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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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SVF Topology

SVF Topology

The parent switch in an SVF system can be a standalone switch, as shown in Figure 2-6, or an iStack system consisting of two switches, as shown in Figure 2-7. Using a stack of two parent switches can implement redundancy on the control plane of the SVF system. If one parent switch fails, the other one can ensure normal operations of the SVF system.

For details about the iStack feature, see Stack Configuration in the CloudEngine 8800, 7800, 6800, and 5800 Series Switches Configuration - Virtualization Configuration Guide.

Figure 2-6 SVF system with a single parent switch
Figure 2-7 SVF system with a stack of two parent switches

Leaf switches connect to the parent switch through member ports of fabric ports. When two parent switches set up a stack, a leaf switch can connect to one parent switch (in single-homing mode) or two parent switches (in dual-homing mode). Servers can connect to leaf switches in active-active or active-standby mode. The active-active mode is recommended because it can implement load balancing.

In addition to setting up a stack of two parent switches, you can also set up a multichassis link aggregation group (M-LAG) between two SVF systems to ensure high reliability of server uplink traffic. As shown in Figure 2-8, after an M-LAG is set up between two SVF systems, servers can access leaf switches in the two SVF systems in active-active or active-standby mode.

For details about M-LAG, see M-LAG Configuration in the CloudEngine 8800, 7800, 6800, and 5800 Series Switches Configuration Guide.
NOTE:

The M-LAG function has been supported since V100R005C10.

Figure 2-8 SVF system with an M-LAG
Note that a leaf switch can connect to only the parent switches in the same SVF system. Figure 2-9 shows an example of incorrect connection. If a leaf switch connects to more than one SVF system, only the link connected to one of the SVF systems takes effect. (The link that becomes Up first takes effect.)
Figure 2-9 One leaf switch connecting to two SVF systems incorrectly
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Updated: 2019-04-03

Document ID: EDOC1100075367

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