HIGH PERFORMANCE DNS TRAFFIC MANAGEMENT

• US 20140280305A1
• Filed: 03/15/2013
• Published: 09/18/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: VeriSign, Inc.
• Original Assignee: VeriSign, Inc.
• Inventors: Das, Arunabho, James, Stephen Daniel
• Granted Patent: US 9,197,487 B2
• Time in Patent Office: Days
• US Class Current: 707/769
• CPC Class Codes: H04L 41/00 Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 61/4552 Lookup mechanisms between a plurality of directories; Synchronisation of directories, e.g. metadirectories

Abstract

The present disclosure provides systems, methods, and products for high performance implementation of traffic management rules. In various embodiments, traffic management rules, such as DNS traffic management rules, are functionally expressed as rows in one or more lookup tables that are deployed to DNS resolution servers. The DNS resolution server uses the domain name, resource record type, traffic management rule types, and/or traffic management variable values to search for or look up an answer, from among multiple answers corresponding to the domain name and resource record type that meets the traffic management criteria. This look up is done without executing conventional traffic management code or scripts.

Claims

1. A method, implemented using a computing system, for managing network traffic, the method comprising:

receiving a domain name and resource record type from a requestor;

searching at least one table, using the computing system and using the domain name and resource record type as a search key, for a traffic management rule, wherein the traffic management rule specifies a variable that affects the traffic management rule;

determining, using the computing system, a value for the variable that affects the traffic management rule;

searching the at least one table, using the computing system and using the value for the variable as a search key, for a rule type;

repeatedly searching the at least one table, using the domain name and resource record type as a search key and using a rule type as a search key, until the repeatedly searching obtains an answer; and

providing the answer to the requestor.

2. The method of claim 1, further comprising:

expressing a DNS traffic management rule as a row in the table.

3. The method of claim 1, further comprising:

expressing a set of DNS traffic management rules as a plurality of rows in the table.

4. The method of claim 1, further comprising:

searching the table, using the domain name and resource record type as a search key and using a rule type as a search key, for a second traffic management rule.

5. The method of claim 1, wherein searching the table, using the computing system and using the value for the variable as a search key, for the answer corresponding to the domain name and resource record type comprises:

searching the table for a plurality of resource records corresponding to the domain name and resource record type; and

wherein providing the answer to the requestor comprises;

providing the plurality of resource records to the requestor.

6. The method of claim 1, further comprising:

searching the table, using the value for the variable as a search key, for information corresponding to the domain name and resource record type in addition to the answer; and

providing the information to the requestor.

7. A non-transitory computer-readable medium containing instruction that when executed by a processor implement operations comprising:

receiving a domain name and resource record type from a requestor;

searching at least one table, using the computing system and using the domain name and resource record type as a search key, for a traffic management rule, wherein the traffic management rule specifies a variable that affects the traffic management rule;

determining, using the computing system, a value for the variable that affects the traffic management rule;

searching the at least one table, using the computing system and using the value for the variable as a search key, for a rule tyre;

repeatedly searching the at least one table, using the domain name and resource record type as a search key and using a rule type as a search key, until the repeatedly searching obtains an answer; and

providing the answer to the requestor.

8. The non-transitory computer-readable medium of claim 7, the operations further comprising:

expressing a DNS traffic management rule as a row in the table.

9. The non-transitory computer-readable medium of claim 7, the operations further comprising:

expressing a set of DNS traffic management rules as a plurality of rows in the table.

10. The non-transitory computer-readable medium of claim 7, the operations further comprising:

searching the table, using the domain name and resource record type as a search key and using a rule type as a search key, for a second traffic management rule.

11. The non-transitory computer-readable medium of claim 7, wherein searching the table, using the computing system and using the value for the variable as a search key, for the answer corresponding to the domain name comprises:

searching the table, for a plurality of resource records corresponding to the domain name and resource record type; and

wherein providing the answer to the requestor comprises;

providing the plurality of resource records to the requestor.

12. The non-transitory computer-readable medium of claim 7, the operations further comprising:

searching the table, using the value for the variable as a search key, for information corresponding to the domain name and resource record type in addition to the answer; and

providing the information to the requestor.

13. A system for managing network traffic, the system comprising:

a memory containing instructions; and

a processor, operably connected to the memory, that executes the instructions to perform operations comprising;

receiving a domain name and resource record type from a requestor;

searching at least one table, using the computing system and using the domain name and resource record type as a search key, for a traffic management rule, wherein the traffic management rule specifies a variable that affects the traffic management rule;

determining, using the computing system, a value for the variable that affects the traffic management rule;

searching the at least one table, using the computing system and using the value for the variable as a search key, for a rule type;

repeatedly searching the at least one table, using the domain name and resource record type as a search key and using a rule type as a search key, until the repeatedly searching obtains an answer; and

providing the answer to the requestor.

14. The system of claim 13, the operations further comprising:

expressing a DNS traffic management rule as a row in the table.

15. The system of claim 13, the operations further comprising:

expressing a set of DNS traffic management rules as a plurality of rows in the table.

16. The system of claim 13, the operations further comprising:

searching the table, using the domain name and resource record type as a search key and using a rule type as a search key, for a second traffic management rule.

17. The system of claim 13, wherein searching the table, using the computing system and using the value for the variable as a search key, for the answer corresponding to the domain name and resource record type comprises:

searching the table, for a plurality of resource records corresponding to the domain name; and

wherein providing the answer to the requestor comprises;

providing the plurality of resource records to the requestor.

18. The system of claim 13, the operations further comprising:

searching the table, using the value for the variable as a search key, for information corresponding to the domain name and resource record type in addition to the answer; and

providing the information to the requestor.