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Spanning-Tree Protocol Enhancements using Loop Guard and BPDU Skew Detection Features
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Spanning Tree Protocol (STP) resolves physically redundant topologies into loop-free, tree-like topologies. The biggest issue with STP is that some hardware failures can cause it to fail. This failure creates forwarding loops (or STP loops). Major network outages...
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www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a0080094640.shtml
22 Jan 2007
This document explains the PortFast Bridge Protocol Data Unit (BPDU) guard feature. This feature is one of the Spanning Tree Protocol (STP) enhancements that Cisco created. This feature enhances switch network reliability, manageability,...
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www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a008009482f.shtml
01 Sep 2005
This document explains the Spanning Tree Protocol (STP) root guard feature. This feature is one of the STP enhancements that Cisco created. This feature enhances switched network reliability, manageability, and security.
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www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800ae96b.shtml
30 Aug 2005
In Layer 2 (L2) networks, there can be only one path between any two devices. Redundancy is supported with Spanning-Tree Protocol (STP), which detects and blocks redundant paths and thereby avoids forwarding loops. Certain misconfigurations can lead to STP failure and cause...
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www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00801d11a0.shtml
01 Sep 2005
...Root Guard Enhancement 30/Aug/2005 Spanning-Tree Protocol Enhancements using Loop Guard and BPDU Skew Detection Features 22/Jan...
www.cisco.com/en/US/tech/tk389/tk621/tech_configuration_examples_list.html
25 Apr 2005
This document explains how the Unidirectional Link Detection (UDLD) protocol can help to prevent forwarding loops and blackholing of traffic in switched networks.
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www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a008009477b.shtml
09 Jul 2007
...Root Guard Enhancement 30/Aug/2005 Spanning-Tree Protocol Enhancements using Loop Guard and BPDU Skew Detection Features 22/Jan...
www.cisco.com/en/US/tech/tk389/tk621/tsd_technology_support_troubleshooting_technotes_list.html
25 Apr 2005
This document provides guidelines to use Cisco IOS® software to troubleshoot issues with Spanning-Tree Protocol (STP). There are specific commands which apply to the Catalyst 6500/6000 only; however, you can apply most of the principles to any Cisco Catalyst switch that runs...
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www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a0080136673.shtml
01 Sep 2005
Backbone fast is a Cisco proprietary feature that, once enabled on all switches of a bridge network, can save a switch up to 20 seconds (max_age) when it recovers from an indirect link failure. After a quick review of some Spanning-Tree Protocol (STP) basics, you can see the...
www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800c2548.shtml
30 Aug 2005
...Root Guard Enhancement 30/Aug/2005 Spanning-Tree Protocol Enhancements using Loop Guard and BPDU Skew Detection Features 22/Jan...
www.cisco.com/en/US/tech/tk389/tk621/tech_tech_notes_list.html
25 Apr 2005
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