By Scott D. Empson
All of the BCMSN 642-812 instructions in a single compact, transportable source getting ready for the CCNP® certification? operating as a community specialist? listed below are the entire CCNP-level instructions for the BCMSN examination you wish in a single condensed, moveable source. The CCNP BCMSN moveable Command advisor is stuffed with invaluable, easy-to-access details and is transportable adequate to be used even if you’re within the server room or the apparatus closet. This ebook may also help you memorize instructions and ideas as you're employed to move the CCNP BCMSN examination (642-812). The advisor summarizes all CCNP certification-level Cisco IOS® software program instructions, keyword phrases, command arguments, and linked activates, giving you information and examples of ways to use the instructions to real-world situations. pattern configurations during the publication offer you a greater knowing of ways those instructions are utilized in easy community designs. the themes during this transportable command consultant disguise the right way to do the subsequent: enforce VLANs behavior the operation of Spanning Tree Protocol and EtherChannel in a hierarchical community enforce inter-VLAN routing enforce gateway redundancy applied sciences Describe and configure instant purchaser entry Describe and configure security measures in a switched community Configure help for voice Scott Empson is at present the assistant software chair of the bachelor of utilized details structures know-how measure application on the Northern Alberta Institute of know-how in Edmonton, Alberta, Canada, instructing Cisco® routing, switching, and community layout classes in certificates, degree, and utilized measure courses on the post-secondary point. he's additionally this system coordinator of the Cisco Networking Academy® software at NAIT, a neighborhood Academy overlaying primary and northerly Alberta. He has earned 3 undergraduate levels and at present holds a number of certifications, together with CCNP, CCDA®, CCAI, and Network+. entry all CCNP BCMSN commands—use as a brief offline source for learn and options Logical “how-to” subject groupings supply one-stop study nice for assessment earlier than taking the CCNP BCMSN certification examination Compact measurement makes it effortless to hold with you, at any place you cross “Create your personal magazine” part with clean, coated pages enables you to customize the publication on your wishes This e-book is a part of the Cisco Press® Certification Self-Study Product family members, which deals readers a self-paced research regimen for Cisco® certification assessments. Titles within the Cisco Press Certification Self-Study Product kinfolk are a part of a instructed studying software from Cisco that incorporates simulation and hands-on education from licensed Cisco studying companions and self-study items from Cisco Press. class: Cisco Press—Cisco Certification Covers: CCNP BCMSN Certification 642-812
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Show spanning-tree Switch#s interface fastethernet 0/10 portfast Displays PortFast information on interface fastethernet 0/10 BPDU Guard spanning-tree Switch(config)#s portfast bpduguard default Globally enables BPDU Guard interface range Switch(config)#i fastethernet 0/1 – 5 Enters interface range conﬁguration mode Switch(config-ifspanning-tree portfast range)#s Enables PortFast on all interfaces in the range NOTE: By default, BPDU Guard is disabled. errdisable Switch(config)#e recovery cause bpduguard Allows port to reenable itself if the cause of the error is BPDU Guard by setting a recovery timer Spanning Tree Protocol 23 errdisable Switch(config)#e recovery interval 400 Sets recovery timer to 400 seconds.
Therefore, if the root switch fails, and all other switches are set to the default priority of 32768, this becomes the new root switch. For switches without Extended System ID support, the switch priority is changed to 16384. spanning-tree Switch(config)#s vlan 5 root secondary diameter 7 Conﬁgures the switch to be the secondary root switch for VLAN 5 and sets the network diameter to 7 spanning-tree Switch(config)#s vlan 5 root secondary hello-time 4 Conﬁgures the switch to be the secondary root switch for VLAN 5 and sets the hellodelay timer to 4 seconds Conﬁguring Port Priority interface Switch(config)#i gigabitethernet 0/1 Moves to interface conﬁguration mode spanning-tree Switch(config-if)#s port-priority 64 Conﬁgures the port priority for the interface that is an access port 20 Spanning Tree Protocol spanning-tree Switch(config-if)#s vlan 5 port-priority 64 Conﬁgures the VLAN port priority for an interface that is a trunk port NOTE: Port priority is used to break a tie when two switches have equal priorities for determining the root switch.
The primary root switch priority is 24576. Spanning Tree Protocol 29 spanning-tree mst 1 Switch(config)#s root secondary Conﬁgures a switch as a secondary root switch within MST instance 1. The secondary root switch priority is 28672. exit Switch(config)#e Returns to privileged mode Verifying MST show spanning-tree mst Switch#s configuration Displays the MST region conﬁguration show spanning-tree mst 1 Switch#s Displays the MST information for instance 1 show spanning-tree mst Switch#s interface fastethernet 0/1 Displays the MST information for interface fastethernet 0/1 show spanning-tree mst 1 Switch#s interface fastethernet 0/1 Displays the MST information for instance 1 on interface fastethernet 0/1 show spanning-tree mst 1 Switch#s detail Shows detailed information about MST instance 1 Troubleshooting Spanning Tree debug spanning-tree all Switch#d Displays all spanning-tree debugging events debug spanning-tree events Switch#d Displays spanning-tree debugging topology events debug spanning-tree Switch#d backbonefast Displays spanning-tree debugging BackboneFast events debug spanning-tree Switch#d uplinkfast Displays spanning-tree debugging UplinkFast event debug spanning-tree mstp all Switch#d Displays all MST debugging events debug spanning-tree switch Switch#d state Displays spanning-tree port state changes debug spanning-tree pvst+ Switch#d Displays PVST+ events 30 Spanning Tree Protocol Conﬁguration Example: STP Figure 3-1 shows the network topology for the conﬁguration that follows, which shows how to conﬁgure STP using commands covered in this chapter.