Adaptible keepalive for enterprise extenders

• US 20070233855A1
• Filed: 04/03/2006
• Published: 10/04/2007
• Est. Priority Date: 04/03/2006
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Brown, Patrick, Kunkel, Randall
• Application Number:
  US11/396,532
• Publication Number:
  US 20070233855A1
• Time in Patent Office: Days
• US Class Current: 709/224
• CPC Class Codes: H04L 43/10 Active monitoring, e.g. heartbeat, ping or trace-route
• CPC Class Codes: H04L 43/103 with adaptive polling, i.e. dynamically adapting the polling rate

Abstract

Embodiments of the present invention address deficiencies of the art in respect to keep alive processing for enterprise extenders and provide a method, system and computer program product for adaptable keep alive processing for enterprise extenders. In one embodiment of the invention, an EE keep alive data processing system can be provided. The system can include an EE, a keep alive processor coupled to the EE, and a variable current timer value. The value can be configured for expansion in size responsive to the keep alive processor detecting a period of inactivity in an EE partner. The value further can be configured for contraction in size responsive to the keep alive processor detecting a period of activity in the EE partner.

Claims

1. An enterprise extender (EE) keep alive data processing system comprising:

an EE;

a keep alive processor coupled to the EE; and

,

a variable current timer value configured for expansion in size responsive to the keep alive processor detecting a period of inactivity in an EE partner, and for contraction in size responsive to the keep alive processor detecting a period of activity in the EE partner.

2. The system of claim 1, wherein the EE is disposed between a systems network architecture (SNA) network and an Internet protocol (IP) network.

3. The system of claim 1, wherein the variable current timer value is configured to double in size up to a maximum pre-specified value responsive to the keep alive processor detecting a period of inactivity in an EE partner, and for contraction to a default size responsive to the keep alive processor detecting a period of activity in the EE partner

4. The system of claim 1, wherein the period of inactivity is represented by the detection of inbound packets from the EE partner.

5. The system of claim 1, wherein the inbound packets comprises high performance router (HPR) packets containing a payload.

6. The system of claim 1, wherein the inbound packets comprise high performance router (HPR) packets containing pathswitch information.

7. The system of claim 1, wherein the inbound packets comprises an inbound exchange identifier (XID) from an EE partner meeting criteria indicative of an EE partner attempting to restart a connection with the EE.

8. The system of claim 1, wherein the keep alive processor comprises program code enabled to transmit logical data link (LDLC) test flows to EE partners during a keep alive operation.

9. A keep alive processing method for an enterprise extender (EE), the method comprising:

monitoring an EE partner link with an EE partner for traffic from the EE partner for an interval specified by a current timer value;

varying a size of the current timer value responsive to detecting periods of activity and inactivity in the EE partner link; and

,

keep alive processing the EE partner link whenever traffic is not detected during the interval.

10. The method of claim 9, wherein monitoring an EE partner link with an EE partner for traffic from the EE partner for an interval specified by a current timer value, comprises monitoring an EE partner link with an EE partner for one of high performance router (HPR) data packets containing a data payload, HPR data packets containing pathswitch information, and inbound exchange identifiers (XID)s from an EE partner meeting criteria indicative of an EE partner attempting to restart a connection with the EE.

11. The method of claim 9, wherein varying a size of the current timer value responsive to detecting periods of activity and inactivity in the EE partner link, comprises doubling the size of the current timer value up to a maximum pre-specified size responsive to detecting periods of inactivity in the EE partner link.

12. The method of claim 11, further comprising restoring the size of the current timer value to an initial current timer value responsive to detecting periods of activity in the EE partner link.

13. A computer program product comprising a computer usable medium embodying computer usable program code for keep alive processing for an enterprise extender (EE), the computer program product including:

computer usable program code for monitoring an EE partner link with an EE partner for traffic from the EE partner for an interval specified by a current timer value;

computer usable program code for varying a size of the current timer value responsive to detecting periods of activity and inactivity in the EE partner link; and

,

computer usable program code for keep alive processing the EE partner link whenever traffic is not detected during the interval.

14. The computer program product of claim 13, wherein the computer usable program code for monitoring an EE partner link with an EE partner for traffic from the EE partner for an interval specified by a current timer value, comprises computer usable program code for monitoring an EE partner link with an EE partner for one of high performance router (HPR) data packets containing a data payload, HPR data packets containing pathswitch information, and inbound exchange identifiers (XID)s from an EE partner meeting criteria indicative of an EE partner attempting to restart a connection with the EE.

15. The computer program product of claim 13, wherein the computer usable program code for varying a size of the current timer value responsive to detecting periods of activity and inactivity in the EE partner link, comprises computer usable program code for doubling the size of the current timer value up to a maximum pre-specified size responsive to detecting periods of inactivity in the EE partner link.

16. The computer program product of claim 15, further comprising computer usable program code for restoring the size of the current timer value to an initial current timer value responsive to detecting periods of activity in the EE partner link.