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--- cisco:certification_topics:ccie-ei:1.1.aiii [2025/11/24 00:26] – created Name
+++ cisco:certification_topics:ccie-ei:1.1.aiii [2025/11/24 00:42] (current) – Name
@@ Line 1: / Line 1: @@
 ======L2 MTU======
 =====General=====
+  * MTU, or Maximum Transmission Unit, is the largest possible Ethernet frame a device can forward
+=====IEEE 802.3 standard=====
+    * Min Ethernet frame size = 64 bytes (B).
+    * Max Ethernet frame size = 1518 B.
+      * Updated to 1522 B for VLAN tagging.
+    * Jumbo frames
+      * Payload greater than 1500 B.
+      * For use on local networks.
+      * Can be as large as 9000 B.
+      * Ports have to be at least 1 Gb/s.
+    * Baby Jumbo frames
+      * Slightly larger than 1500 B payload.
+    * Super Jumbo frames
+      * Payload greater than 9000 B.
+=====MTU Configuration=====
+  * Configure on a Cisco WS-3750X-48P.
+    * <code>core-switch(config)#system mtu ?
+  <1500-1998>  MTU size in bytes
+  jumbo        Set Jumbo MTU value for GigabitEthernet or TenGigabitEthernet interfaces
+  routing      Set the Routing MTU for the system</code>
+  * Configure on a Cisco 9300-24UX.
+    * <code>sw-27(config)#system mtu ?
+  <1500-9198>  MTU size in bytes</code>
 ======Backlinks======
 [[cisco:certification_topics:ccie-ei|CCIE-EI v1.1]]\\

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