No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

CLI-based Configuration Guide - Ethernet Switching

AR650, AR1600, and AR6100 V300R003

This document describes how to configure the components for LAN services, including link aggregation groups, VLANs, voice VLANs, MAC address tables, transparent bridging, as well as GVRP, STP/RSTP, and MSTP protocols.
Rate and give feedback:
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).
Configuring the Preemption Mode

Configuring the Preemption Mode

Context

After the interface blocking mode is specified, whether a specified interface will be blocked is determined by the preemption mode. Table 12-12 lists the preemption modes.
Table 12-12  Preemption mode

Preemption Mode

Advantage

Disadvantage

Non-preemption mode

SEP is in non-preemption mode by default.

In this mode, blocking an interface does not disconnect any link in a SEP segment.

The blocked interface is one of the two interfaces that complete neighbor negotiations last.

Preemption mode

Delayed preemption

Each time a fault is rectified, the system automatically completes preemption and ensures that the specified interface is blocked.

  • The delayed preemption mode needs to be specified in advance. There is no default delay in preemption, and the delay time needs to be configured using a command.
  • After delayed preemption is configured successfully, a fault needs to be simulated to ensure that the specified interface is blocked.

Manual preemption

Whether the specified interface will be blocked can be controlled manually.

  • The manual preemption mode needs to be specified in advance.

  • After a network fault is rectified and the preemption action is taken, manual preemption no longer takes effect.

    Manual preemption needs to be configured again to ensure that the blocked point can be moved to the specified point after the next fault is rectified. This increases the maintenance workload.

The following conditions must be met to trigger preemption:

  • The SEP segment topology is complete.

  • The primary edge interface or no-neighbor primary edge interface has been elected in the SEP segment.

  • The function of flexibly specifying a blocked interface is enabled on the device where the primary edge interface or no-neighbor primary edge interface resides.

Perform the following operations on the Layer 2 switching device where the primary edge interface or no-neighbor primary edge interface resides.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run sep segment segment-id

    A SEP segment is created and the view of the SEP segment is displayed.

  3. Run preempt { manual | delay seconds }

    The preemption mode is configured on the primary edge interface.

    By default, no preemption mode is configured on the primary edge interface, that is, the non-preemption mode is used.

Download
Updated: 2019-04-12

Document ID: EDOC1100041791

Views: 57179

Downloads: 39

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next