Exam 300-115 topic 1 question 95 discussion

Actual exam question from Cisco's 300-115

Question #: 95
Topic #: 1

[All 300-115 Questions]

Which statement about restrictions for multichassis LACP is true?

A. It is available only on a Cisco Catalyst 6500 Series chassis.
B. It does not support 1Gb links.
C. Converting a port channel to mLACP can cause a service disruption.
D. It is not available in VSS.

Show Suggested Answer

Suggested Answer: C 🗳️
When configuring mLACP for Server Access, follow these guidelines and restrictions:
✑ PFC3A mode does not support the mLACP for server access feature.
✑ VSS mode does not support the mLACP for server access feature.
✑ No more than 100 VLANs can be active on a switch configured as a PoA.
✑ mLACP does not support half-duplex links.
✑ mLACP does not support multiple neighbors.
.
✑ Converting a port channel to mLACP can cause a service disruption
✑ The DHD system priority must be lower (higher numerically) than the PoA system priority.
Reference: http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/mlacp_server_support.html

by SavedFACPR at Aug. 17, 2019, 1:21 a.m.

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SavedFACPR

5 years, 10 months ago

Would not C and D be correct as it is also not available in VSS mode?

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yeti1

5 years, 6 months ago

mLACP is used to negotiate MCEC (multi chassis etherchannel). Actually the only way you can run this is with a pair of 6500s or 6800s in VSS mode. No other switches support MCEC. I had this running at my old job and can confirm MCEC/mLACP worsks fine with Catalyst 6500 VSS. A bit of a nasty question, as without experience with 6500 VSS you would really have no way to know this, and no one would have 6500s in a ccnp learning lab.

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