Communicating network information using universal resource locators

• US 6,529,894 B1
• Filed: 04/16/2002
• Issued: 03/04/2003
• Est. Priority Date: 05/21/1999
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Haeri, Arsalan, Soneson, Eric D.
• Primary Examiner(s): Mizrahi, Diane D.
• Application Number:
  US10/124,510
• Time in Patent Office: 322 Days
• Field of Search: 707/10, 709/223
• US Class Current: 1/1
• CPC Class Codes: G06F 16/955 using information identifiers, e.g. uniform resource locators [URL]
• CPC Class Codes: H04L 61/30 Managing network names, e.g. use of aliases or nicknames name-to-address mapping H04L61/45
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/102 Entity profiles
• CPC Class Codes: H04L 67/56 Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• CPC Class Codes: H04L 67/564 Enhancement of application control based on intercepted application data
• CPC Class Codes: Y10S 707/99931 Database or file accessing

Abstract

A method and apparatus are provided for communicating network information among network devices using protocols based on Universal Resource Locators. In one embodiment, an apparatus for retrieving SNMP or video information in a network, or carrying out remote network access, comprises a first URL interface executed by a client; a second URL interface executed by a server having a plurality of stored values; and means distributed among the first URL interface and the second URL interface for creating and storing a URL that includes an identifier of one or more of the stored values, retrieving that value from the server based on the identifier, and transporting the value from the server to the client. In another embodiment, a method comprises creating and storing a URL that includes a request for the value; communicating the URL to the server; extracting the request from the URL; and communicating a responsive URL, which includes the value of the attribute and an identifier of the attribute, from the server to the requesting client.

Claims

1. A method of retrieving a value of a Management Information Base (MIB) variable that is stored in a MIB of a managed device in a network, the method comprising:

creating and storing a Uniform Resource Locator (URL) that includes a Simple Network Management Protocol (SNMP) request for a value of the MIB variable;

communicating the URL to the managed device;

obtaining the SNMP request from the URL; and

communicating a responsive URL, which includes the value of the MIB variable and an identifier of the MIB variable, from the managed device.

2. A method as recited in claim 1, wherein creating and storing a URL includes creating and storing the URL using a device identifier value that uniquely identifies the managed device.

3. A method as recited in claim 1, wherein creating and storing a URL includes creating and storing the URL using a port identifier value that identifies a listening port of the managed device server at which the managed device receives requests that comprise a URL containing an SNMP request.

4. A method as recited in claim 1, wherein creating and storing a URL includes creating and storing the URL using an operation value that identifies an SNMP operation to be carried out by the managed device in response to receiving the URL.

5. A method as recited in claim 1, wherein creating and storing a URL includes creating and storing the URL in the form:

snmp[s];

//<

server-name>

;

<

port#>

/<

operation>

/<

snmp payload>

wherein “

[s]”

identifies an optional parameter indicating that a secure connection is to be established, the value <

server-name>

identifies the managed device, the value <

port#>

identifies a listening port number for a URL-based SNMP process on the managed device, the value <

operation>

identifies an SNMP operation for the managed device to carry out, and the value <

SNMP payload>

comprises one or more pairs of MIB variables and values.

6. A method of processing a value of a Management Information Base (MIB) variable that is stored in a MIB of a managed device of a network, the method comprising:

executing an SNMP agent and a first URL interface software element at the managed device;

creating and storing a Uniform Resource Locator (URL) that comprises an SNMP request for the MIB variable at the managed device, the request including information identifying the MIB variable and a type of SNMP processing to be carried out;

processing the request based on the type to result in retrieving the value of the MIB variable; and

communicating the value of the MIB variable to the managed device in a responsive URL.

7. A method as recited in claim 6, wherein processing the request comprises:

processing the request based on the type to result in storing the value of the MIB variable in the MIB of the managed device.

8. A method as recited in claim 6, wherein creating and storing a URL includes creating and storing the URL using a device identifier value that uniquely identifies the managed device.

9. A method as recited in claim 6, wherein creating and storing a URL includes creating and storing the URL using a port identifier value that identifies a listening port of the managed device at which the managed device receives requests that comprise a URL containing a SNMP request.

10. A method as recited in claim 6, wherein creating and storing a URL includes creating and storing the URL using a n operation value that identifies a SNMP operation to be carried out by the managed device in response to receiving the URL.

11. A method as recited in claim 6, wherein creating and storing a URL includes creating and storing the URL in the form:

snmp[s];

//<

server-name>

;

<

port#>

/<

operation>

/<

SNMP payload>

wherein “

[s]”

identifies an optional parameter indicating that a secure connection is to be established, the value <

server-name>

identifies the managed device, the value <

port#>

identifies a listening port number for a URL-based SNMP process on the managed device, the value <

operation>

identifies an operation for the managed device to carry out, and the value <

SNMP payload>

comprises an SNMP request that may include one or more pairs of MIB variables and values.

12. A method as recited in claim 6, further comprising the steps of:

executing a second URL interface software element at a client logically separate from the managed device;

receiving the responsive URL and obtaining the value of the MIB variable from the responsive URL using the second URL interface software element.

13. Apparatus for retrieving SNMP information from a network, comprising:

a first URL interface executed by a client;

a second URL interface executed by a managed device in the network having a Management Information Base (MIB) comprising a plurality of stored MIB variable values; and

means distributed among the first URL interface and the second URL interface for creating and storing a Uniform Resource Locator (URL) that includes an identifier of one or more of the MIB variables, retrieving a value for that variable from the managed device based on the identifier, and transporting the value from the managed device to the client.

14. An apparatus as recited in claim 13, wherein the means for creating and storing a URL includes means for creating and storing the URL using a device identifier value that uniquely identifies the managed device.

15. An apparatus as recited in claim 13, wherein the means for creating and storing a URL includes means for creating and storing the URL using a port identifier value that identifies a listening port of the managed device server at which the managed device receives requests that comprise a URL containing an SNMP request.

16. An apparatus as recited in claim 13, wherein the means for creating and storing a URL includes means for creating and storing the URL using an operation value that identifies an SNMP operation to be carried out by the managed device in response to receiving the URL.

17. An apparatus as recited in claim 13, wherein the means for creating and storing a URL includes means for creating and storing the URL in the form:

snmp[s];

//<

server-name>

;

<

port#>

/<

operation>

/<

snmp payload>

, wherein “

[s]”

identifies an optional parameter indicating that a secure connection is to be established, the value <

servername>

identifies the managed device, the value <

port#>

identifies a listening port number for a URL-based SNMP process on the managed device, the value <

operation>

identifies an SNMP operation for the managed device to carry out, and the value <

SNMP payload>

comprises one or more pairs of MIB variables and values.

18. A computer-readable medium carrying one or more sequences of instructions for retrieving a value of a Management Information Base (MIB) variable that is stored in a MIB of a managed device in a network, wherein execution of the one or more sequences of instructions by one or more processors causes the one or more processors to perform the steps of:

creating and storing a Uniform Resource Locator (URL) that includes a Simple Network Managemen Protocol (SNMP) request for a value of the MIB variable;

communicating the URL To the managed device;

obtaining the SNMP request from the URL; and

communicating a responsive URL, which includes the value of the MIB variable and an identifie of the MIB variable, from the managed device.

19. A computer-readable medium carrying one or more sequences of instructions for retrieving a value of a Management Information Base (MIB) variable that is stored in a MIB of a managed device in a network, wherein execution of the one or more sequences instructions by one or more processors causes the one or more processors to perform the steps of:

executing an SNMP agent and a first URL interface software element at the managed device;

creating and storing a Uniform Resource Locator (URL) that comprises an SNMP request for the MIB variable at the managed device, the request including information identifying the MIB variable and a type of SNMP processing to be carried out;

processing the request based on the type to result in retrieving the value of the MIB variable; and

communicating the value of the MIB variable to the managed device in a responsive URL.