A rail-optimized network connects what to the same leaf switches?
Why C is the answer
The same-numbered NICs across servers
Matching NICs share a rail, which keeps paths short for collectives.
In detail
- Matching NICs share a rail, which keeps paths short for collectives.
- This keeps paths short for collectives.
Use case
An illustrative scenario, not a real incident.
NIC 1 on every server connects to one leaf, NIC 2 to another, and so on.
See it in different ways
mindmap
root((Links))
Short
Direct attach copper
Long
Optical transceivers
Layout
Rail-optimized
Proof
Cabling map
Error countersmindmap
root(("Rail-optimized network"))
n1["Rail 1"]
n2["NIC 1 of each server"]
n3["Rail 2"]
n4["NIC 2 of each server"]Key point: Rails connect matching NICs.
Why the other options are wrong
- A. All BMC ports to the storage switch
- BMCs use a separate network.
- B. All GPUs to the management switch
- GPUs do not connect to that switch directly.
- D. All NICs of one server to one leaf
- That removes the rail design.