Encapsulation modes for encapsulating packet services into ODUk signals on the HUNQ2 board

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Both the GFP-F and GFP-T modes can be used to encapsulate packet services on the HUNQ2 board into ODUk signals. The GFP-T mode is used to encapsulate services into ODU0 signals only.

Other related questions:
Service encapsulation modes supported by the TN52TOG board
The TN52TOG board can encapsulate GE services into GE(TTT-GMP) or GE (GFP-T) services.

GRE packet encapsulation process on the USG6000
1. Upon receiving an IP packet over an interface connected to the IP network, the firewall enables the IP processing part to process the IP packet. 2. The IP processing part checks the destination address in the packet header to determine the forwarding mode. If the packet needs to pass through the GRE tunnel to arrive at the destination, the IP processing part sends the packet to the corresponding tunnel interface. 3. Upon receiving the packet, the tunnel interface encapsulates the packet with a GRE packet header and then returns the packet to the IP processing part. 4. The IP processing part encapsulates the GRE packet with a new IP packet header (the source address is the tunnel source interface IP address and the destination address is the tunnel destination interface IP address), and forwards the encapsulated IP packet over the physical port connected to the Internet based on the destination address and routing table.

Advantages of the TTT-GMP and GFP-T encapsulation modes for GE services
The TTT-GMP encapsulation mode can better support synchronous Ethernet, and GFP-T can transparently transmit data packets with low latency.

Whether the OTU4, ODU4, and OPU4 encapsulation modes are different from other OTN encapsulation modes
The OTU4, ODU4, and OPU4 encapsulation modes are different from other OTN encapsulation modes. OTU4 rate = (255/227) x (10 x 9.95328) ODU4 rate = OTU4 x 239/255 Rate in the OPU4 payload area = OTU4 x 238/255 100GE signals are mapped into the OPU4 payload area in GMP mode that does not use OPU3, OPU2, or OPU1 padding bytes.

Whether the HUNQ2 board supports ODUk SNCP
The HUNQ2 board supports ODUk SNCP in most scenarios, but does not support ODUk SNCP or ODUk SPRing protection when the board receives SDH or packet services from the backplane.

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