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Configuration Guide - Virtualization
CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of virtualization, including stack and SVF.

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Stack Connection Mode

Stack Connection Mode

Connection Mode

Stack members can be connected through stack member ports that are bundled into stack ports. Figure 1-8 shows the two types of ports.
Figure 1-8 Stack ports
  • Stack member port

    A stack member port is a physical port in stack mode and used to connect stack members.

  • Stack port

    A stack port is a group of stack member ports that are bundled into a single logical port exclusively used for stacking. Multiple stack member ports can be bundled into a stack port to improve stack link bandwidth and reliability.

    Each switch supports two stack ports: Stack-Portn/1 and Stack-Portn/2, where n is the stack member ID of the switch.

Connection Topologies

There are two types of stack connection topologies: chain topology and ring topology, as shown in Figure 1-9. Table 1-1 compares the two connection topologies in terms of reliability, link bandwidth efficiency, and network cabling.
Figure 1-9 Stack connection topologies
Table 1-1 Comparisons of stack connection topologies

Connection Topology

Advantages

Disadvantages

Use Scenario

Chain topology

Long-distance stacking: The first and last stack members do not need to be physically connected.

  • Low reliability: If a stack link fails, the stack splits.

  • Low stack link bandwidth efficiency: The stack relies on one path.

Stack members are far from one another and a ring topology is difficult to deploy.

Ring topology

  • High reliability: If a stack link fails, the topology changes from ring to chain, allowing the stack to function normally.

  • High stack link bandwidth efficiency: Data can be forwarded along the shortest path.

The first and last member switches need to be physically connected, which makes long-distance stacking difficult.

Stack members are located near one another.

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Updated: 2020-03-17

Document ID: EDOC1100075367

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