Verify Traffic Flow

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Verify Traffic Flow

To verify the traffic flow from client machine to server machine via vThunder, perform the following:

From Azure Portal > Azure services > Resource Group ><resource_group_name> > <active_virtual_machine_instance> > Settings > Networking.
Here, vth-inst1 is the active vThunder instance name.
Select the Datain NIC tab > IP configuration > vip. Here, Datain NIC is vth-inst1-datain-nic.
Copy the VIP address of the active vThunder instance.

Figure 42 : Active vThunder instance 1 VIP
Select your client instance from the Virtual machine list.
Here, vth-client is the client instance name.
SSH your client machine and run the following command using the copied VIP address to verify the traffic flow:
```
curl <vThunder_instance_datain-nic_vip>
```
Example
```
curl 10.0.2.5
```
Verify if a response is received.
After the switchover, vThunder instance 2 is active, copy the VIP address of the vThunder instance 2.

Figure 43 : Active vThunder instance 2 VIP

SSH your client machine and run the following command to verify the traffic flow:
```
curl <vThunder_instance_datain-nic_vip>
```
Example
```
curl 10.0.2.5
```
Verify if a response is received.
SSH your client machine and run the following command to verify the HTTP template traffic flow:
```
curl <vThunder_instance_datain-nic_vip>:<port_number>/<host-match-string or url-match-string>/
```
Example
```
curl 10.0.2.5:80/s1/
```
Verify if a response is received from client server (For example: Apache Index page).
SSH your client machine and run the following commands to verify the Persist cookie template traffic flow:
1. Verify the current cookie configuration:
```
curl --head <vThunder_instance_datain-nic_private_ip>
```
2. Run the following commands to save the cookies in the cookie.txt file:
```
curl -b cookie.txt -c cookie.txt <vThunder_instance_datain-nic_private_ip>
cat cookie.txt
```
  Example
```
curl --head 10.0.2.4
curl -b cookie.txt -c cookie.txt 10.0.2.4
cat cookie.txt
```

Run the following command on the active vThunder instance to view the persistence load-balancing statistics:

vThunder(config)#show slb persist

If the deployment is successful, the following summary persistence statistics is displayed:

                                    Total
-----------------------------------------------
URL hash persist (pri)               0
URL hash persist (sec)               0
URL hash persist fail                0
SRC IP persist ok                    0
SRC IP persist fail                  0
SRC IP hash persist(pri)             0
SRC IP hash persist(sec)             0
SRC IP hash persist fail             0
DST IP persist ok                    0
DST IP persist fail                  0
DST IP hash persist(pri)             0
DST IP hash persist(sec)             0
DST IP hash persist fail             0
SSL SID persist ok                   0
SSL SID persist fail                 0
Cookie persist ok                    1
Cookie persist fail                  0
Persist cookie not found             2
Persist cookie Pass-thru             0
Enforce higher priority              0

If the Persist-cookie configuration is successful, a value is displayed for the Cookie persist ok else the value is 0.