300-115 Exam Dumps | Which IOS interface configuration commands are required to configure a switch port to actively negotiate

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Question 213/495

Which IOS interface configuration commands are required to configure a switch port to actively negotiate
to be an 802.1Q trunk port that, when active, will send packets destined for VLAN 3 untagged? (Choose
three.)

A. switchport mode trunk

B. switchport trunk dot1q 3

C. switchport native vlan 3

D. switchport trunk mode dot1q

E. switchport mode dynamic auto

F. switchport trunk native vlan 3

G. switchport trunk encapsulation dot1q

Correct Answer: A,F,G

Explanation/Reference:
Explanation:
Entering the IOS commands switchport mode trunk and switchport trunk encapsulation dot1q in interface
configuration mode will allow a switch port to actively negotiate to be an 802.1Q trunk port. Setting the
trunk native VLAN to 3 with the command switchport trunk native vlan 3 will allow VLAN 3 traffic to be sent
and received untagged over the trunk port.
The command switchport mode trunk instructs DTP to actively negotiate to be a trunk if the other side is
set to trunk, desirable, or auto.
Use the following steps to configure a port as an 802.1Q trunk:
1. Enter the interface configuration.
switch(config)# interface interface-id
2. Configure the port to using 802.1Q encapsulation.
switch(config-if)# switchport trunk encapsulation dot1q
3. Configure the port as a trunk port.
switch(config-if)# switchport mode trunk
4. (Optional) Set the native VLAN number.
switchport trunk native vlan number
If the native VLAN is changed as above, it must be changed on both ends of the link. Failure to do so will
cause the link to not be successfully built because the native VLAN numbers must match. When left to the
default (VLAN 1) the issue takes care of itself. If a native VLAN mismatch occurs, it will be reflected in the
debug command output of one of the switches, as shown below.
2009 Aug 11 16:36:11 %SPNTREE-2-RX_IQPVIDERR:Rcvd pvid_inc BPDU on 1Q port 0/2 vlan3
2009 Aug 11 16:36:11 %SPNTREE-2-TX_BLKPORTPVID:Block 0/2 on xmitting vlan 1 for inc peer vlan
2009 Aug 11 16:36:11 %SPNTREE-2-RX_BLKPORTPVID:Block 0/2 on rcving vlan 3 for inc peer vlan 1
Note: Trunking modes can be configured as access, dynamic desirable, dynamic auto, trunk, and
nonegotiate. If both sides are set to auto, no negotiations will occur.
The switchport allowed vlan command is also valid for configuring dot1q trunks, but is not required. By
default, all VLANs are allowed on the trunk.
Objective:
Layer 2 Technologies
Sub-Objective:
Configure and verify trunking
References:
Cisco > Home > Support > Product Support > Switches > Cisco Catalyst VST 2950 Series Switches >
Configure > Configuration Examples and Technotes > Configuring EtherChannel and 802.1Q Trunking
Between Catalyst L2 Fixed Configuration Switches and a Router (InterVLAN Routing)
Cisco > Cisco IOS Interface and Hardware Component Command Reference > switchport trunk
Cisco > Cisco IOS Interface and Hardware Component Command Reference > I through K > interface

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(Choose tw...; Question 393: An EtherChannel bundle has been established between a Cisco ...; Question 394: Which two commands enable you to determine the native VLAN t...; Question 395: Which command must an administrator use to determine the nat...; Question 396: After UDLD is implemented, a Network Administrator noticed t...; Question 397: The following command was issued on a router that is being c...; Question 398: Which statement describes what happens when a port configure...; Question 399: Which Cisco StackWise feature is supported?...; Question 400: Which three characteristics of AAA with RADIUS are true? (Ch...; Question 401: Instructions: Enter IOS commands on the device to verify net...; Question 402: Which statement about SPAN is true?...; Question 403: Which two options are two results of using the command spann...; Question 404: Refer to the exhibit. Which two statements about the network...; Question 405: Which of the following are true regarding TACACS+. ? (Choose...; Question 406: Which statement about local database device authentication i...; Question 407: Which two statements about LLDP are true? (Choose two.)...; Question 408: Which IOS interface configuration command is required to con...; Question 409: Which feature describes MAC addresses that are dynamically l...; Question 410: A switch which was connected with 2 fiber cables attached to...; Question 411: After reviewing UDLD status on switch ports, an engineer not...; Question 412: Refer to the exhibit. (Exhibit) A multilayer switch has been...; Question 413: What is an extension of HSRP that allows load sharing betwee...; Question 414: Which command overrides the default priority of frames on an...; Question 415: While working in the core network building, a technician acc...; Question 416: Which command identifies the learned addresses in the MAC ad...; Question 417: Which statement describes one major issue that VTP can cause...; Question 418: In a Cisco StackWise Virtual environment, which planes on th...; Question 419: Which security violation mode drops packets with unknown sou...; Question 420: You are the network administrator in your company. You have ...; Question 421: Which protocol provides port-based access control and authen...; Question 422: Which three features of AAA with TACACS+ are true? (Choose t...; Question 423: What happens if you apply this command "vlan dot1q tag nativ...; Question 424: Which two port err-disabled recovery options are used to det...; Question 425: What is the link called between a VSS?...; Question 426: Which two statements about recovering error-disabled interfa...; Question 427: Which two commands can you enter to configure load-balancing...; Question 428: The command storm-control broadcast level 75 65 is configure...; Question 429: Which mechanism is specific for RSPAN and not for SPAN?...; Question 430: Which two statements about dynamic MAC address learning are ...; Question 431: Which two command sequences must you enter on a pair of swit...; Question 432: Which three HSRP exchange states are used in multicast messa...; Question 433: Which feature prevents a newly-added switch from being the p...; Question 434: What are the possible results of port-security?...; Question 435: Which three characteristics of AAA with TACACS+ are true? (C...; Question 436: Which two statements about configuring EtherChannels are tru...; Question 437: Which two statements about native VLANs are true? (Choose tw...; Question 438: What is the maximum number of 10 Gigabit Ethernet connection...; Question 439: A switch is added into the production network to increase po...; Question 440: Which two possible EtherChannel load balancing mechanisms ar...; Question 441: What are two advantages of LLDP over Cisco Discovery Protoco...; Question 442: In a Cisco switch, what is the default period of time after ...; Question 443: What is true about CDP? (Choose two.)...; Question 444: Interfaces are assigned to a VLAN, and then the VLAN is dele...; Question 445: Which two statements about errdisable recovery are true? (Ch...; Question 446: A network is running VTPv2. After verifying all VTP settings...; Question 447: Which VLAN range is eligible to be pruned when a network eng...; Question 448: Which three statements about extended VLANs are true? (Choos...; Question 449: Your manager asked you to make every port on your switch byp...; Question 450: To provide security, a service provider configures various p...; Question 451: On which interface can port security be configured?...; Question 452: Which two control protocols use the native VLAN 1 by default...; Question 453: Which two DTP negotiated interface mode combinations negotia...; Question 454: Which three statements about SPAN and RSPAN are true? (Choos...; Question 455: Which of the following is true about CDP?...; Question 456: For security reasons, the IT manager has prohibited users fr...; Question 457: Which statement about EtherChannels are true?...; Question 458: Which command can you enter to set the time between BPDUs in...; Question 459: Consider the following commands executed on a Layer 3 switch...; Question 460: How do you configure Spanning-tree EtherChannel guard?...; Question 461: In which VTP modes can you create and delete local VLANs? (C...; Question 462: What IOS VLAN commands would create a new VLAN and assign it...; Question 463: Which protocol specified by RFC 2281 provides network redund...; Question 464: An engineer is configuring EtherChannel between two switches...; Question 465: Refer to the output below. Which effect of this configuratio...; Question 466: Which two of the following procedures can be performed on a ...; Question 467: Enablement of which feature puts the port into err-disabled ...; Question 468: Refer to the exhibit. (Exhibit) What is the result of the co...; Question 469: Which of the following features does GLBP provide, but not H...; Question 470: Which statement about restrictions for multichassis LACP is ...; Question 471: Which statement about GLBP is true?...; Question 472: Which benefit of Stackwise is true?...; Question 473: Refer to the exhibit. (Exhibit) The users in an engineering ...; Question 474: Refer to the exhibit. (Exhibit) How can the traffic that is ...; Question 475: What happens if an interface within channel group is configu...; Question 476: Which type of port can serve as a Cisco StackWise Virtual li...; Question 477: Which six optional TLVs are valid? (Choose six.)...; Question 478: When executed on a HSRP group member named Router 10, what e...; Question 479: Which two actions can be configured for storm control violat...; Question 480: Which information does CDP supply from connected devices? (C...; Question 481: Refer to the exhibit. (Exhibit) How many bytes are added to ...; Question 482: What happens if a switch with dhcp snooping and ip source gu...; Question 483: Which two statements about the local user database are true?...; Question 484: Which two configurations cause the frames to be tagged? (Cho...; Question 485: Which virtual router states are defined in the GLBP protocol...; Question 486: Which two settings are the parts of a Default LLDP configura...; Question 487: What statement is true if a new switch with a lower bridge I...; Question 488: A physical switch port is part of an EtherChannel group. Wha...; Question 489: Which option is the minimum number of bindings that the DHCP...; Question 490: Which of the following HSRP router states does an active rou...; Question 491: A network engineer is considering implementing UDLD througho...; Question 492: Instructions Enter IOS commands on the device to verify netw...; Question 493: What is required for a LAN switch to support 802.1q Q-in-Q e...; Question 494: If you have a new switch (that runs spanning-tree mode pvst+...; Question 495: Which command enables you to detect whether both sides of an...

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