Network queue policies define the queue characteristics that are used in determining the scheduling and queuing behavior for a given forwarding class or forwarding classes. Network queue policies are applied on ingress and egress network ports, as well as on the ring ports and the add/drop port on the 2-port 10GigE (Ethernet) Adapter card and 2-port 10GigE (Ethernet) module.
Network queue policies are identified with a unique policy name that conforms to the standard 7705 SAR alphanumeric naming conventions. The policy name is user-configured when the policy is created.
Network queue policies can be configured to use up to 16 queues (8 unicast and 8 multicast). This means that the number of queues can vary. Not all user-created policies will require and use 16 queues; however, the system default network queue policy (named default) does define 16 queues.
The queue characteristics that can be configured on a per-forwarding class basis are:
Committed Buffer Size (CBS) as a percentage of the buffer pool
Maximum Buffer Size (MBS) as a percentage of the buffer pool
High-Priority-Only Buffers as a percentage of MBS
Peak Information Rate (PIR) as a percentage of egress port bandwidth
Committed Information Rate (CIR) as a percentage of egress port bandwidth
Table: Default Network Queue Policy Definition describes the default network queue policy definition.
The system default network queue policy cannot be modified or deleted.
In the table, the value for Rate in the Definition column is the PIR value.
Forwarding Class |
Queue |
Definition |
Queue |
Definition |
|---|---|---|---|---|
Network-Control (nc) |
8 |
Rate = 100% CIR = 10% MBS = 2.5% CBS = 0.25% High-Prio-Only = 10% |
16 |
Rate = 100% CIR = 10% MBS = 2.5% CBS = 0.1% High-Prio-Only = 10% |
High-1 (h1) |
7 |
Rate = 100% CIR = 10% MBS = 2.5% CBS = 0.25% High-Prio-Only = 10% |
15 |
Rate = 100% CIR = 10% MBS = 2.5% CBS = 0.1% High-Prio-Only = 10% |
Expedited (ef) |
6 |
Rate = 100% CIR = 100% MBS = 5% CBS = 0.75% High-Prio-Only = 10% |
14 |
Rate = 100% CIR = 100% MBS = 5% CBS = 0.1% High-Prio-Only = 10% |
High-2 (h2) |
5 |
Rate = 100% CIR = 100% MBS = 5% CBS = 0.75% High-Prio-Only = 10% |
13 |
Rate = 100% CIR = 100% MBS = 5% CBS = 0.1% High-Prio-Only = 10% |
Low-1 (l1) |
4 |
Rate = 100% CIR = 25% MBS = 2.5% CBS = 0.25% High-Prio-Only = 10% |
12 |
Rate = 100% CIR = 5% MBS = 2.5% CBS = 0.25% High-Prio-Only = 10% |
Assured (af) |
3 |
Rate = 100% CIR = 25% MBS = 5% CBS = 0.75% High-Prio-Only = 10% |
11 |
Rate = 100% CIR = 5% MBS = 5% CBS = 0.1% High-Prio-Only = 10% |
Low-2 (l2) |
2 |
Rate = 100% CIR = 25% MBS = 5% CBS = 0.25% High-Prio-Only = 10% |
10 |
Rate = 100% CIR = 5% MBS = 5% CBS = 0.1% High-Prio-Only = 10% |
Best Effort (be) |
1 |
Rate = 100% CIR = 0% MBS = 5% CBS = 0.1% High-Prio-Only = 10% |
9 |
Rate = 100% CIR = 0% MBS = 5% CBS = 0.1% High-Prio-Only = 10% |