Use of unique XID range among multiple control processors

Details Use of unique XID range among multiple control processors Use of unique XID range among multiple control processors

2006-07-11

2006-07-11

Le, Dieu-Minh (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S013000

Reexamination Certificate

active

07076689

ABSTRACT:
A “high availability” system comprises multiple switches under the control of multiple control processors (“CPs”). One of the CPs is “active,” while the other CP is in a “standby” mode. Upon detection of a failure of the active CP, fail-over occurs to the standby CP. The standby CP re-issues all messages that the previously active CP had issued and which had not yet completed when the fail-over occurred. The newly active CP uses a different range of transaction identifiers (“XIDs”) than its predecessor CP. By using a different range of XID values, the newly active CP determines whether an incoming response message is responsive to a message that originated from the previously active CP or the newly activated CP. The currently active CP ignores all response messages that do not have an XID in its range, thereby ensuring proper and reliable messaging.

REFERENCES:
patent: 5790775 (1998-08-01), Marks et al.
patent: 5974114 (1999-10-01), Blum et al.
patent: 5978933 (1999-11-01), Wyld et al.
patent: 6578158 (2003-06-01), Deitz et al.
patent: 6832298 (2004-12-01), Fujii et al.
patent: 2003/0188233 (2003-10-01), Lubbers et al.

Affiliated with

Also associated with

Rating

Use of unique XID range among multiple control processors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Use of unique XID range among multiple control processors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Use of unique XID range among multiple control processors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3560187