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

IT AI Recommendation 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; its answers are read by the distilled judge (ai-indexes-judge-qwen3-14b-run3), not the claude-opus-5 judge of the earlier categories. Page: https://it-ai-index.com/network/data-center-networking/

**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

| # | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | Arista Networks | 27% | 13% | 45 |
| 2 | Cisco | 5% | 32% | 28 |
| 3 | HPE Aruba | 2% | 8% | 12 |
| 4 | Cisco Nexus | 2% | 19% | 16 |
| 5 | Juniper Networks | 0% | 19% | 26 |
| 6 | VMware NSX | 0% | 44% | 16 |
| 7 | Cisco ACI | 0% | 58% | 12 |

## 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 Technologies, HPE Juniper Networking
- Perplexity Sonar: Cisco Nexus; alternatives Arista Networks, HPE Data Center Switches
- Grok 4.1 Fast: HPE Aruba Networking CX Series; alternatives Cisco Nexus, Juniper Networks
- Mistral Small: Cisco; 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, HPE Aruba; alternatives Juniper EX Series
- Kimi K2: HPE Aruba Networking CX Series; alternatives Cisco Nexus 9000, Juniper QFX Series
- GLM 4.7 FlashX: HPE Aruba Networking CX Series; alternatives Cisco Catalyst 9200/9300 Series, Cisco Nexus 9300 Series, Dell PowerSwitch S Series
- MiniMax M2.5: no first choice
- GPT-6 Luna: Arista EOS; alternatives Cisco Nexus 9000, 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: 9 of 28 labels negative. "Some Gartner clients report higher rates of issues compared to other vendors, typically around product complexity, software quality, and support timeliness" (MiniMax M2.5, 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://it-ai-index.com/methodology/
- Raw judge labels and full responses: https://it-ai-index.com/data/
- License: CC BY 4.0. Cite as IT AI Recommendation Index, October 2026 Edition, it-ai-index.com.