QoS Management(OptiX RTN 310)

In this interface, you can configure QoS parameters related to the OptiX RTN 310 NE.

Navigation Path

In the NE Explorer, select an NE and choose Configuration > QoS Management > QoS Management.

Parameters

Table 1 Diffserv Domain

Field

Value

Description

C-VLAN

0 to 7

Set the priority of the C-VLAN.

C-VLAN indicates the client-side VLAN. 7 indicates the highest priority.

MPLS EXP

0 to 7

Set the priority of the MPLS EXP.

EXP indicates the three bits of the MPLS packets, and carries the Diffserv information in the MPLS.

IP DSCP

0 to 63

Set the priority of the IP DSCP.

The DSCP section is a part of the service type section of the IP header, and labels the priority on packets.

PHB

BE, AF11, AF12, AF13, AF21, AF22, AF23, AF31, AF32, AF33, AF41, AF42, AF43, EF, CS6, CS7

IETF defines 16 standard PHBs.

  • BE: Indicates the traffic that need not be processed exceptionally.
  • AF1-AF4: Indicates the guaranteed forwarding. The CoS is applicable to the service that requires a certain rate, but does not limit the delay or jitter.
  • EF: Indicates fast forwarding. The CoS is applicable to the service of little delay and packet loss rate, such as the audio and video services.
  • CS6-CS7: Indicates the highest service class. The CoS is applicable to transport of signaling.
Table 2 Port Policy, Port Shaping

Field

Value

Description

Port

slot number-board name-port number(port name)

Displays the port name.

Packet Type

cvlan, ip-dscp, mpls-exp

Set the packet type.

One Diffserv domain may have many types of packets, such as the IP packets, VLAN packets, and MPLS packets. A set of mapping relations are available to use one ID to identify the mapping entities for configuration. The mapping relations are also used on ports.

Bandwidth Limit

Enabled, Disabled

The PIR, PBS can be set only when Bandwidth Limit is set to Enabled.

PIR (kbit/s)

For example: 1000

Set the maximum rate for the service to pass.

PBS (bytes)

For example: 1000

Set the peak burst size.

Table 3 QoS Configure

Field

Value

Description

CoS

BE, AF11, AF12, AF13, AF21, AF22, AF23, AF31, AF32, AF33, AF41, AF42, AF43, EF, CS6, CS7

IETF defines 16 standard PHBs.

  • BE: Indicates the traffic that need not be processed exceptionally.
  • AF1-AF4: Indicates the guaranteed forwarding. The CoS is applicable to the service that requires a certain rate, but does not limit the delay or jitter.
  • EF: Indicates fast forwarding. The CoS is applicable to the service of little delay and packet loss rate, such as the audio and video services.
  • CS6-CS7: Indicates the highest service class. The CoS is applicable to transport of signaling.

Grooming Policy After Reloading

SP, WRR, WFQ
Sets the grooming policy after reloading:
  • WRR Grooming Algorithm. The WRR grooming algorithm divides each port into several egress queues and grooms the packets in these queues in turn. This algorithm ensures that every queue obtains a certain period of service.
  • SP Queue Grooming Algorithm. packets of key services are placed in higher priority queues, and packets of non-key services (such as email) are placed in lower priority queues. In this way, packets of key services are always transmitted with a higher priority, and packets of non-key services are transmitted during the transmission intervals of key services.
  • WFQ Grooming Algorithm. A fair queue scheduling algorithm based on bandwidth allocation weights. This scheduling algorithm allocates the total bandwidth of an interface to queues, according to their weights and schedules the queues cyclically. In this manner, packets of all priority queues can be scheduled.

Policy Weight (%)

1 to 100

You can set Policy Weight (%) when the Groom Policy After Reloading is WRR.

Congest

Tail Drop Policy, RED, WRED
Set congestion management policy.
  • Tail Drop Policy: When the tail drop policy is used, the packets that arrive after a queue is full are discarded.
  • RED (Random Early Detection): When the RED policy is used, the packets are discarded at random when a queue reaches a certain length. In this manner, overall synchronization caused by the TCP slow-start mechanism is prevented.
  • WRED (Weighted Random Early Detection): When the WRED policy is used, the queue length and priorities of packets (colors) are considered for packet discarding. The user can configure the packet discarding as follows: The packets of higher discarding priorities (such as red packets and yellow packets) are first discarded. These packets are more probable to be discarded.

Tail Drop Threshold (256 bytes)

0 to 100

Set the tail drop threshold. Tail drop threshold refers to the percentage of the buffer space used by a queue to the total buffer size. When the length of the queue exceeds the value that is equal to the tail drop threshold multiplied by the buffer size, all subsequent packets are dropped. You can set either Tail Drop Threshold (256 bytes) or WRED, but not both.

WRED

Policy ID-Policy Name

Example: 1-default port wred

After bandwidth limit is enabled, you can select the default port WRED policy.

If the queue length is smaller than the lower drop threshold, the packets are not dropped. If the queue length is between the lower drop threshold and the upper drop threshold, the packets are randomly discarded. If the queue length is greater than the upper drop threshold, all the packets are dropped. You can set either Tail Drop Threshold or WRED, but not both.

Bandwidth Limit

Enable, Disable

The PIR, PBS can be set only when Bandwidth Limit is set to Enable.

PIR (kbit/s)

For example: 1000

Set the maximum rate for the service to pass.

PBS (bytes)

For example: 1000

Set the peak burst size.

Parent topic: QoS Management
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