Fichas
Etherchannel and STP
Fichas del conjunto (27)
- 1What is an etherchannel?A group of ports that act as one. It is the act of combining ports, their bandwidth, and balance load.
- 2Define PAgP and LACP.Port Aggregation Protocol
Link Aggregation Control Protocol
These negotiation protocols are recommended to avoid misconfiguration. - 3How many interfaces on an etherchannel?Eight.
- 4What are the requirements to be able to add an interface to an etherchannel.They must be on the same duplex, speed, port mode, same VLAN, and must have the same STP interface settings (like port priority).
- 5What are the port modes and which etherchannel protocol do they correspond with?On/On = static, Desirable/Desirable = PAgP, Desirable/Auto = PAgp, Active/Active = LACP, Active/Passive = LACP.
- 6State he commands for setting interface range, configuring a channel group, showing the summary, and interface port channel."interface range (interface range)"
"channel-group (#)"
"channel-group mode (active|passive|auto|desirable|on)"
"show etherchannel summary"
"show interface port-channel (#)" - 7What is the difference between L2 and L3 etherchannel?They are the same, but L3 uses IP addresses.
- 8State the commands to configure and verify L3 etherchannel.“interface range (int range; ex. Fastethernet 0/1-2)”
“no switchport”
“channel-group (#) mode (on|off)”
“show etherchannel (#) summary”
“interface port-channel (#)”
“ip address (IP) (mask)” - 9How are broadcast storms created?Switches flood a message out all ports when they don't know where it goes. Switches have to continuously update their MAC tables.
- 10What are the steps in establishing STP?1. Elect a root bridge.
2. Place root interfaces into a forwarding state.
3. Each non-root selects it's root port.
4.Remaining links choose a designated port.
5. All other ports are put into a blocking state. - 11What does PVST+ do?Allows you to configure STP differently on different VLANs, like have a different root.
- 12What is a root port?The best port to reach the bridge.
- 13What is a designated port?A port with the best route to the bridge on a link.
- 14What are the six STP states (state definitions as well)?Blocking: a port that is blocking traffic.
Listening: not forwarding and not learning.
Disabled: a port that is shutdown.
Learning: not forwarding but is learning.
Forwarding: sending and receiving traffic as normal. - 15What are transitional states?Listening and learning are transitional states, meaning devices will be in these states when switching to another.
- 16How is the root bridge elected?Each switch has a BPDU (root cost, root, and local Bridge ID). The lowest BID is the root. BID = priority+MAC address.
- 17what is the default priority of STP?32,769
- 18What is the root cost?The root cost is the collection of each port to the root.
- 19What is cost based off of?The speed of the connection.
- 20What if the root cost is the same? Then who becomes the root?The lowest BID, lowest neighbor port priority, or the lowest neighbor port number defines who becomes the root.
- 21What port do switches send information out of?The one with the lowest cost.
- 22What defines which port becomes the root port?Lowest neighbor BID, lowest port priority, or lowest neighbor port number will define what becomes the root port.
- 23How are designated ports selected?By comparing the lowest root cost to the bridge, the lowest BID, the lowest port priority, then the lowest port number.
- 24What are the default times of hello times, max age times, and forward delay times?Hello messages are sent out every 2 seconds by default, the max age timer is 10x the hello timer making it 20 seconds, and the forward delay time is by default 15 seconds.
- 25What is forward delay time?The time between listening and learning states.
- 26In what order do the states change?Forwarding goes to blocking, blocking goes to listening, listening goes to learning, learning goes to forwarding.
- 27What is IEEE standard 802.1d?Spanning Tree Protocol.
Información
- Descripción
- CCNA CCNA 2020 Fichas sobre Etherchannel and STP, creado por Aliyah Merritt el 02/06/2020.
- Creado por
- Aliyah Merritt
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