Podcast
Questions and Answers
How is the interface port connection designated as Yellow or Green?
How is the interface port connection designated as Yellow or Green?
- By the MAC address (correct)
- By the type of cable used
- By the switch model
- By the port number
What happens to diagnostic messages when a crossover cable is removed?
What happens to diagnostic messages when a crossover cable is removed?
- They are intensified
- They are isolated (correct)
- They are forwarded to additional ports
- They are transmitted faster
What indicates a crosslink error in the FTE Status display?
What indicates a crosslink error in the FTE Status display?
- Green messages on the Green tree
- Healthy paths displayed in red
- Healthy paths displayed in green despite errors (correct)
- Yellow messages on the Yellow tree
What might be a possible cause of the crosslink error?
What might be a possible cause of the crosslink error?
What color connection is assigned to the interface port with the higher MAC address?
What color connection is assigned to the interface port with the higher MAC address?
Which of these is a direct consequence of crosslink errors?
Which of these is a direct consequence of crosslink errors?
What must be consistent to maintain the correct interface port designation?
What must be consistent to maintain the correct interface port designation?
What visual cue indicates that diagnostic messages are traversing throughout the network?
What visual cue indicates that diagnostic messages are traversing throughout the network?
Which message should NOT be seen on the Green tree after isolating the trees?
Which message should NOT be seen on the Green tree after isolating the trees?
In an ideal scenario, what is expected to happen after the crossover cable is removed?
In an ideal scenario, what is expected to happen after the crossover cable is removed?
What occurs in the FTE Status Display when the crossover cable is removed and crosslink errors are present?
What occurs in the FTE Status Display when the crossover cable is removed and crosslink errors are present?
Which of the following is NOT a requirement for isolating diagnostic messages in FTE trees?
Which of the following is NOT a requirement for isolating diagnostic messages in FTE trees?
How is the designation of the interface port connection important in the network?
How is the designation of the interface port connection important in the network?
What does a yellow booted cable connected improperly at the node indicate?
What does a yellow booted cable connected improperly at the node indicate?
What could be a consequence of having a crossover cable between two isolated FTE trees?
What could be a consequence of having a crossover cable between two isolated FTE trees?
When cables are cross-connected at the node, what outcome is likely for the system's performance?
When cables are cross-connected at the node, what outcome is likely for the system's performance?
Which condition must be true for an interface port connection to function correctly?
Which condition must be true for an interface port connection to function correctly?
What is typically observed in the FTE trees when a crossover cable is in use?
What is typically observed in the FTE trees when a crossover cable is in use?
What should be done in the event of a crosslink error detected in the system?
What should be done in the event of a crosslink error detected in the system?
Why must diagnostic messages be isolated to their designated trees?
Why must diagnostic messages be isolated to their designated trees?
Study Notes
Crosslink Errors
- Diagnostic messages are sent to FTE interface ports.
- Interface ports can be designated as Yellow or Green based on the MAC address.
- The lower MAC address is typically designated as Yellow, while the higher is Green.
- Crossover cables between switches transmit Yellow and Green diagnostic messages on both FTE trees.
- FTE trees must be isolated to ensure message isolation.
- Removing the crossover cable should result in Yellow messages only on the Yellow tree and Green messages only on the Green tree.
- A crosslink error occurs when diagnostic messages incorrectly appear on the opposite tree even after isolation.
- This is observed as a healthy path displayed in green on the FTE Status Display, even though it should be red.
- A potential cause of a crosslink error is cables being cross-connected at the node.
- For example, a cable with a Yellow boot may be connected to the second port of the Green switch.
Crosslink Errors In FTE Trees
- Diagnostic messages are sent between interface ports on FTE trees, identified as Yellow or Green.
- The MAC address determines the interface port connection as Yellow or Green: the lower MAC address is Yellow, the higher MAC address is Green.
- Crosslink errors occur when Yellow diagnostic messages are seen on the Green tree, or vice versa, even after removing the crossover cable.
- This error indicates a misconfiguration or connectivity issue.
- A possible cause could be that cables are cross-connected at the node, meaning the Yellow cable connects to the second port on the Yellow tree switch, and the Green cable connects to the first port on the Green tree switch.
What to look for
- FTE Status Display:
- If the crossover cable is present, all connections should be operational and diagnostic messages should traverse the network.
- After removing the crossover cable, status for paths A to B and B to A should go red. If they remain green, it signifies a crosslink error.
- Diagnostic message flow:
- Yellow diagnostic messages should not be seen on the Green tree, and vice versa, even after removing the crossover cable.
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Description
Explore the concept of crosslink errors in FTE systems. This quiz covers the diagnostic messages, MAC address designations, and the importance of message isolation within FTE trees. Test your understanding of how crossover cables can impact message transmission between interface ports.
