Generic routing encapsulation over point-to-point protocol
AssigneeEricsson Inc.
InventorsChirayu Shah, Sanjay Rao
Life of this patent
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Abstract
A system and method are described herein that are capable of reducing overhead while keeping the traffic separation characteristics between two routers by establishing and using a generic routing encapsulation (GRE) tunnel directly over a link running a point-to-point protocol (PPP) that connects the two routers. Because, the system and method run GRE sessions directly over the PPP link means there is no need to configure the GRE tunnel over an Internet Protocol (IP) connection which means that outer IP header information does not need to be sent across the link. The elimination of the outer IP header reduces the overhead in the traffic sent between the two routers.
Claims22
A method for separating traffic between a first router and a second router that are connected to one another by a link running point-to-point protocol (PPP), said method comprising the steps of:
- receiving a packet at said first router from a first host;
- establishing a generic routing encapsulation (GRE) tunnel directly over the link between said first router and said second router;
- encapsulating and stripping-off an outer Internet Protocol (IP) header from the packet at said first router;
- sending the encapsulated packet using said GRE tunnel from said first router to said second router;
- decapsulating and processing the received packet at said second router;
- and
- forwarding the decapsulated packet from said second router to a second host.
A system comprising:
- a first router;
- a second router;
- said first router receives a packet from a first host and negotiates with said second router to establish a generic routing encapsulation (GRE) tunnel directly over a point-to-point protocol (PPP) link that is located between said first router and said second router;
- said first router also encapsulates and strips-off an outer Internet Protocol (IP) header from the packet and then sends the encapsulated packet using said GRE tunnel to said second router;
- and
- said second router receives, decapsulates, processes and then sends the decapsulated packet to a second host.
A router that receives a packet from a host and then negotiates with another router to establish a generic routing encapsulation (GRE) tunnel that is directly over a link running point-to-point protocol (PPP), which is located between both routers, before stripping-off an outer Internet Protocol (IP) header from the packet and sending the stripped packet within said GRE tunnel to said another router.
A router that receives, from another router, a packet which does not have an outer Internet Protocol (IP) and which is sent in a generic routing encapsulation (GRE) tunnel formed directly over a link running point-to-point protocol (PPP) that connects both routers.
Dependencies are inferred from the claim text.