Exam 350-601 topic 1 question 283 discussion

Actual exam question from Cisco's 350-601

Question #: 283
Topic #: 1

DRAG DROP -

Refer to the exhibit. The Cisco Nexus Series Switches SW1, SW2, and SW3 are connected via Layer 2 copper interfaces. An engineer implements loop prevention standard IEEE 802.1w on each VLAN to provide faster recovery from network changes or failures. The implementation has these requirements:
✑ Interfaces that are connected to Layer 2 hosts must not receive STP BPDUs.
✑ The implementation must detect unidirectional links due to one-way traffic twisted-pair links.
✑ Bridge assurance must be enabled between SW2 and SW3.
✑ The Layer 2 domain must be protected from superior BPDUs that arrive from external switches.
Drag and drop the code snippets from the right onto the blanks in the code on the left to complete the configuration for SW3. Not all code snippets are used.
Select and Place:

Show Suggested Answer

Suggested Answer:

by hewi at Sept. 2, 2022, 2:04 p.m.

Comments

Submit Cancel

7korn7

Highly Voted 8 months ago

Config on sw3 must be like this: interface ethernet 1/4 spanning-tree port type network udld aggressive interface ethernet 1/5 spanning-tree guard root interface ethernet 1/6 spanning-tree port type edge Explanation: In the question, we have 4 most important requirements: ✑ Interfaces that are connected to Layer 2 hosts must not receive STP BPDUs. ✑ The implementation must detect unidirectional links due to one-way traffic twisted-pair links. ✑ Bridge assurance must be enabled between SW2 and SW3. ✑ The Layer 2 domain must be protected from superior BPDUs that arrive from external switches. 1st: command spanning-tree port type edge disables stp process on port 2nd: udld aggressive enables UDLD in aggressive mode 3rd: Bridge assurance is enabled globally by default on NX-OS. However, we do have to change the spanning-tree port type to network on interfaces 4th: Root guard is enabled with the interface command spanning-tree guard root. Root guard is placed on designated ports toward other switches that should never become root bridges.

upvoted 11 times

...

GuyThatTakesDumps

Most Recent 7 months, 3 weeks ago

korn7 is right!

upvoted 3 times

...

hewi

8 months, 3 weeks ago

isn't it spanning-tree port type network udld normal ?

upvoted 1 times

elmodude

8 months, 2 weeks ago

Almost. It's "spannig-tree port type network" udld "aggressive" Normal will not work for copper, only Aggressive. https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swudld.pdf

upvoted 1 times

...