Spanning tree protocol warm reboot system
First Claim
1. A spanning tree protocol warm reboot system, comprising:
- at least one first switch device including first switch ports; and
a second switch device including second switch ports that are linked to respective first switch ports on the at least one first switch device, wherein the second switch device is configured, during a warm reboot, to;
block second switch ports that have a designated state and that are linked to first switch ports that have either an alternate role or a discarding state;
redirect, on second switch ports that have the designated state, bridge protocol data units (BPDUs) that identify a designated peer port role and that are received from their respective linked first switch ports back to those first switch ports; and
identify, on the second switch ports, at least one topology change notification received by those second switch ports; and
wherein the second switch device is configured, subsequent to the warm reboot, to;
reprogram second switch ports that have experienced a state change during the warm reboot; and
send, based on identifying the at least one topology change notification received by the second switch ports during the warm reboot, a topology change notification on a forwarding second switch port.
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Accused Products
Abstract
An STP warm reboot system includes first switch device(s) including first switch ports, and a second switch device including second switch ports linked to respective first switch ports. During a warm reboot, the second switch device blocks designated-state second switch ports that are linked to first switch ports that have either an alternate role or a discarding state, redirects BPDUs identifying a designated peer port role and received on designated-state second switch ports from their respective linked first switch ports back to those first switch ports, and identifies topology change notification(s) received on the second switch ports. Subsequent to the warm reboot process, the second switch device reprograms the second switch ports that have experienced a state change during the warm reboot, and sends a topology change notification based on the identification of the topology state change notification received by the second switch ports during the warm reboot.
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Citations
20 Claims
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1. A spanning tree protocol warm reboot system, comprising:
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at least one first switch device including first switch ports; and a second switch device including second switch ports that are linked to respective first switch ports on the at least one first switch device, wherein the second switch device is configured, during a warm reboot, to; block second switch ports that have a designated state and that are linked to first switch ports that have either an alternate role or a discarding state; redirect, on second switch ports that have the designated state, bridge protocol data units (BPDUs) that identify a designated peer port role and that are received from their respective linked first switch ports back to those first switch ports; and identify, on the second switch ports, at least one topology change notification received by those second switch ports; and wherein the second switch device is configured, subsequent to the warm reboot, to; reprogram second switch ports that have experienced a state change during the warm reboot; and send, based on identifying the at least one topology change notification received by the second switch ports during the warm reboot, a topology change notification on a forwarding second switch port. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An Information Handling System (IHS), comprising:
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a plurality of first ports; a processing system that is coupled to the plurality of first ports; and a memory system that is coupled to the processing system and that includes instructions that, when executed by the processing system, cause the processing system to provide a spanning tree protocol engine that is configured, during a warm reboot, to; block each of the plurality of first ports that have a designated state and that are linked to respective second ports that have either an alternate role or a discarding state; redirect, for each of the plurality of first ports that have the designated state, first protocol data units (BPDUs) that identify a designated peer port role back to their source; and identify, on each of the plurality of first ports, at least one topology change notification received by those first ports; and wherein the spanning tree protocol engine is configured, subsequent to the warm reboot, to; reprogram at least some of the plurality of first ports that have experienced a state change during the warm reboot; and send, based on identifying the at least one topology change notification received by the first ports during the warm reboot, a topology change notification on a forwarding port. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method for providing spanning tree protocol warm reboots, comprising:
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blocking, by a first switch device during a warm reboot of the first switch device, first switch ports on the first switch device that have a designated state and that are linked to second switch ports on a second switch device that have either an alternate role or a discarding state; redirecting, during the warm reboot by the first switch device on first switch ports that have the designated state, first bridge protocol data units (BPDUs) that identify a designated peer port role and that are received from their respective linked second switch ports back to those second switch ports; and identifying, during the warm reboot by the first switch device on the first switch ports, at least one topology change notification received by those first switch ports; reprogramming, subsequent to the warm reboot by the first switch device, at least some of the first switch ports that have experienced a state change during the warm reboot; and sending, subsequent to the warm reboot by the first switch device and based on identifying the at least one topology change notification received by the first switch ports during the warm reboot, a topology change notification on a forwarding first switch port. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification