Cisco Cisco DWDM Transceiver Modules 白皮書

 

 

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The Cisco Nexus 9000 Series includes support for the Cisco Nexus plug-in for OpenStack Networking (Neutron). 

The plug-in allows customers to easily build their infrastructure-as-a-service (IaaS) networks using the industry's 

leading networking platform, delivering performance, scalability, and stability with familiar manageability and 

control. The plug-

in helps bring operation simplicity to cloud network deployments. OpenStack’s capabilities for 

building on-demand self-serve multitenant computing infrastructure are well known. However, implementing 

OpenStack's VLAN networking model across virtual and physical infrastructures can be difficult. 

OpenStack Networking provides an extensible architecture that supports plug-ins for configuring networks directly. 

However, each network plug-in enables configuration of only that plug-

in’s target technology. When OpenStack 

clusters are run across multiple hosts with VLANs, a typical plug-in configures either the virtual network or the 

physical network, but not both. 

The Cisco Nexus plug-in solves this problem by enabling the use of multiple plug-ins simultaneously. A typical 

deployment runs the Cisco Nexus plug-in in addition to the standard Open vSwitch (OVS) plug-in. The Cisco 

Nexus plug-in accepts OpenStack Networking API calls and directly configures Cisco Nexus switches as well as 

OVS running on the hypervisor. Not only will the Cisco Nexus plug-in configure VLANs on both the physical and 

virtual network, but it also intelligently allocates VLAN IDs, deprovisioning them when they are no longer needed 

and reassigning them to new tenants whenever possible. VLANs are configured so that virtual machines running 

on different virtualization (computing) hosts that belong to the same tenant network transparently communicate 

through the physical network. Moreover, connectivity from the computing hosts to the physical network is trunked 

to allow traffic only from the VLANs configured on the host by the virtual switch (Figure 10). 

Figure 10.    Cisco OpenStack Neutron Plug-in with Support for Cisco Nexus 9000 Series Switches