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S2700, S3700, S5700, S6700, S7700, and S9700 Series Switches Interoperation and Replacement Guide

This document provides typical configuration examples for interoperation between Huawei switches and mainstream IP phones, firewalls, routers, Microsoft NLB servers, multi-NIC servers, Cisco switches, and SolarWinds.
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VRRP and HSRP Interworking Analysis

VRRP and HSRP Interworking Analysis

Based on the HSRP principle, the destination MAC address of HSRP packets is different from that of VRRP packets. Therefore, the two protocols cannot interwork with each other. When Huawei switches replace Cisco devices, HSRP can only be replaced by VRRP with the following two replacement methods:
  • Replace HSRP with VRRP in Cisco devices before migration.
    1. Shut down Layer 3 interfaces on an HSRP standby device. Some downlink services are affected during this process, and service interruption time is equal to the route switching time.
    2. Change the configurations of the HSRP standby device to those of a VRRP master device and keep Layer 3 interfaces Down.
    3. Shut down Layer 3 interfaces on the HSRP active device, and enable Layer 3 interfaces on a VRRP master device to complete service switching.
    4. Change the configurations of the HSRP active device to those of a VRRP backup device, and enable Layer 3 interfaces to complete HSRP-to-VRRP switching.
    5. Migrate services of the VRRP backup device to the Huawei VRRP backup device.
    6. Migrate services of the VRRP master device to the Huawei VRRP master device.
  • Migrate downlinks on HSRP active and standby devices to Huawei VRRP master and backup devices.
    1. Before migration, ensure that there are network-side routes on Huawei devices to minimize the service loss after the service platform switching begins.
    2. Shut down downlink interfaces of the HSRP standby device, connect the physical cable to the VRRP master device, and keep interfaces Down.
    3. Shut down downlink interfaces of the HSRP active device, and immediately enable interfaces on the VRRP master device to complete service switching.
    4. Connect physical cables of the HSRP active device to the VRRP backup device, and enable interfaces on the VRRP backup device to complete the migration.

The first replacement method is not commonly used because service is interrupted for about 3 seconds during Step 3. Therefore, you are advised to use the second replacement method.

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Updated: 2019-05-15

Document ID: EDOC1000114005

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