
shaping and LLQ are supported. At class level, you can have up to 8 classes including class-default under a policy-
map. Three-level policy can only be applied to a physical port on the router. A three-level policy consists of:
• Topmost policy: class-default
• Middle policy: match vlan
• Lowest policy: match qos-group/match prec/match cos/match dscp
For example,
! class-level
class-map match-any P1
match dscp ef
class-map match-any C3
match dscp af31
class-map match-any C2
match dscp af41
class-map match-any C1
match dscp af11
policy-map GRAND_CHILD
class P1
priority
police cir percent 10
class C1
bandwidth remaining percent 10
class C2
bandwidth remaining percent 30
class C3
bandwidth remaining percent 40
class class-default
! vlan level
class-map match-all vlan10
match vlan 10
class-map match-all vlan20
match vlan 20
class-map match-all vlan30
match vlan 30
!
policy-map CHILD
class vlan10
shape average 30000000
service-policy GRAND_CHILD
class vlan20
shape average 40000000
OL-30526-01
QoS
af12
! can have up to 8 classes at class-level
Configuration for BGP PIC & RFC3107 (with ISIS) ▀
Cisco ASR 903 Router Design and Deployment Guide▄
127