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Exam HPE6-A73 topic 1 question 40 discussion

Actual exam question from HP's HPE6-A73
Question #: 40
Topic #: 1
[All HPE6-A73 Questions]

An administrator is defining a VSX LAG on a pair of AOS-CX switches that are defined as primary and secondary. The VSX LAG fails to establish successfully with a remote switch; however, after verification, the remote switch is configured correctly. The administrator narrows down the problem to the configuration on the
AOS-CX switches.
What would cause this problem?

  • A. Local optimization was not enabled on the VSX LAG
  • B. The VSX LAG hash does not match the remote peer
  • C. The VSX LAG interfaces are in layer-3 mode
  • D. LACP was enabled in active mode on the VSX LAG
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
by Williams926 at June 16, 2021, 10:32 a.m.

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Mrvn
Highly Voted 3 years, 6 months ago
Answer should be C - VSX LAG are not supported at Layer 3 VSX LAG does support all the standard LAG adjustments: timers, L2 or L3 hashing, LACP fallback. It supports both LACP mode active or static mode, and only Layer 2 (i.e. no routed mode).
upvoted 16 times
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clupato2
Highly Voted 3 years, 4 months ago
I think it's B, because, as the question is exposed, i understand that the VSX LAG has been configured, but fails to establish. If interfaces where in Layer 3 mode, you will not be able to configure them as a LAG.
upvoted 5 times
JazzyJ151
2 years, 9 months ago
Switches can bring up VSX LAG with differently defined hashes, its not B IMO.
upvoted 1 times
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Moreson
2 years, 10 months ago
try accessing the device from lab then you will find you are wrong, and hash is not something manual configured, so not a possible human error, this question is asking for trouble shooting skills.
upvoted 1 times
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yyppy
Most Recent 2 months ago
L3 interfaces (= configured as "routing") will refuse to join the MC-LAG at first. Stupid question.
upvoted 1 times
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SeidorBruno
1 year, 6 months ago
Selected Answer: C
Page 215 Study Guide: VSX LAGs are layer 2 only, [Aruba Networks]
upvoted 4 times
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slotblocker
1 year, 7 months ago
This document says NO layer 3 interfaces for VSX LAG: https://www.arubanetworks.com/techdocs/AOS-CX/10.10/HTML/vsx/Content/Chp_Start/vsx-sol-req-10.htm Answer: C
upvoted 1 times
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Redrum702
1 year, 7 months ago
In Aruba's Virtual Switching Extension (VSX) technology, the LAG interfaces can be configured in both Layer 2 and Layer 3 modes, depending on the specific requirements of your network design
upvoted 1 times
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Redrum702
1 year, 7 months ago
B: Verify that the LAG hash settings match on both the local and remote VSX peers.
upvoted 1 times
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alex711
1 year, 10 months ago
I think B is correct. check the following link. https://www.arubanetworks.com/techdocs/AOS-CX/AOSCX-CLI-Bank/cli_6200/Content/VSX_cmds/sho-lac-agg-10.htm
upvoted 4 times
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Jo2241
2 years, 2 months ago
Selected Answer: C
I think C is the good answer. VSX LAG are not supported at Layer 3
upvoted 2 times
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Davidkanigui
3 years, 6 months ago
B is correct.
upvoted 1 times
Disposable_Me_2018
3 years, 3 months ago
Pretty sure that switches do not negotiate the lag hash algorithm in the handshake. Cannot be B. I vote for C.
upvoted 1 times
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Williams926
3 years, 6 months ago
I think D is correct.
upvoted 1 times
gbermudez11
3 years, 6 months ago
Why do you think it is correct?
upvoted 1 times
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C (25%)
B (20%)
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