Editing Ethernet (section)

===Jabber===
A node that is sending longer than the maximum transmission window for an Ethernet packet is considered to be ''jabbering''. Depending on the physical topology, jabber detection and remedy differ somewhat.
* An [[Medium Attachment Unit|MAU]] is required to detect and stop abnormally long transmission from the [[Data terminal equipment|DTE]] (longer than 20–150&nbsp;ms) in order to prevent permanent network disruption.<ref>IEEE 802.3 ''8.2 MAU functional specifications''</ref>
* On an electrically shared medium (10BASE5, 10BASE2, 1BASE5), jabber can only be detected by each end node, stopping reception. No further remedy is possible.<ref>IEEE 802.3 ''8.2.1.5 Jabber function requirements''</ref>
* A repeater/repeater hub uses a jabber timer that ends retransmission to the other ports when it expires. The timer runs for 25,000 to 50,000 bit times for 1&nbsp;Mbit/s,<ref>IEEE 802.3 ''12.4.3.2.3 Jabber function''</ref> 40,000 to 75,000 bit times for 10 and 100&nbsp;Mbit/s,<ref>IEEE 802.3 ''9.6.5 MAU Jabber Lockup Protection''</ref><ref>IEEE 802.3 ''27.3.2.1.4 Timers''</ref> and 80,000 to 150,000 bit times for 1&nbsp;Gbit/s.<ref>IEEE 802.3 ''41.2.2.1.4 Timers''</ref> Jabbering ports are partitioned off the network until a carrier is no longer detected.<ref>IEEE 802.3 ''27.3.1.7 Receive jabber functional requirements''</ref>
* End nodes utilizing a MAC layer will usually detect an oversized Ethernet frame and cease receiving. A bridge/switch will not forward the frame.<ref>IEEE 802.1 ''Table C-1—Largest frame base values''</ref>
* A non-uniform frame size configuration in the network using [[jumbo frame]]s may be detected as jabber by end nodes.{{citation needed|date=April 2020}} Jumbo frames are not part of the official [[IEEE 802.3]] Ethernet standard.
* A packet detected as jabber by an upstream repeater and subsequently cut off has an invalid [[frame check sequence]] and is dropped.<ref>{{Citation |title=802.3-2012 - IEEE Standard for Ethernet |date=2012-12-28 |url=https://ecfsapi.fcc.gov/file/1050839507018/IEEE%20Standard%20for%20Ethernet.pdf |access-date=2015-07-05 |publisher=[[IEEE Standards Association]] |section=3.1.1 Packet format}}</ref>