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

Configuration Guide - IP Unicast Routing

S7700 and S9700 V200R013C00

This document describes the configurations of IP Unicast Routing, including IP Routing, Static Route, RIP, RIPng, OSPF, OSPFv3, IPv4 IS-IS, IPv6 IS-IS, BGP, Routing Policy, IP Routing Table Management, and PBR.
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).
IS-IS Reliability

IS-IS Reliability

As networks develop, services have higher network requirements. IS-IS provides high reliability to ensure uninterrupted service forwarding when a network fault occurs or when network devices need maintenance.

IS-IS reliability includes hot standby, batch backup, real-time backup, BFD for IS-IS, and IS-IS GR.

In hot standby, IS-IS backs up data from the Active Main Board (AMB) to the Standby Main Board (SMB). Whenever the AMB fails, the SMB becomes active and takes over the tasks of the AMB to ensure normal IS-IS running. This improves IS-IS reliability.

IS-IS information backup includes data backup and command line backup:
  • Data backup: The system backs up data of processes and interfaces.

    Data backup ensures the same IS-IS data on the AMB and SMB. When an AMB/SMB switchover occurs, neighbors do not detect the switchover.

  • Command line backup: The system backs up the command lines that are successfully executed on the AMB to the SMB.

    Whether to send command lines to the SMB for processing is determined by the execution results of command lines on the AMB. If command lines are successfully executed on the AMB, the command lines are sent to the SMB for processing. Otherwise, the command lines are not sent to the SMB and the command line execution failure is logged. If the command lines fail to be executed on the SMB, this failure is logged.

    The AMB sends only the successfully executed command lines to the SMB for processing. If a fault occurs on the AMB, IS-IS neighbor relationships on the device need to be established again after the AMB/SMB switchover is performed.

Hot Standby

Devices with distributed architecture support IS-IS hot standby.

In IS-IS hot standby, IS-IS configurations on the AMB and SMB are consistent. When an AMB/SMB switchover occurs, the new AMB performs GR and resends a request for establishing neighbor relationships to neighbors to synchronize its LSDB. This prevents traffic transmission from being affected.

Batch Backup

  • Batch data backup

    When the SMB is installed, all data of the AMB is backed up to the SMB at a time. No configuration can be changed during batch backup.

  • Batch command line backup

    When the SMB is installed, all configurations of the AMB are backed up to the SMB at a time. No configuration can be changed during batch backup.

Real-Time Backup

  • Real-time data backup

    Changed data of processes and interfaces is backed up in real time to the SMB.

  • Real-time command line backup

    The command lines that are executed successfully on the AMB are backed up to the SMB.

Translation
Download
Updated: 2019-04-08

Document ID: EDOC1100065744

Views: 64535

Downloads: 50

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