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Presentation_ID
31
PQ2
Port
Level
(L1)
BW
4 Layer Hierarchy QoS Overview
Ingress & Egress
BW
PQ1
EVC3
EVC 4
Customer2 - egress
Business Critical
VoIP – Bearer + Control
Telepresence
Internet – Best Effort
BW
Internet – Best Effort
PQ1
VoIP – Bearer + Control
PQ2
BW
BW
PQ1
EVC1
EVC 2
Customer1 - egress
Business Critical
VoIP – Bearer + Control
Telepresence
Internet – Best Effort
BW
Internet – Best Effort
PQ1
VoIP – Bearer + Control
Note: We count
hierarchies as follows:
4L hierarchy = 3 Level
nested p-map
3L hierarchy = 2 level
nested p-map
L1 level is not
configurable but is
implicitly assumed
Hierarchy levels used are
determined by how many
nested levels a policy-
map is configured for and
applied to a given (sub-)
interface
Parent
Level (L3)
Grandparent
Level (L2)
Child / Class
Level (L4)
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