--- title: Select the Best Switching ASIC For the Job « ipSpace.net... description: A practical guide to selecting the right Broadcom switching ASIC for each role in a leaf-and-spine data center fabric. Spine switches benefit from the Tomahawk... canonical: https://daily.dev/posts/select-the-best-switching-asic-for-the-job-ipspace-net-blog-svabjvkkn twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Select the Best Switching ASIC For the Job « ipSpace.net blog | daily.dev og:description: A practical guide to selecting the right Broadcom switching ASIC for each role in a leaf-and-spine data center fabric. Spine switches benefit from the Tomahawk... og:url: https://daily.dev/posts/select-the-best-switching-asic-for-the-job-ipspace-net-blog-svabjvkkn og:image: https://api.daily.dev/og/posts/SVaBJvKkn.png og:image:alt: Select the Best Switching ASIC For the Job « ipSpace.net blog og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Select the Best Switching ASIC For the Job « ipSpace.net blog **[ipSpace.net Blog](https://daily.dev/sources/ipspace)** · 3 min read · 0 upvotes · 0 comments ## Summary A practical guide to selecting the right Broadcom switching ASIC for each role in a leaf-and-spine data center fabric. Spine switches benefit from the Tomahawk series — high throughput, small buffers, small MAC/ARP tables — best suited for routed fabrics with VXLAN transport. Leaf switches fit the Trident series, offering larger buffers and more complex forwarding like VXLAN routing. Deep-buffer switches are reserved for specific incast scenarios: WAN edge, scatter-gather workloads (Map/Reduce), and iSCSI targets. Key table sizes cited: Tomahawk supports 8K MAC, 16K ARP, 640K IPv4 LPM, and 160K IPv6 LPM routes. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What are the forwarding table limits of the Broadcom Tomahawk ASIC for use as a spine switch? The Broadcom Tomahawk ASIC has an 8K MAC table and 16K ARP table, making it unsuitable for large layer-2 fabrics. However, it supports 640K IPv4 LPM routes and 160K IPv6 LPM routes, making it well-suited as a core switch in a routed fabric. Its small buffers and limited L2 tables mean it should only connect to leaf switches, not servers or WAN links. _Network engineers sizing spine switches for routed fabrics track ASIC table limits like these on daily.dev._ ### When do I actually need a deep buffer switch in a data center fabric? Deep buffer switches are needed only in specific incast scenarios: WAN edge connections, applications with scatter-gather behavior such as Map/Reduce, and environments where many hosts write to the same iSCSI target. Outside these cases, standard leaf switches with moderate buffers are sufficient. Deep buffer switches are expensive but still cheaper per gigabit than WAN edge routers. _Engineers designing data center fabrics for storage or analytics workloads find relevant tradeoff discussions on daily.dev._ ### Which Broadcom ASIC family is best for leaf switches in a leaf-and-spine data center fabric? The Broadcom Trident series is the standard fit for leaf switches. It provides larger buffers than Tomahawk, larger MAC/ARP forwarding tables (important when connecting containers directly to the fabric), and supports more complex packet forwarding functions such as VXLAN routing — capabilities that spine switches typically do not need. _Architects choosing between Trident and Tomahawk for specific fabric roles find comparative coverage on daily.dev._ ## Similar posts on daily.dev - [Designing an Ethernet Switch ASIC](https://daily.dev/posts/designing-an-ethernet-switch-asic-rmi8a0xuo) · Hacker News · 0 upvotes · 0 comments - [AI network performance with Cisco Intelligent Packet Flow](https://daily.dev/posts/ai-network-performance-with-cisco-intelligent-packet-flow-djlgfdbki) · Cisco · 0 upvotes · 0 comments --- [View this post on daily.dev](https://daily.dev/posts/select-the-best-switching-asic-for-the-job-ipspace-net-blog-svabjvkkn) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Select the Best Switching ASIC For the Job « ipSpace.net blog","url":"https://daily.dev/posts/select-the-best-switching-asic-for-the-job-ipspace-net-blog-svabjvkkn","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/select-the-best-switching-asic-for-the-job-ipspace-net-blog-svabjvkkn"},"datePublished":"2026-08-11T08:52:26.716Z","dateModified":"2026-08-11T09:06:36.517Z","description":"A practical guide to selecting the right Broadcom switching ASIC for each role in a leaf-and-spine data center fabric. 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