--- title: The Impact of Jumbo Maximum Frame Size on Data Center... description: Explores whether setting jumbo maximum frame size (e.g., 9198 bytes) by default on all data center switches causes any downsides. The core issue is hardware... canonical: https://daily.dev/posts/the-impact-of-jumbo-maximum-frame-size-on-data-center-switches-ipspace-net-blog-tuylmlfkv twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: The Impact of Jumbo Maximum Frame Size on Data Center Switches « ipSpace.net blog | daily.dev og:description: Explores whether setting jumbo maximum frame size (e.g., 9198 bytes) by default on all data center switches causes any downsides. The core issue is hardware... og:url: https://daily.dev/posts/the-impact-of-jumbo-maximum-frame-size-on-data-center-switches-ipspace-net-blog-tuylmlfkv og:image: https://api.daily.dev/og/posts/TuyLmLFKV.png og:image:alt: The Impact of Jumbo Maximum Frame Size on Data Center Switches « 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. # The Impact of Jumbo Maximum Frame Size on Data Center Switches « ipSpace.net blog **[ipSpace.net Blog](https://daily.dev/sources/ipspace)** · 4 min read · 0 upvotes · 0 comments ## Summary Explores whether setting jumbo maximum frame size (e.g., 9198 bytes) by default on all data center switches causes any downsides. The core issue is hardware buffer architecture: fixed-size buffer systems lose burst-absorption capacity when max frame size increases (wasting large buffers on small packets), while particle/scatter-gather systems are unaffected. Cisco 7200/7500 used particle-based buffering; modern data center ASICs like Broadcom Trident/Tomahawk are opaque, though Arista and Cumulus Linux default to large frame sizes suggesting it may be a solved problem. The post also clarifies the distinction between MTU (Layer 3) and maximum frame size (Layer 2 Ethernet), and comments discuss real-world issues like OSPF adjacency failures due to MTU mismatches across vendors. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is the downside of setting jumbo MTU on every data center switch by default? The main risk depends on the switch's buffer architecture. Fixed-size buffer systems allocate one full buffer slot per packet regardless of size, so enabling jumbo frames reduces the total number of available buffers and shrinks burst-absorption capacity — a 64-byte VoIP packet wastes a 9K buffer slot. Particle-based (scatter/gather) systems avoid this problem entirely, as packets span as many small buffer units as needed. _Network engineers weighing jumbo frame rollouts track vendor-specific buffer behavior on daily.dev._ ### Do Arista and Cumulus Linux switches support jumbo frames by default? Cumulus Linux defaults to jumbo-capable frame sizes, and Arista's default maximum frame size ranges from 9214 to 10178 bytes depending on the platform. Most other switching vendors default to 1514 bytes, likely due to hardware buffer architecture concerns or legacy convention. _Engineers standardizing switch configs across vendors find relevant comparisons on daily.dev._ ## Similar posts on daily.dev - [Performance Has Layers](https://daily.dev/posts/performance-has-layers-ega2gcrnh) · Oxide · 97 upvotes · 2 comments - [The OSPF MTU Mismatch Saga « ipSpace.net blog](https://daily.dev/posts/the-ospf-mtu-mismatch-saga-ipspace-net-blog-jmtvuzjm6) · ipSpace.net Blog · 0 upvotes · 0 comments - [Debugging my new network, when 10 Gigabit Ethernet Runs at 300 Megabits](https://daily.dev/posts/debugging-my-new-network-when-10-gigabit-ethernet-runs-at-300-megabits-intohpmzt) · Scott Hanselman · 3 upvotes · 2 comments - [Mixing managed and unmanaged switches broke my network in ways I never expected](https://daily.dev/posts/mixing-managed-and-unmanaged-switches-broke-my-network-in-ways-i-never-expected-ciyujm06s) · XDA Developers · 0 upvotes · 0 comments --- [View this post on daily.dev](https://daily.dev/posts/the-impact-of-jumbo-maximum-frame-size-on-data-center-switches-ipspace-net-blog-tuylmlfkv) ```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":"The Impact of Jumbo Maximum Frame Size on Data Center Switches « ipSpace.net blog","url":"https://daily.dev/posts/the-impact-of-jumbo-maximum-frame-size-on-data-center-switches-ipspace-net-blog-tuylmlfkv","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/the-impact-of-jumbo-maximum-frame-size-on-data-center-switches-ipspace-net-blog-tuylmlfkv"},"datePublished":"2026-08-11T08:52:07.784Z","dateModified":"2026-08-11T09:02:54.573Z","description":"Explores whether setting jumbo maximum frame size (e.g., 9198 bytes) by default on all data center switches causes any downsides. The core issue is hardware...","image":"https://media.daily.dev/image/upload/s--0_ODbtD2--/f_auto/v1722860399/public/Placeholder%2008","thumbnailUrl":"https://media.daily.dev/image/upload/s--0_ODbtD2--/f_auto/v1722860399/public/Placeholder%2008","isAccessibleForFree":true,"articleSection":"ipSpace.net Blog","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"ipSpace.net Blog","logo":"https://media.daily.dev/image/upload/s--xS7E82MT--/f_auto,q_auto/v1786438303/logos/ipspace?_a=BAMAMicg0","url":"https://daily.dev/sources/ipspace"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/the-impact-of-jumbo-maximum-frame-size-on-data-center-switches-ipspace-net-blog-tuylmlfkv","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"ipSpace.net Blog","item":"https://daily.dev/sources/ipspace"},{"@type":"ListItem","position":3,"name":"The Impact of Jumbo Maximum Frame Size on Data Center Switches « ipSpace.net blog"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/the-impact-of-jumbo-maximum-frame-size-on-data-center-switches-ipspace-net-blog-tuylmlfkv#faq","mainEntity":[{"@type":"Question","name":"What is the downside of setting jumbo MTU on every data center switch by default?","acceptedAnswer":{"@type":"Answer","text":"The main risk depends on the switch's buffer architecture. Fixed-size buffer systems allocate one full buffer slot per packet regardless of size, so enabling jumbo frames reduces the total number of available buffers and shrinks burst-absorption capacity — a 64-byte VoIP packet wastes a 9K buffer slot. Particle-based (scatter/gather) systems avoid this problem entirely, as packets span as many small buffer units as needed. Network engineers weighing jumbo frame rollouts track vendor-specific buffer behavior on daily.dev."}},{"@type":"Question","name":"Do Arista and Cumulus Linux switches support jumbo frames by default?","acceptedAnswer":{"@type":"Answer","text":"Cumulus Linux defaults to jumbo-capable frame sizes, and Arista's default maximum frame size ranges from 9214 to 10178 bytes depending on the platform. Most other switching vendors default to 1514 bytes, likely due to hardware buffer architecture concerns or legacy convention. Engineers standardizing switch configs across vendors find relevant comparisons on daily.dev."}}]} ```