Adding Delta switches instructions and pointer to Delta AG7648 OFDPA

Change-Id: I8ba6abd1b39920520992ec1a809901053456f77a
diff --git a/fabric-setup.md b/fabric-setup.md
index 4fb19b6..7c480b8 100644
--- a/fabric-setup.md
+++ b/fabric-setup.md
@@ -17,6 +17,23 @@
 
 **Checksum**: *sha256:2db316ea83f5dc761b9b11cc8542f153f092f3b49d82ffc0a36a2c41290f5421*
 
+### Instructions to install ONL on Delta Switches
+
+If the Delta switch you are using has the following in /etc/machine.conf:
+```shell
+onie_platform=x86_64_<platform name>-r0
+onie_machine=<platform name>
+```
+Please change it to the following before installing ONL:
+```shell
+onie_platform=x86_64-delta_<platform name>-r0
+onie_machine=delta_<platform name>
+```
+After the installation of ONL, if you don't see '/usr/bin' in your PATH variable, please run the following command:
+```shell
+export PATH=$PATH:/usr/bin/ofdpa
+```
+
 Guidelines on how to install ONL on top of an ONIE compatible device can be found directly on the [ONL website](https://opennetlinux.org/docs/deploy).
 
 This specific version of ONL has been customized to accept an IP address through DHCP on the management interface, *ma0*. If you'd like to use a static IP, first give
@@ -41,13 +58,13 @@
 ```shell
 dpkg -i your-ofdpa.deb
 ```
-
 Three OFDPA drivers are available:
 
 * [EdgeCore 5712-54X / 5812-54X / 6712-32X](https://github.com/onfsdn/atrium-docs/blob/master/16A/ONOS/builds/ofdpa_3.0.5.5%2Baccton1.7-1_amd64.deb?raw=true) - *checksum: sha256:db228b6e79fb15f77497b59689235606b60abc157e72fc3356071bcc8dc4c01f*
 * [EdgeCore 7712-32X](https://github.com/onfsdn/atrium-docs/blob/master/16A/ONOS/builds/ofdpa_3.0.5.5%2Baccton1.7-1_amd64.deb) - *checksum: sha256:4f78e8f43976dc86ab1cdc2f98afa743ce2e0cc5923e429c91f96b0edc3ddf4b*
 * [QuantaMesh T3048-LY8](https://github.com/onfsdn/atrium-docs/blob/master/16A/ONOS/builds/ofdpa-ly8_0.3.0.5.0-EA5-qct-01.01_amd64.deb?raw=true) - *checksum: sha256:f8201530b1452145c1a0956ea1d3c0402c3568d090553d0d7b3c91a79137da9e*
 * [QuantaMesh BMS T7032-IX1/IX1B](https://github.com/onfsdn/atrium-docs/blob/master/16A/ONOS/builds/ofdpa-ix1_0.3.0.5.0-EA5-qct-01.00_amd64.deb?raw=true) *checksum: sha256:278b8ffed8a8fc705a1b60d16f8e70377e78342a27a11568a1d80b1efd706a46*
+* [Delta AG7648](https://github.com/onfsdn/atrium-docs/blob/master/16A/ONOS/builds/ofdpa-ag7648_0.3.0.5.6_amd64.deb?raw=true) *checksum: sha256:ddfc13cb98ca47291dce5e6938b1d65f0b99bbe77f0585e36ac0007017397f23*
 
 ## Connect the Fabric Switches to ONOS
 
@@ -72,3 +89,10 @@
 ```
 
 > NOTE: It may take a few seconds for the switches to initialize and connect to ONOS
+
+### Additional notes for Delta switches
+
+If optical sfp cables are not coming up, please use the following command to launch ofdpa:
+```shell
+./launcher ofagentapp -t <ip address of the controller>
+```