VPN router and VPN identification method by using logical channel identifiers
First Claim
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1. A router connected a core network, a first local area network (LAN) belonging to a first virtual private network (VPN), a second LAN belonging to a second VPN, a third LAN belonging to a third VPN and a fourth LAN belonging to a fourth VPN, comprising:
- a memory;
a first interface for accommodating a first line connected to the first LAN and the second LAN, and for receiving multiplexed IP packets from the first and the second LANs via the first line, the IP packets from the first and the second LANs being encapsulated by a first protocol;
a second interface for connected to the core network;
means for identifying which of the first VPN and the second VPN to which an IP packet received at the first interface belongs by header information of the first protocol; and
means for registering, in the memory, header information of the first protocol as a VPN identifier for identifying which of the first VPN and the second VPN to which an IP packet received from the first line belongs,wherein IP packets from the third and the fourth LANs being encapsulated by a second protocol different from the first protocol.
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Abstract
A VPN edge router with the ability of identifying VPNs by using the identifiers of logical channels multiplexed on a single input line.
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Citations
15 Claims
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1. A router connected a core network, a first local area network (LAN) belonging to a first virtual private network (VPN), a second LAN belonging to a second VPN, a third LAN belonging to a third VPN and a fourth LAN belonging to a fourth VPN, comprising:
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a memory; a first interface for accommodating a first line connected to the first LAN and the second LAN, and for receiving multiplexed IP packets from the first and the second LANs via the first line, the IP packets from the first and the second LANs being encapsulated by a first protocol; a second interface for connected to the core network; means for identifying which of the first VPN and the second VPN to which an IP packet received at the first interface belongs by header information of the first protocol; and means for registering, in the memory, header information of the first protocol as a VPN identifier for identifying which of the first VPN and the second VPN to which an IP packet received from the first line belongs, wherein IP packets from the third and the fourth LANs being encapsulated by a second protocol different from the first protocol. - View Dependent Claims (2, 3)
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4. A method of setting up a router connected to a core network, a first local area network (LAN) belonging to a first virtual private network (VPN), a second LAN belonging to a second VPN, a third LAN belonging to a third VPN and a fourth LAN belonging to a fourth VPN, wherein the router receives multiplexed IP packets from the first and the second LANs via a first line, the IP packets from the first and the second LANs being encapsulated by a firt protocol, receives IP packets from the third LAN via a second line and IP packets form the fourth LAN via a third line, the IP packets from the third and the fourth LANs being encapsulated by a second protocol different from the first protocol and has a memory, the method comprising the steps of:
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registering header information of the first protocol as a VPN identifier for identifying which of the first VPN and the second VPN to which an IP packet received from the first line belongs to the memory; registering physical interface numbers assigned to interface between the router and the second line and interface between the router and the third line as a VPN identifier for identifying which of the third VPN and the forth VPN to which an IP packet received either the second line or the third line belongs. - View Dependent Claims (5, 6)
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7. A method of setting up a router connected to a core network, a first local area network (LAN) belonging to a first virtual private network (VPN), a second LAN belonging to a second VPN, a third LAN belonging to a third VPN and a fourth LAN belonging to a fourth VPN, wherein the router receives multiplexed IP packets from the first and the second LANs via a first line, the IP packets from the first and the second LANs being encapsulated by a first protocol, the IP packets from the third and the fourth LANs being encapsulated by a second protocol different from the first protocol and has a memory, the method comprising the step of:
registering, in the memory, header information of the first protocol as a VPN identifier for identifying which of the first VPN and the second VPN to which an IP packet received from the first line belongs. - View Dependent Claims (8, 9)
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10. A router connected to a core network, a first Local Area Network (LAN) belonging to a first Virtual Private Network (VPN), a second LAN belonging to a second VPN, a third LAN belonging to a third VPN, and a fourth LAN belonging to a fourth VPN, comprising:
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means for receiving IP packets from the first and the second LANs being encapsulated by a first protocol; a first interface connected to the core network; a second interface for accommodating a first line connected to the third LAN and a second line connected to the fourth LAN, and for receiving IP packets from the third LAN via the first line and the IP packets from the fourth LAN via the second line, the IP packets from the third and the fourth LANs being encapsulated by a second protocol different from the first protocol; means for identifying which of the third VPN and the fourth VPN to which an IP packet received at the second interface belongs by physical interface numbers assigned to interface between the second interface and the first line and interface between the second interface and the second line; and means for registering physical interface numbers assigned to interface between the second interface and the first line and interface between the second interface and the second line as a VPN identifier for identifying which of the third VPN and the fourth VPN to which an IP packet received either the first line or the second line belongs. - View Dependent Claims (11, 12)
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13. A method of setting up a router connected to a core network, a first Local Area Network (LAN) belonging to a first Virtual Private Network (VPN), a second LAN belonging to a second VPN, a third LAN belonging to a third VPN and a fourth LAN belonging to a fourth VPN, said router having a memory, said method comprising the steps of:
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receiving IP packets from the first and the second LANs being encapsulated by a first protocol, and receiving IP packets from the third LAN via a first line and IP packets from the fourth LAN via a second line, the IP packets from the third and the fourth LANs being encapsulated by a second protocol different from the first protocol; and registering physical interface numbers assigned to interface between the router and the first line and interface between the router and the second line as a VPN identifier for identifying which of the third VPN and the fourth VPN to which an IP packet received either the first line or the second line belongs. - View Dependent Claims (14, 15)
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Specification