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Routing > Module 4 > Flashcards

Module 4 Flashcards

1
Q

What is the main objective of the module on Inter-VLAN Routing?

A

Troubleshoot inter-VLAN routing on Layer 3 devices.

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2
Q

What are the three options for inter-VLAN routing?

A
  • Legacy Inter-VLAN routing
  • Router-on-a-Stick
  • Layer 3 switch using switched virtual interfaces (SVIs)
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3
Q

What is required for Router-on-a-Stick inter-VLAN routing?

A

Create a subinterface for each VLAN to be routed.

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4
Q

What command is used to create a subinterface in Router-on-a-Stick configuration?

A

interface interface_id.subinterface_id

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5
Q

What does the command ‘encapsulation dot1q vlan_id’ do?

A

Configures the subinterface to respond to 802.1Q encapsulated traffic from the specified VLAN.

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6
Q

What command assigns an IP address to a subinterface in Router-on-a-Stick?

A

ip address ip-address subnet-mask

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7
Q

What must be done after creating all subinterfaces in Router-on-a-Stick?

A

Enable the physical interface using the ‘no shutdown’ command.

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8
Q

How do you verify connectivity between two hosts in different VLANs?

A

Use the ‘ping’ command.

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9
Q

List the commands used to verify and troubleshoot Router-on-a-Stick configuration.

A
  • show ip route
  • show ip interface brief
  • show interfaces
  • show interfaces trunk
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10
Q

What are the advantages of using Layer 3 switches for inter-VLAN routing?

A
  • Faster processing rates
  • No need for external links to a router
  • Not limited to one link due to EtherChannels
  • Lower latency
  • Commonly deployed in campus LANs
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11
Q

What is an SVI?

A

A switched virtual interface configured on a Layer 3 switch.

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12
Q

What command is used to enable IP routing on a Layer 3 switch?

A

ip routing

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13
Q

What is the limitation of the legacy inter-VLAN routing method?

A

Not reasonably scalable due to the limited number of physical interfaces on routers.

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14
Q

Is the router-on-a-stick method scalable beyond 50 VLANs?

A

False.

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15
Q

What is the first step in configuring a Layer 3 switch for inter-VLAN routing?

A

Create the VLANs.

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16
Q

Fill in the blank: The router-on-a-stick method requires a ______ for each VLAN to be routed.

A

subinterface

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17
Q

True or False: Layer 3 switches operate only at Layer 2.

A

False.

18
Q

What is the primary function of an SVI?

A

Provides Layer 3 processing for packets sent to or from switch ports associated with that VLAN.

19
Q

What command is used to create an SVI for a VLAN?

A

interface vlan vlan-id

20
Q

What is required to configure trunking ports on a switch?

A

Configure trunking ports after creating VLANs and access ports.

21
Q

What is the primary function of Layer 3 switches in enterprise campus LANs?

A

To provide inter-VLAN routing

22
Q

How do Layer 3 switches achieve higher packet processing rates than routers?

A

By using hardware-based switching

23
Q

What command is used to create a switched virtual interface (SVI) on a Layer 3 switch?

A

interface vlan vlan-id

24
Q

What must be configured on a Layer 3 switch to enable routing?

A

A routed port must be configured

25
Q

What command disables the switchport feature on a Layer 2 port?

A

no switchport

26
Q

What are the steps to configure a Layer 3 switch to route with a router?

A
  • Configure the routed port
  • Enable routing
  • Configure routing
  • Verify routing
  • Verify connectivity
27
Q

What are common reasons for inter-VLAN configuration failures?

A
  • Missing VLANs
  • Switch trunk port issues
  • Switch access port issues
  • Router configuration issues
28
Q

What is a common cause of issues in a router-on-a-stick configuration?

A

Misconfigured trunk port

29
Q

Which command can be used to verify the subinterface status in a router-on-a-stick configuration?

A

show ip interface brief

30
Q

When troubleshooting switch access port issues, which command can help verify interface VLAN assignment?

A

show vlan brief

31
Q

What command is used to enable routing on a Layer 3 switch?

A

ip routing

32
Q

What is the command to verify the routing table on a Layer 3 switch?

A

show ip route

33
Q

What is the purpose of the command ‘encapsulation dot1q X [native]’?

A

To configure subinterfaces for VLANs on a router

34
Q

Fill in the blank: A _______ is created on a Layer 3 switch by disabling the switchport feature on a Layer 2 port.

A

routed port

35
Q

True or False: In a legacy inter-VLAN solution, a misconfigured switch port could be caused when the connecting router port is not assigned to the correct VLAN.

A

True

36
Q

What command can be used to verify VLAN membership of a port?

A

show interfaces switchport

37
Q

What is the first step to troubleshoot inter-VLAN routing issues?

A

Check the physical layer for cable connections

38
Q

What happens to ports assigned to a VLAN when that VLAN is deleted?

A

They become inactive until reassigned to a new VLAN

39
Q

What should be checked if the port connecting to the router is missing from the trunk output?

A

Examine the configuration of the port using show running-config interface X

40
Q

What is required for VLANs to be reachable by other Layer 3 devices?

A

They must be advertised using static or dynamic routing

Routing (19 decks)

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