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https://community.cisco.com/t5/switching/interface-fastethernet0-0-does-not-support-user-settable-mtu/td-p/1628063
% Interface FastEthernet0/0 does not support user settable mtu As Alain already asked you about the IP MTU command, have to tried to issue on router? Please could you let us know what eaxctly your need to we can suggest you any other option (Any issue with any routing protocol or something.
https://evilttl.com/wiki/mtu-on-cisco-routers
% Interface FastEthernet0 / 0 does not support user settable mtu. The same refers to switch interface cards. To check L3 MTU on an interface issue sh ip int {if-number}. To check L2 MTU issue sh int {if-number} command. Logically speaking, L3 MTU setting can’t be greater than L2 MTU setting. These numbers don’t take headers and trailers ...
https://quickview.cloudapps.cisco.com/quickview/bug/CSCuz58508
Nov 27, 2019 · Symptom: Configuring MTU size for interfaces results in a message to console: % Interface GigabitEthernet1 does not support user settable MTU. Conditions: CSR1000v running Denali-16.3.1 and attempting to configure interface MTU size for interfaces that rely on polled mode drivers. Determining if an interface uses a polled mode driver is done by using the following show …
https://quickview.cloudapps.cisco.com/quickview/bug/CSCtb78261
Jan 24, 2017 · Symptom: It is problem that the customer does not set MTU on management port. The MTU cannot set the numerical value of 1500 or more. ----- Cat4900M#conf t Enter configuration commands, one per line. End with CNTL/Z. Cat4900M(config)#int fa1 Cat4900M(config-if)#mtu ? <64-9198> MTU size in bytes Cat4900M(config-if)#mtu 1518 % Interface FastEthernet1 does not support user settable mtu.
https://learningnetwork.cisco.com/thread/70875
May 20, 2014 · And even if i'm trying to give the mtu value less than 1500, it is not accepting. R2(config-if)#mtu 1000 % Interface FastEthernet0/0 does not support user settable mtu. And i tried to setup ip mtu 1000, but i didn't see it changed here: I think i should know the diff. R2(config-if)#ip mtu 1000. R2(config-if)#do show int fa 0/0
https://www.experts-exchange.com/questions/27047799/How-can-I-change-MTU-on-FastEthernet-port-Cisco-7206.html
How can I change MTU on FastEthernet port (Cisco 7206) When I enter following commands #interface fastEthernet 0/0 #mtu 1524 I see next message % Interface FastEthernet0/0 does not support user settable mtu.
https://networklessons.com/cisco/ccie-routing-switching/pppoe-mtu-troubleshooting-cisco-ios
Maximum Transmission Unit (MTU) is the largest size in bytes that a certain layer can forward. The MTU is different for each protocol and medium that we use. Ethernet for example has a MTU of 1500 bytes by default. This means that a single Ethernet frame can carry up to 1500 bytes of data. On top of this data we add the Ethernet header.
https://ieoc.com/discussion/6244/mtu-change
I need to change the mtu size on a router interface and I have some problems. So I have 2 questions: First one:-----Does anyone know why I can't change the mtu interface with this command ? Router(config-if)#mtu 9216 % Interface FastEthernet0/0 does not support user settable mtu. Router(config-if)# Second one:-----what is the difference between ...
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_l2_vpns/configuration/15-s/mp-l2-vpns-15-s-book/mp-mtu-cmd-changes.html
Jan 25, 2018 · The range of values is from 1500 to 1530. Before this enhancement, the MTU of those interfaces was not configurable, and any attempt to configure the interface MTU displayed the following message: % Interface {Interface Name} does not support user settable mtu.
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