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It sets the destination IP address of the packet.

It uses RVSP to inform other QoS capable routers how the packet should be treated.

It sets the TOS, DSCP, EXP, or DOT1p field based on classification criteria.

It can use a customer’s encapsulated data to determine a packet’s forwarding class.

An IES SAP

A VPLS SAP

A network port

AVPRN SAP

An access port

The slope-policy

The SAP-ingress policy

The network-queue policy

The scheduler-policy

The network-policy

The WRED-policy

The arbitrator-policy

A point in the network where EXP bits can be mapped to one of eight predefined FCs, each one with its own queue.

A logical point in a service tunnel where all of customer traffic is aggregated.

A point at which the initial classification of customer traffic occurs.

A point in the network where QoS parameters are discarded in favor of lower-level hardware queuing functions, such as LLI (Link Layer Interleave).

A point in the network where traffic flows from multiple different services are queued together, based on forwarding class.

The IOM3 adds more memory to both forwarding complexes which increases the total number of queues available.

The IOM3 only contains a single forwarding complex which reduces the number of queues used.

The IOM3 allows multiple forwarding classes to be assigned to a single queue.

The IOM3 allows queues to be dynamically allocated between ingress and egress.

The IOM3 has a larger CPU capable of tracking active hardware queue utilization and adjusting memory allocation accordingly.

Access ingress, access egress, network egress

Access ingress, network ingress, network egress

Port ingress, port egress, shared bi-directional

Port ingress, port egress, network egress

Port ingress, network ingress, network egress

Defining the slope of the TCP slow-start mechanism for self generated traffic.

Defining the slope of the scheduling rate per forwarding class when using HQoS.

Defining the high and low slope values when deploying buffer admission control for UDP traffic in the committed buffer pool.

Defining the high and low slope values when deploying buffer admission control for TCP traffic in the shared buffer pool.

Defining the high and low slope values when deploying buffer admission control for TCP traffic in the committed buffer pool.

512 MB ingress, 512 MB egress

512 MB for network ports, 512 MB for access ports

3.84 GB dynamically allocated between ingress and egress

2 GB, with a minimum of 512 MB ingress and egress, and an additional 1 GB dynamically allocated

PIR = 5 Mbps, CIR = 0 Mbps

PIR= 4 Mbps, CIR = 1 Mbps

PIR= 6 Mbps, CIR = 4 Mbps

PIR= 6 Mbps, CIR = 1 Mbps

It is a parent scheduler.

It is the top-level scheduler.

It can allocate up to 50 Mbps of bandwidth to scheduler "low" since the bandwidth is not used by another Tier 3 scheduler.

It is a child scheduler.

It can only have queues as children.