Owner's Manual

445
- Ty p e —Code point type being created (Select from the pick list).
-
Bits —Using the code-point alias means using these bits.
The
Configure button executes the desired configuration on the selected equipment.Click the
Refresh button to re-query for these items.
Class of Service -> Forwarding Classes
This Panel manages COS forwarding classes—also known as ordered aggregates in the IETF's
DiffServ architecture. These affect the forwarding, scheduling, and marking policies applied to
packets as they transit a router. Select a supported class from the pick list. The forwarding class plus
the loss priority define the per-hop behavior.
The following rules govern queue assignment:
• If classifiers fail to classify a packet, the packet always receives the default classification to the
class associated with queue 0.
• The number of queues is dependent on the hardware plugged into the chassis. CoS
configurations are inherently contingent on the number of queues on the system. Only two
classes, best-effort and network-control, are actually referenced in the default configuration.
The default configuration works on any platform.
• CoS configurations that specify more queues than the platform can support are not accepted.
The commit fails with a detailed message that states the total number of queues available.
• All default CoS configuration is based on queue number. The name of the forwarding class
that shows up when the default configuration is displayed is the forwarding class currently
associated with that queue.
Figure 13-22. COS Forwarding Classes Panel