# mtu Published articles for mtu. This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## Introducing the J2sw MTU and Encapsulation Calculator DevFeed: [Introducing the J2sw MTU and Encapsulation Calculator]() Original publisher: [Read original article]() Author: j2sw Published: 2026-07-28T16:37:53Z Content type: tutorial Language: en Sources: [Justin Wilson (j2sw)]() Topics: [Network](), [Tool](), [Ethernet](), [VXLAN]() Tags: [calculator](), [cisco](), [ethernet](), [fragmentation](), [gre](), [headers](), [ipsec](), [ipv4](), [ipv6](), [juniper](), [mikrotik](), [mpls](), [mtu](), [network-engineering-resources](), [network-tools](), [network-troubleshooting](), [overhead](), [payload](), [pppoe](), [vlan](), [vxlan]() ### AI overview The article introduces the J2SW MTU and Encapsulation Calculator, which estimates inner IP MTU and required underlay MTU for combinations of PPPoE, GRE, VLAN, MPLS, VXLAN, and other encapsulations. It explains how Layer 2 tags affect Ethernet frame size separately from IP MTU and describes overhead calculations, including cases where fragmentation can be avoided. ### Source excerpt Ever wondered what the effects of different combinations of PPPoE, GRE, and others have on the MTU of a packet? I am excited to announce the first of many J2 Network tools: the J2SW MTU and Encapsulation Calculator. You select the service MTU and the encapsulation used on the path. The calculator then works out ... Read more The post Introducing the J2sw MTU and Encapsulation Calculator appeared first on Justin Wilson (j2sw). ## What Is IPoE? DevFeed: [What Is IPoE?]() Original publisher: [Read original article]() Author: j2sw Published: 2026-07-24T12:15:00Z Content type: tutorial Language: en Sources: [Justin Wilson (j2sw)]() Topics: [DHCP](), [Ethernet](), [Networks](), [Protocol (disambiguation)](), [gateway]() Tags: [broadband](), [dhcp](), [dns](), [ethernet](), [ipoe](), [mtu](), [network-operations](), [pppoe](), [router](), [vlan]() ### AI overview This article explains IPoE, or IP over Ethernet, as an access model in which a customer router uses DHCP to obtain an IP address and network configuration directly, without establishing a PPPoE session or storing login credentials. It describes DHCP relay and Broadband Network Gateway processing and outlines subscriber-identification methods such as VLANs, access ports, DHCP Option 82, circuit identifiers, ONT details, and MAC authentication. ### Source excerpt 4 minutes read time.Many of us ISP veterans are familiar with Point-to-Point Protocol over Ethernet (PPPoE), also referred to as Triple P O E. PPPoE is showing its age. It showed its age 15 years ago. DHCP was the simple fix for modern networks. It had less overhead and was simple. Now along comes IPoE. ... Read more The post What Is IPoE? appeared first on Justin Wilson (j2sw). ## How 1500 bytes became the MTU of the internet DevFeed: [How 1500 bytes became the MTU of the internet]() Original publisher: [Read original article]() Author: ben@benjojo.co.uk Published: 2020-02-19T11:48:55Z Content type: article Language: en Sources: [benjojo blog]() Topics: [Ethernet](), [networking](), [Networks](), [protocols](), [Latency](), [Hardware]() Tags: [devices](), [ethernet](), [latency](), [mtu](), [network](), [protocols]() ### AI overview The article explains why 1500 bytes became the de facto MTU for Ethernet and the internet. It discusses packet fragmentation, larger MTUs such as WiFi and jumbo frames, early Ethernet hardware constraints, and the efficiency and latency tradeoffs of packet size on shared networks. ### Source excerpt How 1500 bytes became the MTU of the internet Translations