GRE

The GRE (Generic Routing Encapsulation) layer encapsulates an inner IP/L2 flow in GRE over an outer IP header. Create the profile under Library → Network Tunnels and select it from the plugin's Network Tunnels group.

Table — GRE Layer Parameters

Name	Description	Value
Local IP	Outer source IP of the GRE tunnel	Local-end address
Remote IP	Outer destination IP	Peer/DUT address
Outer IP parameters	TTL, ToS, and related outer-header fields	According to testbed requirements

GRE can be combined with VLAN or IPsec in one library object; layer order determines which is outermost. To generate bulk raw GRE traffic without a library profile, use the separate GRE Flood Data Plane plugin. GRE Flood is a flood scenario, not a tunnel profile.