Alcatel-Lucent 7450 - Page 48

QoS Policies
48 Quality of Service Guide
Figure 4: Traffic Queuing Model for 3 Queues and 3 Classes
When configured with this option, the forwarding class and drop priority of incoming traffic
will be determined by the mapping result of the EXP bits in the top label. Table 8 displays he
new classification hierarchy based on rule type.:
OSSG236
AAA
BBABAAEEE
BBB
EEE
Ingress
QoS
Match
Criteria
Series - 1
Packet
Stream
Queue Depth:
Based on PIR andf FC
Expedited
High
Scheduler
Low
Scheduler
Assured
Best Effort
Table 8: Forwarding Class and Enqueuing Priority Classification Hierarchy Based on Rule Type
# Rule Forwarding Class Enqueuing Priority Comments
1 default-fc Set the policy’s
default forwarding
class.
Set to policy default All packets match the default
rule.
2 dot1p dot1p-
value
Set when an fc-name
exists in the policy.
Otherwise, preserve
from the previous
match.
Set when the priority
parameter is high or
low. Otherwise,
preserve from the
previous match.
Each dot1p-value must be
explicitly defined. Each
packet can only match a single
dot1p rule.
3 lsp-exp exp-value Set when an fc-name
exists in the policy.
Otherwise, preserve
from the previous
match.
Set when the priority
parameter is high or
low. Otherwise,
preserve from the
previous match.
* Each exp-value must be
explicitly defined. Each
packet can only match a single
lsp-exp rule.
* This rule can only be applied
on Ethernet L2 SAP