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PowerCube 500 System Configuration Guide (PC500-300H1, PC500-300G1, EG6P-150G1)

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
LAG Management_LAG Creation

LAG Management_LAG Creation

This section describes parameters associated with LAG creation.

Table 5-3 Attribute parameters

Parameter

Value Range

Description

LAG No.

1-4

This parameter specifies the LAG ID. This parameter can be set only if Automatically Assign is not selected.

LAG Name

A character string with less than 64 characters, which can be letters, numerals, and special characters.

For example, LAG1

This parameter specifies the LAG name.

LAG Type

Static, Manual

Default value: Static

This parameter specifies the LAG type.

Value description:
  • Static: In static link aggregation, a user creates a LAG and Link Aggregation Control Protocol (LACP) is started if a member port is added or deleted. Member ports in a LAG may be in selected, standby, or unselected state. The devices at both ends exchange LACPDUs and negotiate ports and links to be aggregated.
  • Manual: In manual link aggregation, a user creates a LAG and LACP is not started if a member port is added or deleted. Member ports of a manual LAG may be in up or down state. The system determines whether to perform link aggregation depending on the physical port status (up or down), working mode, and port rate.
Recommendations:

The devices at both ends of a LAG must use the same link aggregation mode.

It is recommended that you set this parameter to Static because a static LAG provides higher link reliability than a manual LAG. Set this parameter to Manual when the equipment is interconnected with equipment that does not support LACP. For a manual LAG, it is recommended that you configure IEEE 802.3ah OAM to monitor the link status and enable both ends to perform a LAG switchover once a unidirectional fiber cut is detected.

Link Detection Protocol

Null, 3ah

Default value: Null

This parameter specifies whether the link monitoring protocol is used for a LAG.

Value description:
  • Null: No link monitoring protocol is used for a manual LAG.
  • 3ah: IEEE 802.3ah is used as a link monitoring protocol for a manual LAG.
Recommendations:

The value 3ah is recommended if the interconnected device supports IEEE 802.3ah. This ensures that services are switched to the same link at both ends. An ETH_EFM_DF alarm detected by an active LAG member triggers a LAG switchover.

Revertive

Revertive, Non-revertive

Default value: Revertive

This parameter specifies whether services are switched back to member links with higher priorities after these links recover from faults.

Impacts on the system:

If you set this parameter to Revertive, services will be switched back to the member link with a higher priority after it recovers from faults. A LAG switchover will cause services to be unavailable for not more than 500 ms.

Value description:
  • Revertive: Services will be switched back to the member link with a higher priority after the link recovers from faults.
  • Non-Revertive: Services will not be switched back to the member link with a higher priority after the link recovers from faults. Services will be switched back only after the member link that is carrying the services fails.
Recommendations:

For a manual LAG, if IEEE 802.3ah OAM is not used for monitoring the LAG status and this parameter is set to Revertive, services will be interrupted when a unidirectional fiber cut occurs.

This parameter value must be the same at both ends of a LAG.

Association with other parameters:

This parameter can be set only after Load Sharing is set to Non-Sharing.

Load Sharing

Non-Sharing, Sharing

Default value: Non-Sharing

This parameter specifies whether more than one port is used to carry traffic when a LAG has several member ports.

Value description:
  • Sharing: Each member link in a LAG carries traffic. That is, the member links in the LAG share the load. The sharing mode increases Ethernet link bandwidth. When a member in a LAG changes or a link fails, the traffic is re-allocated automatically.
  • Non-Sharing: Only one member link of a LAG carries traffic and the other member link is in standby state. In this case, a link hot backup mechanism is provided. When the active link of a LAG is faulty, the system activates the standby link to transmit service traffic.
Recommendations:

It is recommended that you set this parameter to Non-Sharing when a LAG is expected to provide link protection. It is recommended that you set this parameter to Sharing when a LAG is expected to increase link bandwidth.

For a manual LAG, both ends must use the same load sharing mode; otherwise, services will be interrupted.

Association with other parameters:

If Load Sharing is set to Sharing, Revertive and WTR Time (min) cannot be set.

Load Sharing Hash Algorithm

-

This parameter specifies the load sharing algorithm used at member ports in a LAG.

System Priority

0 to 65535

Default: 32768

This parameter specifies the LAG priority at the local end.

Impacts on the system:

When a local LAG negotiates with an opposite LAG through LACPDUs, both LAGs can obtain the system priorities of each other. The LAG with the lower system priority changes its link aggregation information to be consistent with that of the LAG with the higher system priority. If the LAG priorities at both ends are the same, the system MAC addresses are compared. The LAG with the larger system MAC address changes its link aggregation information to be consistent with that of the LAG with the smaller system MAC address.

Recommendations:

The smaller the value, the higher the system priority.

Association with other parameters:

This parameter can be set only after LAG Type is set to Static.

Ports that are preferred to carry services are determined by System Priority and Port Priority. System Priority precedes Port Priority.

WTR Time (min)

0 to 30

Default: 10

This parameter specifies the time for services to wait before being switched from the standby link to the master link that has recovered from faults. An appropriate WTR time prevents possible link status changes from resulting in frequent LAG switchovers.

Recommendations:

It is recommended that you set this parameter to 10.

WTR Time (min) needs to be set at both ends of a LAG. The actual WTR time of an NE is the smaller one of the values for both ends.

In a LAG, if the WTR Time (min) is set to 0 or disabled at one end, the WTR Time (min) is disabled for the LAG.

WTR Time (min) settings apply only to interworking of non-load sharing LAGs. In other scenarios, it is recommended that you set WTR Time (min) to 0.

Association with other parameters:

This parameter can be set only after Revertive is set to Revertive.

Packet Receive Timeout Period

Short period, Long period

Default: Long period

This parameter specifies the timeout duration for a port to receive LACP Packets If the port fails to receive any LACP packets for over three consecutive intervals at which protocol packets are sent, the equipment will deem that the link is unavailable and therefore trigger protection switching.

  • Short period: The interval at which LACP packets are sent is 1s. The timeout duration of receiving LACP packets is 3s.
  • Long period: The interval at which LACP packets are sent is 30s. The timeout duration of receiving LACP packets is 90s.

Recommendations:

When LAG equipment at two ends transmits LACP packets through an intermediate network, Packet Receive Timeout Period is recommended to be set to Short period. For other circumstances, Short period is recommended to avoid unnecessary switching.

Association with other parameters:

Packet Receive Timeout Period can be set only when LAG Type is set to Static.

LAG Min Active Link Threshold

1 to total number of members in a LAG

Default: 1

The equipment will deem that the LAG fails if LAG Min Active Link Threshold has been set and the number of LAG ports in working mode is less than the threshold.

Recommendations:

  • When there are both LAG and other protection (such as LPT), set LAG Min Active Link Threshold to the total number of LAG members if the equipment determines an LAG failure when some LAG member links fail and triggers protection switching.
  • If the equipment determines an LAG failure when all LAG member links fail, set LAG Min Active Link Threshold to 1.
Association with other parameters:

This parameter can be set only after Load Sharing is set to Sharing.

Table 5-4 Port parameters

Parameter

Value Range

Description

Main Board

Slot ID-board name

For example, 2-EG6P

This parameter specifies the master board in a LAG.

Recommendations:

Set this parameter according to the plan.

Main Port

Port number (PORT-number)

For example, 1 (PORT-1)

This parameter specifies the master port in a LAG. The master port represents the LAG. A LAG contains only one master port. All LAG attributes, such as MAC addresses and IP addresses, are actual the attributes of the master port. In addition, all services carried by the LAG are configured on the master port.

Recommendations:

Among all the ports to be added to a LAG, only one port is allowed to have been configured with services and this port must be configured as the master port; if none of these ports is configured with services, each port can be configured as the master port.

Set this parameter according to the plan.

Board

Slot ID-board name

For example, 2-EG6P

This parameter specifies the standby board in a LAG.

Recommendations:

Set this parameter according to the plan.

Port

Slot ID-board name-port number (PORT-number)

For example, 2-EG6P-2 (PORT-2)

This parameter specifies the standby port in a LAG. All ports other than the master port in a LAG are standby ports.

Standby ports may also be used to carry traffic.

Recommendations:

Set this parameter according to the plan.

Selected Standby Ports

Slot ID-board name-port number (PORT-number)

For example, 2-EG6P-2 (PORT-2)

This parameter displays the selected standby ports.

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Updated: 2019-04-26

Document ID: EDOC1100021621

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