What is a benefit of link aggregation?
A. Optimizes fabric performance by distributing network traffic across ISLs.
B. Improves ISL utilization by increasing the network traffic on a specific ISL.
C. Yields a higher throughput by combining two parallel ISLs into a single physical ISL.
D. Saves bandwidth by restricting traffic to a specific potentially congested ISL.
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Correct Answer: A
ISM V4 P322：
Link aggregation combines two or more parallel ISLs into a single logical ISL,
called a port-channel, yielding higher throughput than a single ISL could provide.
For example, the aggregation of 10 ISLs into a single port-channel provides up to
160 Gb/s throughput assuming the bandwidth of an ISL is 16 Gb/s. Link
aggregation optimizes fabric performance by distributing network traffic across the
shared bandwidth of all the ISLs in a port-channel. This allows the network traffic
for a pair of node ports to flow through all the available ISLs in the port-channel
rather than restricting the traffic to a specific, potentially congested ISL. The
number of ISLs in a port channel can be scaled depending on application’s
performance requirement.
So for C: parallel ISLs are not necessarily two. So A is the correct answer.
“A” is correct !
Link aggregation combines two or more parallel ISLs into a single _logical_ ISL, called a port-channel, yielding higher throughput than a single ISL could provide.
For example, the aggregation of 10 ISLs into a single port-channel provides up to 160 Gb/s throughput assuming the bandwidth of an ISL is 16 Gb/s.
! Link aggregation optimizes fabric performance by distributing network traffic across the shared bandwidth of all the ISLs in a port-channel.! This allows the network traffic for a pair of node ports to flow through all the available ISLs in the port-channel rather than restricting the traffic to a specific, potentially congested ISL. The number of ISLs in a port channel can be scaled depending on application’s performance requirement.
i think it should be C.