Lenovo Flex System Fabric CN4093, Application Manual

Page: 350 / 634

350
CN4093 Application Guide for N/OS 8.4
EVB Operations Overview
The ENOS includes a pre ‐ standards VSI Type Database (VSIDB) implemented
through the System Networking Switch Center (SNSC), the Lenovo Flex System
Manager (FSM), or the Lenovo System Networking Distributed Switch 5000V. The
VSIDB is the central repository for defining sets of network policies that apply to
VM network ports. You can configure only one VSIDB.
Note:
This document does not include the VSIDB configuration details. Please see
the SNSC, FSM, or Lenovo System Networking Distributed Switch 5000V guide for
details on how to configure VSIDB.
The VSIDB operates in the following sequence:
1.
Define VSI types in the VSIDB. The VSIDB exports the database when the CN4093
sends a request.
2.
Create a VM. Specify VSI type for each VM interface. See the SNSC, FSM, or
Lenovo System Networking Distributed Switch 5000V guide for details on how to
specify the VSI type.
The hypervisor sends a VSI ASSOCIATE, which contains the VSI type ID, to the
switch port after the VM is started. The switch updates its configuration based on
the requested VSI type. The switch configures the per ‐ VM bandwidth using the
VMpolicy.
The Enterprise NOS supports the following policies for VMs:
 ACLs
 Bandwidth metering
VSIDB Synchronization
The switch periodically checks for VSIDB changes based on the configured
interval. You can configure this interval using the following command:
To disable periodic updates, use the following command:
If the switch finds that the VSIDB has changed, it updates the local VSIDB cache.
When the cache is successfully updated, it sends a syslog message.
After updating the local VSIDB cache, the switch disassociates any VM whose type
ID or VLAN no longer exists in the updated cache.
CN 4093(config)# virt evb vsidb
<number>
CN 4093(conf-vsidb)# update-interval
<time in seconds>
CN 4093(conf-vsidb)# no update-interval