Mechanisms for solving an IP fragmentation overlapping issue in L2VPN using multiple IP addresses in GRE headers

One or more non-transitory computer-readable storage media storing one or more computer instructions which, when executed by one or more processors, cause the one or more processors to perform:

• receiving, by an edge service gateway, a packet that requires fragmentating;
• determining whether the edge service gateway is configured to prevent Internet Protocol Identifier (“IPID”) fragmentation overlapping;
• in response to determining that the edge service gateway is configured to prevent IPID fragmentation overlapping:
• creating a plurality of packet fragments based on, at least in part, the packet;
• wherein a packet fragment of the plurality of packet fragments:
• comprises a Generic Routing Encapsulation (“GRE”) IP header, one or more additional headers, and a portion of the packet;
• stores an IPID generated for the packet in an IPID field in the GRE IP header;
• stores a source private IP address in a source IP address field in the GRE header;
• stores a destination private IP address in a destination IP address field in the GRE header;
• and
• wherein the source private IP address, the destination private IP address and the IPID collectively form a packet identifier of the packet.

An edge service gateway implemented in a computer network and configured to implement mechanisms for using multiple IP addresses in Generic Routing Encapsulation (“GRE”) IP headers to prevent Internet Protocol Identifier (“IPID”) fragmentation overlapping in L2VPN networks, the edge service gateway comprising:

• one or more processors;
• one or more memory units;
• and
• one or more non-transitory computer-readable storage media storing one or more computer instructions which, when executed by the one or more processors, cause the one or more processors to perform:
• receiving, by an edge service gateway, a packet that requires fragmentating;
• determining whether the edge service gateway is configured to prevent IPID fragmentation overlapping;
• in response to determining that the edge service gateway is configured to prevent IPID fragmentation overlapping:
• creating a plurality of packet fragments based on, at least in part, the packet;
• wherein a packet fragment of the plurality of packet fragments:
• comprises a GRE IP header, one or more additional headers, and a portion of the packet;
• stores an IPID generated for the packet in an IPID field in the GRE IP header;
• stores a source private IP address in a source IP address field in the GRE header;
• stores a destination private IP address in a destination IP address field in the GRE header;
• and
• wherein the source private IP address, the destination private IP address and the IPID collectively form a packet identifier of the packet.