SPAN Ports Flashcards
What are SPAN ports and what are they used for?
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.
Do SPAN source and destination ports have to be run on the same switch?
No, SPAN source and destination ports can reside on entirely different devices.
What must be configured to run SPAN ports locally on one switch?
A SPAN session, a SPAN source port, and a SPAN destination port.
What options can you configure when setting up your SPAN ports?
To mirror transmit data. receive data, or both; or specify a VLAN to be mirrored.
When configuring SPAN on two remote devices, what must be configured in addition to your source and destination ports?
A SPAN VLAN that runs on both switches and across all intermediary switches.
True or false: SPAN VLANs must be configured as such on all switches they exist on.
True.
When configuring remote span, the SPAN VLAN is configured as the __ on the source switch and the __ on the destination switch.
Destination port on the source switch, source on the destination switch.
A destination port is always going to be in what kind of state?
Down/down.
What is mirrored to a destination port by default, and what tags can change this?
Transit and receive data, the tx and rx tags can change this.
Can you mirror a port channel?
Yes, you can mirror a port channel or just an individual port in a port channel.
Can trunks act as source ports?
Yes, and by default all VLANs will be mirrored.
Can a interface serve as a source and destination port?
No, it can only be one or the other.
What can you specify as a SPAN source in addition to interfaces?
Entire VLANs, also known as VSPANS.
Port channels cannot serve as ___.
Destination ports.
How many sessions can a destination port be active in?
Only one.
