DISTRIBUTION OF TRAFFIC ACROSS A COMPUTER NETWORK

• US 20080279222A1
• Filed: 07/23/2008
• Published: 11/13/2008
• Est. Priority Date: 10/18/2001
• Status: Abandoned Application

• Current Assignee: Level 3 Communications LLC (Lumen Technologies, Inc.)
• Original Assignee: Level 3 Communications LLC (Lumen Technologies, Inc.)
• Inventors: Miller, Matthew, Slocombe, Michael, Fuller, Vincent A.
• Application Number:
  US12/178,498
• Publication Number:
  US 20080279222A1
• Time in Patent Office: Days
• US Class Current: 370/501
• CPC Class Codes: H04L 12/5691 Access to open networks; Ingress point selection, e.g. ISP selection
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/80 Ingress point selection by the source endpoint, e.g. selection of ISP or POP
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1021 based on client or server locations
• CPC Class Codes: H04L 67/563 Data redirection of data network streams

Abstract

A system and method of distributing traffic across a computer network is provided using a relay apparatus. A relay apparatus includes an interface to a communication network, a data store, and a processor. The data store includes data elements associating a first network address of a server to a second network address of the server. The processor is configured to receive a request corresponding to a data element in the data store, use the data element to determine a corresponding server, and forward the request to the server in a manner such that any response to the forwarded request is sent to the relay apparatus.

Claims

1. A relay apparatus associated with a first Internet service provider (ISP) at a first point of presence (POP) in a first geographic area, wherein the first ISP includes a first remote POP in a second geographic area, the first POP and first remote POP in communication via a first wide area network (WAN) of the first ISP, the relay apparatus comprising:

an interface in communication with the first WAN of the first ISP;

a processor configured to receive a request from a second POP of a second ISP in the first geographic area, wherein the second ISP includes a second remote POP in the second geographic area, the second POP and the second remote POP in communication via a second WAN of the second ISP;

wherein the request is intended for a server at the first remote POP of the first ISP in the second geographic area;

wherein the processor is further configured to initiate transmission of the request to the server via the first WAN by identifying the relay apparatus as the source of the request; and

wherein identification of the relay apparatus as the source of the request inhibits the server from transmitting any responses to the request across the second WAN from the second remote POP to the second POP, and, instead, induces the server to transmit any responses to the request across the first WAN from the first remote POP to the first POP via the relay apparatus.

2. The relay apparatus as in claim 1, wherein the processor is further configured to receive a response to the request from the server across the first WAN and initiate transmission of the response from the first POP of the first ISP to the second POP of the second ISP in the first geographic area.

3. The relay apparatus as in claim 2, wherein the request is received from a user device in communication with the second POP of the second ISP in the first geographic area.

4. The relay apparatus as in claim 1 further comprising:

a domain name server (DNS) in the first geographic area configured to receive the request and identify an anycast address associated with the server to which the request is intended; and

wherein the DNS is further configured to initiate assignment of the anycast address associated with the server to the relay apparatus.

5. The relay apparatus as in claim 4, wherein the processor is configured to receive the request when the request is addressed to the anycast address of the server;

and

wherein the processor is configured to initiate transmission of the request to the server by using a unicast address associated with the server.

6. The relay apparatus as in claim 4, wherein the anycast address assigned to the relay apparatus has a subnet portion corresponding to the first ISP.

7. The relay apparatus as in claim 1 further comprising a web cache for processing user requests intended for the server.

8. A method comprising:

at a first point of presence (POP) associated with a first Internet service provider (ISP), receiving a request from a second POP associated with a second ISP, wherein the first POP and the second POP are in a first geographic area;

wherein receiving the request includes identifying a server to which the request is intended, the server being at a first remote POP associated with the first ISP in a second geographic area, wherein the first POP and the first remote POP are in communication via a first wide area network (WAN) of the first ISP, and wherein the second ISP includes a second remote POP at the second geographic area, the second POP and the second remote POP in communication via a second WAN of the second ISP; and

modifying the request to specify an address of a relay device at the first POP as the source of the request, wherein modifying the request inhibits the server from transmitting any responses to the request across the second WAN from the second remote POP to the second POP, and, instead, induces the server to transmit any responses to the request across the first WAN from the first remote POP to the first POP via the relay apparatus.

9. The method as in claim 8 further comprising:

receiving a response to the request from the server across the first WAN; and

initiating transmission of the response from the first POP of the first ISP to the second POP of the second ISP in the first geographic area.

10. The method as in claim 9, wherein receiving the request further includes identifying a source of the request as a user device in communication with the second POP of the second ISP in the first geographic area.

11. The method as in claim 8 further comprising:

receiving an anycast address from a domain name server (DNS), the anycast address associated with the server to which the request is intended; and

associating the anycast address to an address of the relay device.

12. The method as in claim 11, wherein receiving the request further includes identifying a destination address of the request as the anycast address of the server;

and

initiating transmission of the request to the server using a unicast address associated with the server as the destination address of the request.

13. The method as in claim 11 further comprising:

associating the anycast address to an address of the relay device to have a subnet portion corresponding to the first ISP.

14. The method as in claim 11 further comprising:

associating the anycast address to an address of a web cache.

15. A system comprising:

a first point of presence (POP) associated with a first Internet service provider (ISP) in a first geographic area, wherein the first POP is in communication with a first remote POP of the First ISP across a first wide area network (WAN) of the first ISP, the first remote POP located in a second geographic area;

a second (POP) associated with a second Internet service provider (ISP) in the first geographic area, wherein the second POP is in communication with a second remote POP of the second ISP across a second wide area network (WAN) of the second ISP, the second remote POP located in the second geographic area;

a server at the first remote POP of the first ISP in the second geographic area, the server configured to respond to requests from users of at least the first ISP and the second ISP;

at least one relay device configured to receive a request from the second POP of the second ISP in the first geographic area, wherein the request is intended for the server at the first remote POP of the first ISP in the second geographic area;

wherein the at least one relay device is further configured to initiate transmission of the request to the server via the first WAN by identifying the at least one relay device as the source or the request; and

wherein identification of the at least one relay device as the source of the request inhibits the server from transmitting any responses to the request across the second WAN from the second remote POP to the second POP, and, instead, induces the server to transmit any responses to the request across the first WAN from the first remote POP to the first POP via the relay device.

16. The system as in claim 15, wherein the at least one relay device receives a response to the request from the server across the first WAN and initiates transmission of the response from the first POP of the first ISP to the second POP of the second ISP in the first geographic area.

17. The system as in claim 16, wherein the request is received from a user device in communication with the second POP of the second ISP in the first geographic area.

18. The system as in claim 15 further comprising:

a domain name server (DNS) in the first geographic area configured to receive the request and identify an anycast address associated with the server to which the request is intended; and

wherein the DNS is further configured to initiate assignment of the anycast address associated with the server to the at least one relay device.

19. The system as in claim 18, wherein the at least one relay device receives the request when the request is addressed to the anycast address of the server;

and

wherein the at least one relay device initiates transmission of the request to the server by using a unicast address associated with the server.

20. The system as in claim 18, wherein the anycast address assigned to the at least one relay device has a subnet portion corresponding to the first ISP.