Implementing Unidirectional and Bidirectional VirtualWire Links

In this section you can configure a single bidirectional VirtualWire link using the port-association-create command with the option virtual-wire . Each port of the VirtualWire transmits traffic in full-duplex mode.

Use the port-association-create command:

CLI(network-admin@Spine1) > port-association-create name name-string master-ports port-list slave-ports port-list virtual-wire|no-virtual-wire

port-association-create	Creates a port association between the master and slave ports.
name name-string	Specify the name of the configuration
master-ports port-list	Specify the master port number or a list of ports that can act as master ports.
slave-ports port-list	Specify the slave port number or a list of ports that can act as salve ports.
[virtual-wire\|no-virtual-wire]	Specify the virtual-wire keyword to form a virtual-wire port association. This command keyword creates two vFlows between the master and slave ports and re-directs all traffic from one port to another by creating a pseudo wire. It also creates a flow policy with Copy-to-CPU action on TCP packets (sync, ack, and rst) to provide analytics with tracking details. This keyword is available only when the switch is in VirtualWire mode.

Configuring a single bidirectional VirtualWire link using the port-association-create command with the option virtual-wire can be implemented in two ways that are functionally equivalent:

Configuring VirtualWire direction individually - or
Configuring a VirtualWire link using the bidir parameter

To configure a unidirectional VirtualWire link from device A to device B, enter the following command:

CLI (network-admin@Leaf1) > port-association-create name A-to-B virtual-wire master-ports 10 slave-ports 20 no-bidir

REST API Command: POST http://<switch-ip>/vRes/port-associations
{
“name”: “A-to-B”,
“virtual-wire”:”true”,
“master-ports”: “10”,
“slave-ports”: “20”
}

Note: Please note that the parameter “mode(?) must be set to “true”. This is the case when the switch is running in VirtualWire mode and you are configuring VirtualWire features.

To configure a unidirectional Virtual Wire link from device B to device A, enter the following command:

CLI (network-admin@Leaf1) > port-association-create name B-to-A virtual-wire master-ports 20 slave-ports 10

Note: If the bidir|no-bidir keywords are not mentioned in the above command, then, by default, a uni-directional association of VirtualWire link is configured.

REST API Command: POST http://<switch-ip>/vRes/port-associations
{
“name”: “B-to-A”,
“virtual-wire”:”true”,
“master-ports”: “20”,
“slave-ports”: “10”
}

To configure a bidirectional Virtual Wire link from device A to device B, enter the following command:

CLI (network-admin@Leaf1) > port-association-create name A-to-B bidir virtual-wire master-ports 10 slave-ports 20

REST API Command: POST http://<switch-ip>/vRes/port-associations
{
“name”: “A-to-B”,
“bidir”,
“virtual-wire”:”true”,
“master-ports”: “20”,
“slave-ports”: “10”
}

To display existing Virtual Wire links, use the port-association-show command:

CLI (network-admin@Leaf1) > port-association-show

switch name master-ports slave-ports policy virtual-wire bidir
--------- ------ ----------- ---------- ----------- ------------ -----
vw-switch A-to-B 10 20 all-masters true true

REST API Command: POST http://<switch-ip>/vRes/port-associations

To delete an existing Virtual Wire link, use the port-association-delete command with the name string parameter:

CLI (network-admin@Leaf1) > port-association-delete name A-to-B

REST API Command: POST http://<switch-ip>/vRes/port-associations/A-to-B