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myCCNP Switch 300-115 > SPAN Ports > Flashcards

SPAN Ports Flashcards

1
Q

What are SPAN ports and what are they used for?

A

SPAN ports mirror all traffic to and/or from a source port to a destination port. They are used to send traffic to packet-capture software.

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2
Q

Do SPAN source and destination ports have to be run on the same switch?

A

No, SPAN source and destination ports can reside on entirely different devices.

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3
Q

What must be configured to run SPAN ports locally on one switch?

A

A SPAN session, a SPAN source port, and a SPAN destination port.

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4
Q

What options can you configure when setting up your SPAN ports?

A

To mirror transmit data. receive data, or both; or specify a VLAN to be mirrored.

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5
Q

When configuring SPAN on two remote devices, what must be configured in addition to your source and destination ports?

A

A SPAN VLAN that runs on both switches and across all intermediary switches.

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6
Q

True or false: SPAN VLANs must be configured as such on all switches they exist on.

A

True.

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7
Q

When configuring remote span, the SPAN VLAN is configured as the __ on the source switch and the __ on the destination switch.

A

Destination port on the source switch, source on the destination switch.

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8
Q

A destination port is always going to be in what kind of state?

A

Down/down.

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9
Q

What is mirrored to a destination port by default, and what tags can change this?

A

Transit and receive data, the tx and rx tags can change this.

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10
Q

Can you mirror a port channel?

A

Yes, you can mirror a port channel or just an individual port in a port channel.

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11
Q

Can trunks act as source ports?

A

Yes, and by default all VLANs will be mirrored.

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12
Q

Can a interface serve as a source and destination port?

A

No, it can only be one or the other.

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13
Q

What can you specify as a SPAN source in addition to interfaces?

A

Entire VLANs, also known as VSPANS.

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14
Q

Port channels cannot serve as ___.

A

Destination ports.

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15
Q

How many sessions can a destination port be active in?

A

Only one.

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16
Q

What do destination ports NOT participate in?

A

STP, VTP, DTP, and port channels.

17
Q

interface GigabitEthernet0/1
switchport
switchport mode trunk
switchport trunk allowed vlan 1-100
!
interface GigabitEthernet0/48
switchport
switchport mode access
!
monitor session 1 source interface GigabitEthernet0/1
monitor session 1 destination interface GigabitEthernet0/48

How can the traffic that is mirrored out the GigabitEthernet0/48 port be limited to only traffic that is received or transmitted in VLAN 10 on the GigabitEthernet0/1 port?

A

monitor session 1 filter vlan 10

Apply the monitor session filter globally to allow only traffic from VLAN 10

18
Q

A network engineer wants to analyze all incoming and outgoing packets for an interface that is connected to an access switch. Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three)

A
  • A remote SPAN VLAN on the distribution and access layer switch
  • A monitor session on the access switch with a physical interface source and the remote SPAN VLAN as the destination
  • A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical interface as the destination
19
Q

Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. This command is configured globally:

monitor session 2 filter vlan 1 – 8, 39, 52

What is the result of the implemented command

A

Traffic from VLANs 1 to 8, 39, and 52 is replicated to the SPAN destination port

20
Q

A network engineer investigates a recent network failure and notices that one of the interfaces on the switch is still down. What is causing the line protocol on this interface to be shown as down?

A

The interface is configured as the target of the SPAN session

21
Q

Define SPAN

A

A method of collecting traffic received on a switch port or a VLAN and sending it to specific destination ports on the same switch.

22
Q

Define RSPAN

A

A method of collecting traffic received on a switch port or a VLAN and sending it to specific destination ports on a switch other than the one on which it was received.

23
Q

Define remote VLAN

A

The destination VLAN for an RSPAN session.

24
Q

Define monitor session

A

The command used to initialize a SPAN or RSPAN session on a Catalyst switch.

25
Q

Define encapsulation replication

A

Regeneration of the Layer 2 encapsulation removed from frames forwarded in a SPAN session.

26
Q

What does *SPAN* stand for?

A

Switchport Analyzer

27
Q

What is *SPAN*?

A

SPAN is a feature that allows you to copy ingress traffic from port or VLAN, which is then sent to an egress port for observation.

28
Q

What does RSPAN stand for?

A

Remote Switchport Analyzer

29
Q

What is RSPAN?

A

RSPAN is a feature that allows you to capture traffic on one switch and send it over a remote switch as long as the switches have a layer 2 connection with each other.

30
Q

How is a RSPAN set up?

A

A RSPAN is set up by utilizing a remote VLAN and a reflector port.

31
Q

What is a reflector port in RSPAN?

A

A reflector port is set up on the destination bridge, and is essentially an unused port. The reflector port’s ASIC is stolen to handle the forwarding logic.

32
Q

What configuration commands sets up *RSPAN*?

A

CONFIGURATION SOURCE

  • Sw1(config)# vlan 200
  • Sw1(config-vlan)# remote-span
  • Sw1(config)# monitor session 1 source interface Eth1/1
  • Sw1(config)# monitor session 1 destination remote vlan 200 reflector-port Eth1/2

CONFIGURATION DESTINATION

  • Sw2(config)# vlan 200
  • Sw2(config-vlan)# remote-span
  • Sw2(config)# monitor session 1 source remote vlan 200
  • Sw2(config)# monitor session 1 destination Eth1/3

myCCNP Switch 300-115 (73 decks)

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