Technical enhancements to stp (ieee 802.1d) implementation
AssigneeBrocade Communications Systems, Inc.
InventorsBenny J. Thottakkara, Rajiv Ramanathan
Life of this patent
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Abstract
An embodiment includes a method of minimizing the delay in convergence time for a complex STP topology following a topology change in the network system in the spanning tree protocol (STP) standard, including: receiving, by a root port of a first bridge, a data message that includes identification of a current root bridge and a priority value of the current root bridge; receiving, by a second port of the first bridge, a second data message from a second bridge; and if a message age timer of the first bridge has less than a limiting message age time value remaining before expiry, then blocking a reply, by the second port of the first bridge, to the second data message from the second bridge.
Claims10
A method comprising:
- placing a port in fast span configuration;
- if the port receives any bridge protocol unit (BPDU), placing the port in a non-fast-span configuration;
- and
- upon initialization of the port, if the port is in a fast span configuration, shortening a forward delay of the port, wherein the port is placed in a forwarding state upon expiry of the delay.
An apparatus comprising:
- a plurality of ports;
- and
- one or more engines configured to:
- place a port in fast span configuration;
- if the port receives any bridge protocol unit (BPDU), place the port in a non-fast-span configuration;
- and
- upon initialization of the port, if the port is in a fast span configuration, shorten a forward delay of the port, wherein the port is placed in a forwarding state upon expiry of the delay.
A machine-readable medium having a program of instructions stored thereon that are executable by the machine to perform a method, the method comprising:
- placing a port in fast span configuration;
- if the port receives any bridge protocol unit (BPDU), placing the port in a non-fast-span configuration;
- and
- upon initialization of the port, if the port is in a fast span configuration, shortening a forward delay of the port, wherein the port is placed in a forwarding state upon expiry of the delay.
An apparatus comprising:
- means for placing a port in fast span configuration;
- means for, if the port receives any bridge protocol unit (BPDU), placing the port in a non-fast-span configuration;
- and
- means for, upon initialization of the port, if the port is in a fast span configuration, shortening a forward delay of the port, wherein the port is placed in a forwarding state upon expiry of the delay.
Dependencies are inferred from the claim text.