Users Guide

Connectivity
If a network server is not reachable, a log message displays and the VSN agent tries periodically to establish the connection with the
hypervisor.
The initial log message is:
Xen-Citrix:Connection error for hypervisor testing:LOGIN FAILURE
If connectivity to a hypervisor is lost after information is retrieved and used to recongure a switch, the following log message displays. The
VSN agent tries to connect to the hypervisor in the background. The information that was retrieved from the hypervisor is not deleted.
Xen-Citrix:Lost connection to hypervisor xen217. Retrying...
Afterward, one of the following actions performs:
• If connectivity with the hypervisor is re-established within three minutes after the loss of connectivity, the following log message
displays and the retrieved information is retained:
Xen-Citrix:Reestablished connection with hypervisor xen217.
• If connectivity with the hypervisor is not re-established within three minutes after the loss of connectivity, the following log message
displays. The information retrieved from the hypervisor is deleted and the VLANs from the hypervisor are uncongured:
Xen-Citrix:Lost connection to hypervisor xen217. Removing learnt
information.
Running VSN Scripts
The VSN package contains the SDKs for VMware and Citrix Xen hypervisors.
The Perl and Python scripts required for VSN functionality are stored with the VSN package in the /usr/pkg/scripts/VSNAgent
directory as follows:
• For VMware hypervisors, the Perl script is stored is at /usr/pkg/scripts/VSNAgent/VMWare/VSNAgent.pl.
• For Citrix Xen hypervisors, the Python script is stored is at /usr/pkg/scripts/VSNAgent/Xen/hpAgtMain.py
CAUTION
: The Dell Open Automation Virtual Server Networking™ software package (the “Product”) may contain the VMware
SDK for Perl, which is licensed by VMware, Inc. VMware will not provide technical support for the VMware SDK included in the
Product. Users interested in writing scripts for VMware products must obtain the VMware SDK directly from VMware. You may
not create scripts for VMware products through use of the VMware SDK included in the Virtual Server Networking package. End
Users may use the Dell Virtual Server Networking according to the terms, conditions, and limitation of the pertinent Dell End
User License Agreement only.
To run a VSN script (Perl or Python) in all connected hypervisor sessions to retrieve virtual server congurations and update Dell EMC
Networking OS settings on the switch, enter the script command in Conguration mode.
• Run a VSN script in active sessions on VMware and Xen hypervisors.
CONFIGURATION mode
script script-name
For script-name, enter the directory path and lename where you stored the VSN script on the switch; for example:
script/usr/pkg/ scripts/VSNAgent/VMWare/VSNAgent.pl.
To stop a VSN script that is running, enter the no version of the script script-name command; for example: no
script /usr/pkg/scripts/VSNAgent/VMWare/VSNAgent.pl.
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Virtual Server Networking