Service Access Design
A server can be connected to a VXLAN network as follows:
- (Recommended) A server connects to leaf nodes in active/standby mode, as shown in Figure 1.
- A server connects to the stack composed of leaf nodes through an Eth-Trunk, as shown in Figure 2.
- (Recommended) A server connects to the M-LAG composed of leaf nodes through an Eth-Trunk, as shown in Figure 3.
- Servers connect to the SVF composed of leaf nodes through Eth-Trunks, as shown in Figure 4.
Deployment Mode |
Characteristics |
Management |
Reliability |
Access Cost |
---|---|---|---|---|
(Recommended) A server connects to leaf nodes in active/standby mode. |
Leaf nodes are deployed independently, and dual NICs of the server are bound and connect to two leaf nodes in active/standby mode. Only one NIC receives and sends packets at one time, with low bandwidth usage. During switching of active and standby NICs, the VTEP IP address of received traffic changes. Then traffic is imported again when the server sends gratuitous ARP packets. |
Medium |
High |
Medium |
A server connects to the stack composed of leaf nodes through an Eth-Trunk. |
Two leaf nodes constitute a logical device through iStack and share a control plane, simplifying management. Dual NICs of a server are bound and work in active/standby or load balancing mode, with high bandwidth usage. However, the upgrade and maintenance of the logical device are complex. |
Low |
Medium |
Medium |
(Recommended) A server connects to the M-LAG composed of leaf nodes through an Eth-Trunk. |
Two leaf nodes are connected through a peer-link and constitute a DFS group. They function as one logical device, but have independent control planes. A server connects to the two leaf nodes in load balancing mode. The upgrade and maintenance are simple, and the reliability is high. The downlink interfaces of leaf nodes are configured with M-LAG and connected to the server. The dual NICs of the server work in active/standby or load balancing mode. Because leaf nodes have independent control planes, the configuration is complex. |
High |
High |
Medium |
Servers connect to the SVF composed of leaf nodes through Eth-Trunks. |
Two high-performance VXLAN-enabled leaf nodes are configured with iStack and connect to the SVF composed of low-cost leaf nodes. The leaf nodes provide low-cost 1G/10G VXLAN access. NICs of servers are dual-homed to two leaf nodes and work in active/standby or load balancing mode. |
Medium |
Low |
Low |