# Data center networking: what AI models recommend, October 2026

Gane Index, October 2026 Edition. Asked as "data center switching platform" and as "data center network fabric", six framings each, to fourteen models with search on, on behalf of a mid-market B2B company. Added to the October 2026 Edition on October 4, 2026. Page: https://www.gane.ai/index/it/network/data-center-networking/2026-10

This is the permanent record of the October 2026 Edition, published October 1, 2026 and superseded since. The current standing: https://www.gane.ai/index/it/network/data-center-networking/index.md

**Standing:** Arista Networks leads with 27% of first choices; verdict contested. 44 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| Rank | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | [Arista Networks](https://www.gane.ai/index/it/vendors/arista-networks/index.md) | 27% | 13% | 45 |
| 2 | [Cisco Nexus](https://www.gane.ai/index/it/vendors/cisco-nexus/index.md) | 7% | 32% | 53 |
| 3 | [Dell PowerSwitch](https://www.gane.ai/index/it/vendors/dell-powerswitch/index.md) | 7% | 6% | 17 |
| 6 | [HPE Aruba CX Series](https://www.gane.ai/index/it/vendors/hpe-aruba-cx-series/index.md) | 5% | 7% | 14 |
| 21 | [Juniper Networks](https://www.gane.ai/index/it/vendors/juniper-networks/index.md) | 0% | 19% | 26 |
| 143 | [VMware NSX](https://www.gane.ai/index/it/vendors/vmware-nsx/index.md) | 0% | 44% | 16 |
| 144 | [Cisco ACI](https://www.gane.ai/index/it/vendors/cisco-aci/index.md) | 0% | 58% | 12 |

Rank is by share of first choices among all 144 products named; products with the same share are tied, and the order among them carries no meaning. The table lists those with at least 10 labels.

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: no first choice
- GPT-5.4 mini: Arista Networks; alternatives Cisco Nexus, Juniper QFX
- Gemini 3.5 Flash: Arista Networks; alternatives Dell PowerSwitch, HPE Juniper Networking
- Perplexity Sonar: Cisco Nexus; alternatives Arista Networks, HPE Data Center Switches
- Grok 4.20: HPE Aruba Networking CX Series; alternatives Cisco Nexus, Juniper Networks
- Mistral Small: Cisco Nexus; alternatives Arista Networks, Huawei Data Center Networking, Juniper Networks
- DeepSeek V4 Flash: HPE Aruba CX Series; alternatives Extreme Networks, Juniper QFX Series
- Llama 4 Maverick: no first choice
- Qwen 3.7 Flash: Cisco Nexus, HPE Aruba CX Series; alternatives Juniper EX Series
- Kimi K2: HPE Aruba Networking CX Series; alternatives Cisco Nexus, Juniper QFX Series
- GLM 4.7 FlashX: HPE Aruba Networking CX Series; alternatives Cisco Catalyst, Cisco Nexus, Dell PowerSwitch
- MiniMax M2.5: no first choice
- GPT-6 Luna: Arista EOS; alternatives Cisco Nexus, CloudVision, HPE Juniper QFX + Apstra
- Muse Glimmer 30B: HPE Aruba EdgeConnect; alternatives Arista Networks, Juniper Networks

## Sources the answers cite

75 of 84 answers came back with a source list, from 14 of 14 models. Sites named in the most answers:

- cisco.com: 44 answers, 85 citations
- g2.com: 28 answers, 35 citations
- juniper.net: 26 answers, 42 citations
- gartner.com: 26 answers, 39 citations
- arista.com: 23 answers, 37 citations
- peerspot.com: 22 answers, 35 citations
- hpe.com: 20 answers, 24 citations
- linkedin.com: 18 answers, 23 citations

Pages named in the most answers:

- https://gartner.com/reviews/market/data-center-switching (14 answers)
- https://g2.com/categories/networking-hardware (13 answers)
- https://prodisknetwork.com/blog/cisco-vs-aruba-vs-juniper-vs-arista-switch-comparison (12 answers)
- https://peerspot.com/categories/data-center-networking (11 answers)
- https://us.fitgap.com/search/data-center-networking-solutions/small-business (11 answers)
- https://cisco.com/c/dam/en_us/partners/downloads/lean-ai-ready-data-center-blueprint.pdf (10 answers)
- https://cisco.com/site/us/en/products/networking/cloud-networking-switches/index.html (10 answers)
- https://digitechbytes.com/vetted/best-data-center-switch (9 answers)
- https://g2.com/categories/data-center-networking (9 answers)
- https://gartner.com/reviews/market/data-center-and-cloud-networking (9 answers)

## Warned against

- Cisco Nexus: 17 of 53 labels negative. "The architecture is very old... migration to Nexus 9000 (or Arista 7000/7050) is highly recommended" (Qwen 3.7 Flash, negative prompt)
- VMware NSX: 7 of 16 labels negative. "Don't over-engineer with ACI/NSX. Cisco ACI and VMware NSX are powerful but carry significant complexity and cost" (DeepSeek V4 Flash, paraphrase prompt)
- Arista Networks: 6 of 45 labels negative. "Cisco ACI, Nexus 9000 with extensive features enabled, or overly rich SD‑N stacks can introduce configuration‑driven bugs if not fully tested." (GLM 4.7 FlashX, negative prompt)
- Cisco ACI: 7 of 12 labels negative. "What I'd Avoid: | Cisco ACI | Overly complex and expensive for mid-sized environments" (Kimi K2, paraphrase prompt)

## Record

- Method: https://www.gane.ai/index/it/methodology
- License: CC BY 4.0. Cite as Gane Index, October 2026 Edition, www.gane.ai/index/it.