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  1. What is the actual size of an Ethernet MTU

    Apr 28, 2015 · The term maximum transmission unit (MTU) defines the maximum layer 3 packet that can be sent over a medium. Because the layer 3 packet rests inside the data portion of an Ethernet …

  2. Why the MTU size is 1500 ? - Cisco Community

    Nov 19, 2002 · Assuming the MTU payload to be 1500 the total number of bytes comes to 1500 + 8 + 6 + 6 + 2 + 4 = 1526 bytes. Now between each frame there is a inter frame gap of 12 bytes which …

  3. AnyConnect MTU - Cisco Community

    Oct 6, 2014 · The MTU value for VPN Client or SVC Client, used to connect to the VPN network, was set to 1300 bytes.With AnyConnect Client, the initial value is set to 1406 bytes. While it considers the …

  4. Understanding MTU, MSS, Frame / Packets / TCP and UDP - Cisco …

    Jun 3, 2015 · Hi all, I have read around extensively but i am still not able to grasp the actual relationship of the above. MTU 1st and foremost, the description of MTU in TCP/IP guide is -> The data link layer …

  5. MTU mismatch scenario, two hosts handle in a different way ingoing ...

    Aug 6, 2022 · MTU mismatch scenario, two hosts handle in a different way ingoing packets bigger than local interface MTU. How does MTU really work?

  6. Solved: reduce mtu size on vti interface - Cisco Community

    Apr 2, 2025 · Solved: hi out there is there some "simple" way of reducing the MTU size of a tunnel interface - a VTI ? We have a VTI which after the ipsec traverses trough a MPLS tunnel and we …

  7. MTU size on physical and logical port in OSPF

    Feb 17, 2025 · The MTU of the physical interface will always need to be larger than the MTU of any L3 logical sub-interfaces. That's because when sending an IP packet from a sub-interface the physical …

  8. Solved: Jumbo MTU confusion - Cisco Community

    Jun 30, 2021 · Hello all I'm currently very confused about the Jumbo MTU configuration on Nexus 9336C and 31108TCV running NX-OS 9.3(7). As with the old Nexus 5548, I've configured a network …

  9. MTU on Tunnel Interfaces - Cisco Community

    Oct 22, 2015 · Reading the following statement from an article I was reading - "In the cases where IPsec is being used, it is customary to set the MTU size on the tunnel interfaces to 1400 bytes and to set …

  10. GRE Tunnel MTU, Interface MTU, and Fragmentation

    Jul 24, 2018 · Another example. What if the GRE interface’s MTU was increased above 1476 while retaining an ethernet MTU of 1500? Let’s say the GRE IP MTU was increased to 1477 bytes. This …