Retention of a stack address during primary master failover

A stack and host technology, applied in the management field of the stack switch system, can solve problems such as impact troubles, temporary link interruptions, etc.

Inactive Publication Date: 2007-03-28
ALCATEL LUCENT SAS
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  • Claims
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Problems solved by technology

This also results in a temporary outage of the link
The effect is also

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  • Retention of a stack address during primary master failover
  • Retention of a stack address during primary master failover
  • Retention of a stack address during primary master failover

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[0028] The following detailed description illustrates the present invention by way of examples to enable those skilled in the art to clearly implement and use the present invention, without limiting the principles of the present invention, and describes various embodiments, modifications, variations, substitutions and Uses of the invention include embodiments believed to be the best modes presently carried out for carrying out the invention.

[0029]In order to better understand the drawings, in the following description, the same numbered reference numerals are used in each figure and description to identify the same or similar structures, actions, operations or processing steps. In addition, reference numerals in the one-hundred series, such as 102 and 104, are first introduced in FIG. 1, reference numerals in the two-hundred series are first introduced in FIG. 2, such as 222 and 224, and so on. Thus, in FIG. 9 the reference numerals within the sequence of nine hundred, for ...

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Abstract

The present invention features embodiments of alleviating the impact to a system of stack switches, as well as to neighboring nodes communicating with such a system, when a primary master switch to secondary master switch failover occurs. The features of the present invention, generally enables a system of stack switches to retain, for a fixed or indefinite period of time, its stack address even when multiple primary master to secondary master failovers occur. This way recalculation of certain protocols - e.g., spanning trees and link aggregations - and updating of certain tables - e.g., address resolution protocol (ARP) and routing tables - are minimized.

Description

technical field [0001] The present invention generally relates to the management of stacked switch systems within a data communications network. More particularly, the present invention relates to a fault-tolerant stacked switch system adapted to detect, handle and recover from switch failures without requiring changes to the stacked media access control (MAC) addresses of the stacked switch system. Background technique [0002] Stackable switches are switches or routers that can work in standalone mode or in a stack. These stackable switches, referred to herein as switches, are coupled into a single logical unit called a stack. The switches are operatively interconnected through a pair of designated stacking ports present on each switch. Stacked switch systems are typically coupled in series, the topology of which is typically characterized by closed loops called rings or open links of switches referred to herein as chains. Each stacked switch is adapted to perform switc...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L29/12
CPCH04L49/557H04L49/351H04L49/352H04L45/00H04L45/583H04L45/60
Inventor 文森特·马格雷特劳伦斯·罗斯
Owner ALCATEL LUCENT SAS
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