Cisco
300-365 · Question #99
300-365 Question #99: Real Exam Question with Answer & Explanation
The correct answer is A: All interface traffic passes as long as one port is up.. WLC LAG bundles all ports into a single logical link with fault tolerance, symmetric traffic hashing, and port grouping as its defining characteristics versus port-based redundancy.
Wireless Deployment
Question
An engineer must create data-link redundancy for the company Cisco Wireless LAN Controller. The engineer has decided to configure LAG-based redundancy instead of port-based redundancy. Which three features of LAG-based redundancy helped steer this decision? (Choose three.)
Options
- AAll interface traffic passes as long as one port is up.
- BMultiple untagged dynamic interfaces on same port.
- CInterface connection to two separate non-stacked switches.
- DPackets are always sent out on the same port they are received on.
- EFull bandwidth of all links available.
- FPorts are grouped into multiple LAGs.
Explanation
WLC LAG bundles all ports into a single logical link with fault tolerance, symmetric traffic hashing, and port grouping as its defining characteristics versus port-based redundancy.
Common mistakes.
- B. Having multiple untagged dynamic interfaces assigned to the same port is a characteristic of port-based redundancy on the WLC, not of LAG, which consolidates all interfaces into one aggregated bundle.
- C. Connecting redundant interfaces to two separate non-stacked switches is a feature of port-based redundancy; LAG requires all member ports to terminate on the same switch or switch stack.
- E. While all LAG member ports are active, the WLC's symmetric hashing algorithm does not guarantee even traffic distribution across all links, making full utilization of all link bandwidth an unreliable distinguishing advantage of LAG.
Concept tested. WLC LAG-based vs port-based redundancy characteristics
Topics
#LAG#link aggregation#WLC redundancy#port redundancy
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