High Priority Classes - Alcatel-Lucent 7450 Quality Of Service Manual

FC-ID FC Name
7 Network
Control
6 High-1
5 Expedited
4 High-2
3 Low-1
2 Assured
1 Low-2
0 Best Effort
Table 2
behavior, in terms of ingress marking interpretation and egress marking, can be changed by
a
out-of-profile, and exceed-profile at egress.
The forwarding classes can be classified into three class types:

High Priority Classes

The high priority forwarding classes are Network Control (nc), Expedited (ef), High 1 (h1),
and High 2 (h2). High priority forwarding classes are always serviced at congestion points
over other forwarding classes; this behavior is determined by the router queue scheduling
algorithm
Quality of Service Guide
Table 2: Forwarding Classes
FC DiffServ
Designatio Name
n
NC NC2
H1 NC1
EF EF
H2 AF4
L1 AF2
AF AF1
L2 CS1
BE BE
presents the default definitions for the forwarding classes. The forwarding class
Network QoS Policies. All forwarding class queues support the concept of in-profile and
• High priority/Premium
• Assured
• Best effort
(Virtual Hierarchical
Class Type Notes
High-Priority Intended for network control traffic
Intended for a second network control
class or delay/jitter sensitive traffic
Intended for delay/jitter sensitive traffic
Intended for delay/jitter sensitive traffic
Assured Intended for assured traffic. Also is the
default priority for network management
traffic
Intended for assured traffic
Best Effort Intended for BE traffic
Scheduling).
QoS Policies
19