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

CloudEngine 8800, 7800, 6800, and 5800 V200R002C50 Configuration Guide - Virtualization

This document describes the configurations of virtualization, including stack and SVF.
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).
SVF System Merging and Splitting

SVF System Merging and Splitting

SVF System Merging

Two SVF systems merge when their parent switches merge into one stack, as shown in Figure 2-11. Parent switches of SVF-1 and SVF-2 compete for the master role. If the parent switch of SVF-2 fails the competition, SVF-2 restarts and rejoins SVF-1. In this situation, the SVF configuration will be lost. If SVF-1 has the offline configuration of SVF-2, leaf switches of SVF-2 can still join the merged SVF. Otherwise, these leaf switches cannot join the merged SVF.
Figure 2-11 Merging of two SVF systems

SVF System Splitting

Similarly, an SVF system splits when the stack of the parent switches splits, as shown in Figure 2-12. When the stack link between the parent switches fails, the stack of the parent switches splits. As a result, the SVF system also splits.

If a leaf switch connects to more than one parent switch, it may connect to two SVF systems after the original SVF system splits. The following situations occur:
  • If batch backup between two parent switches is not finished, the leaf switch's port connected to the standby parent switch is blocked.

  • If batch backup between two parent switches is finished, the leaf switch's port connected to the master parent switch is blocked.

Figure 2-12 Splitting of an SVF system
If the dual-active detection (DAD) function is configured, two SVF systems compete after the stack splits. The parent switch and leaf switches in the SVF system that fails the competition shut down all their service ports except the reserved ports. The two SVF systems compare the following in the listed order (the comparison ends when a winning SVF system is found):
  1. Number of leaf switches: The SVF system with a larger number of leaf switches wins.

  2. Parent switch stack priority: The SVF system with a higher parent switch stack priority wins.

  3. Parent switch MAC address: The SVF system with a smaller parent switch MAC address wins.

For details about DAD, see "Stack Split and Dual-Active Detection" in the CloudEngine 8800, 7800, 6800, and 5800 Series Switches Configuration Guide - Virtualization - Stack Configuration.

NOTE:

It is recommended to configure DAD on the ports of the parent switch. If DAD is configured on the ports of a leaf switch, the leaf switch may be still connects to the same parent switch when the leaf switch is dual-homed to two parent switches and the stack of the parent switches splits. In this situation, split detection cannot be performed.

When the system split recovers, the two parent switches merge into one stack and compete for the master role. The parent switch that fails the competition and the leaf switches attached to this parent switch restart and rejoin the SVF system. The SVF system then recovers.

Translation
Download
Updated: 2019-04-20

Document ID: EDOC1000166645

Views: 54830

Downloads: 344

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