Encapsulation Overview
Learn about encapsulating packets with
Generic Routing Encapsulation (GRE) headers. GRE provides a private secure path for
transporting packets.
You can configure the NPB application to encapsulate outgoing packets with tunnel and L2/L3 parameters.
The following L2/L3 parameter configurations are required for GRE
encapsulation:
- Outer destination MAC address
(mandatory)
- Outer source MAC address
(mandatory)
- Outer VLAN Tag (optional)
- Outer VLAN PCP (optional)
- Outer Source IPv4 address
(mandatory)
- Outer Destination IPv4 address
(mandatory)

Note
- Only IPv4 GRE encapsulation is
supported in NPB application.
- All flags in GRE encapsulation
header are set to 0.