GigaSMART IP Encapsulation/Decapsulation (GigaSMART Tunnel)

Required License for IP Decapsulation: Base (GigaVUE‑HC2, and GigaVUE‑HC3), Tunneling (GigaVUE‑HC1)Required License for IP Encapsulation: Advanced Tunneling (GigaVUE‑HC2, and GigaVUE‑HC3), Tunneling (GigaVUE‑HC1)

Use GigaSMART encapsulation and decapsulation operations to send traffic arriving on one GigaSMART-enabled node over the Internet to a second GigaSMART-enabled node. There, the traffic is decapsulated and made available to local tool ports.

This feature is useful when instrumenting remote data centers – you can tunnel selected portions of the traffic from the remote GigaSMART-enabled node to tools in a central location. Traffic is encapsulated at the sending end of the tunnel and decapsulated at the receiving end.

GigaSMART drops packets when it receives packets with multiple encapsulation headers that are added due to unpredictable looping in the network.

IP fragmentation and reassembly are supported. Refer to IP Fragmentation and Reassembly on L2GRE and GMIP Tunnels.

The source leader in a bidirectional clock relationship (formerly master) of the GigaSMART tunnel can be any of the following:

■   GigaSMART-Enabled GigaVUE H Series Node
o   Standalone GigaVUE‑HC3 node with SMT-HC3-C05 modules installed.
o   Standalone GigaVUE‑HC2 node with GigaSMART-HC0 front and/or rear modules installed.
o   Standalone GigaVUE‑HC1 nodes.
o   Any GigaVUE H Series node operating in a cluster with the previous node types.
■   GigaVUE-2404 G Series node with a GigaSMART-6X line card installed
■   GigaVUE V Series node or a GigaVUE-VM

Note:  You can also create GigaSMART operations that allow a GigaVUE H Series node to act as the receiving end of an ERSPAN tunnel for data mirrored over the Internet from Cisco equipment. However, this feature requires the Advanced Tunneling license; refer to GigaSMART ERSPAN Tunnel Decapsulation.