About Circuit-ID Tunnels
Circuit-ID tunnels are used to route traffic between two clusters. The traffic is tapped and sent through network ports that are configured on the cluster in the encapsulation side. Based on the flow map configuration, traffic is filtered and then sent through the circuit ports that are configured as the destination port in the map. These circuit ports encapsulate the traffic with a circuit-ID and transmit the encapsulated traffic through the circuit tunnel that connects two clusters. At the receiving end of another cluster in the decapsulation side, the circuit port that is configured as the source port decapsulates the traffic and sends the traffic to the appropriate tools through the tool ports.
Figure 582: Circuit Flow Mapping illustrates the circuit flow mapping between two clusters using circuit-ID.
Figure 582: Circuit Flow Mapping
In this example, the GigaVUE-TA Series and GigaVUE-HC Series nodes reside in cluster A. The tapped traffic is sent through network ports, 1/1/n1 and 1/1/n2. Based on the rules configured in the map, the traffic is filtered at the nodes in cluster A. The filtered traffic is then sent through the circuit port, 1/1/g1 and circuit GigaStream that are configured as the destination port in the map. These circuit ports encapsulate the traffic with circuit-ID and transmit the encapsulated traffic through the circuit tunnel that connects cluster A and cluster B. At the receiving end of cluster B, the circuit ports, 1/1/g2, 1/1/g3, 1/1/g4, and 1/1/g5 that are configured as the source ports decapsulate the traffic, strip the circuit-ID, and send the traffic to the appropriate tools through the tool ports, 1/1/x1, 1/1/x2, and 1/1/x3.
Refer to the following sections for details about the Circuit-ID tunnel encapsulation and decapsulation:
| • | Circuit-ID Tunnels—Rules and Notes |
| • | Circuit-ID Tunnel Encapsulation |
| • | Circuit-ID Tunnel Decapsulation |
MORE INFORMATION 
