The last step for this basic lab environment is to create routing to connect the External and Internal realms.
In Oracle SBCs this kind of configuration is called Policy Realm Based Realm Bridging.
To configure this routing, we need to create 2 local policies, indicating the source realm and destination realm, let’s go to the CLI:
Save and apply the changes.
Before starting to test, its important to mention that the management (Home Network) was disconnected as the Linphone application binds this interface for audio/RTP. Try calling Bob using Oracle SBC IP address 192.168.200.1 as the domain as shown below:
Using IP address 192.168.200.1 will force the SIP signaling and audio/RTP traffic to be sent to the SBC, this can be verified using Wireshark.
In Ubuntu External (Alice-External) capture shows traffic:
There are two things that we can highlight from the previous image:
- All signaling communication was using the SBC IP address 192.168.200.1
- RTP traffic on the SBC side is using port 20004 which was configured in the External steering pool
In Ubuntu Internal (Bob-Internal) capture shows traffic:
This complete the creation of the lab environment, this will help us to go deeper with advanced configuration in Oracle SBCs.