GRE SDP tunnel fragmentation and reassembly is supported in conjunction with NGE. Encryption is applied to the GRE SDP (NGE) tunnel packet before fragmentation on egress and not to each fragment. Decryption occurs after the GRE SDP (NGE) tunnel packet is reassembled by the BB-ISA application and returned to base routing for processing.
GRE SDP tunnel reassembly is supported when the GRE SDP tunnel terminates on the router interface IP address. See GRE SDP termination on router interface IP address for information about GRE SDP termination on a router interface IP address.