Simulated Internet outage with a teams Survivable Branc Appliance.
The following Information is the minimum information you will need to test a single Windows Teams Client for survivability. You will need to update these values to reflect your environment.
| SBA | Value |
|---|---|
| SBA Fqdn | sba.audiocodes.cloud |
| SBA IP Address | 10.1.0.22 |
| SBA Subnet | 255.255.255.0 |
| SBA Gateway | 10.1.0.1 |
| SBC | Value |
|---|---|
| SBC Fqdn | sbc.audiocodes.cloud |
| SBC IP Address | 10.2.0.22 |
| SBC Subnet | 255.255.255.0 |
| SBC Gateway | 10.2.0.1 |
| SBC | Value |
|---|---|
| PC IP Address | 10.4.0.100 |
| PC Subnet | 255.255.255.0 |
| PC Gateway | 10.4.0.1 |
| PC DNS Server | 10.3.0.21 |
Assumptions
- To simplify testing you must only be logged into a single teams client, this guide assumes your are using a Windows PC.
- You have previously confirmed that the SBA is registring users correctly, and SBA syslogs look correct, for both OPTIONS and Inbound PSTN Forked calls.
- To modify the local routes on the Windows PC you will need to be a local administrator.
If you are unsure of the steps above follow This Guide
Step 1 - Current Status
-
Install Syslog Software on PC
-
Configure SBC to send Syslogs to PC
-
Ensure you are only logged into teams on a single Teams PC client. Ensure you have logged out of all other clients especially Browsers/Mobile/Tablet devices
-
Ping the SBC Fqdn
-
Ping the SBA Fqdn
-
Test an Inbound Call
-
Test an Outbound Call
-
If you can make and receive calls continue to step 2
Step 2 - Simulate Internet outage
- Log out and log back into the teams client.
- create routes to ensure that you can still ping the server when you remove the default gateway from PC. Do not create persistant routes.
# route for SBA
route add 10.1.0.22 MASK 255.255.255.255 10.4.0.1
# route for SBC
route add 10.2.0.22 MASK 255.255.255.255 10.4.0.1
# route for DNS Server
route add 10.3.0.21 MASK 255.255.255.255 10.4.0.1-
Manually change the IP Address on the PC so the default gateway is removed. ie in this example will be 10.4.0.100/255.255.255.0 with a DNS server of 10.3.0.21 only
-
Wait for the Teams client to go into survivability mode and continue to step 3.
Step 3 - Make Inbound /Outbound Calls
- Make a outbound PSTN Call, the call sould be successful.
- Make a inbound PSTN Call, the call should be successful.
- If calls in either direction are not successful follow this guide to troubleshootThis Guide.
- If both calls are successful continue to step 4.
Step 4 - revert PC settings
- Manually change the IP Address on the PC back to the original settings
- remove the static routes
# route for SBA
route delete 10.1.0.22
# route for SBC
route delete 10.2.0.22
# route for DNS Server
route delete 10.3.0.21- Wait for the MS Teams client to exit survivability mode.
- Make a outbound PSTN Call, the call sould be successful.
- Make a inbound PSTN Call, the call should be successful.