Cisco Interface Does Not Support User Settable Mtu

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How to change interface mtu on a Fa port - 70875 - Cisco

    https://learningnetwork.cisco.com/thread/70875
    May 20, 2014 · R1(config-if)#mtu 1300 % Interface FastEthernet0/0 does not support user settable mtu. R1(config-if)# Whereas the same as been accepted in PT. Router5(config-if)#mtu 1300. Router5(config-if)#do show int fa 0/0. FastEthernet0/0 is up, line protocol is up (connected) Hardware is Lance, address is 000c.85c9.1801 (bia 000c.85c9.1801)

% Interface FastEthernet0/0 does not su... - Cisco Community

    https://community.cisco.com/t5/switching/interface-fastethernet0-0-does-not-support-user-settable-mtu/td-p/1628063
    router.rjo(config-if)#mtu 1520 % Interface FastEthernet0/0 does not support user settable mtu.

mtu on cisco routers Evil TTL - Network Solutions

    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} .

No able to set MTU for jumbo frames - Cisco Community

    https://community.cisco.com/t5/switching/no-able-to-set-mtu-for-jumbo-frames/td-p/1321012
    (config-if)#mtu 9189 % Interface GigabitEthernet2/29 does not support user settable mtu.

Solved: MTU problems with MPLS - Cisco Community

    https://community.cisco.com/t5/mpls/mtu-problems-with-mpls/td-p/322361
    It talks about this problem in MPLS and VPN Arch Vol II, and specifies that procedure and says that this indicates a failure of either a LSP or a switch that doesn't support baby giants. As my switch does support them appropriately, I am thinking it is the PA at fault, but I can find no documentation about what MTU it supports and whether MPLS works through it.

Changing MTU size - Cisco Community

    https://community.cisco.com/t5/other-network-architecture/changing-mtu-size/td-p/113557
    % Interface Vlanxx does not support user settable mtu. I am having no luck in changing the MTU size with above commands. Can anyone help or shed some more light on chainging the regular MTU size.

How To change MTU on LAN interface - Cisco Community

    https://community.cisco.com/t5/other-network-architecture/how-to-change-mtu-on-lan-interface/td-p/498325
    Cisco 3745 router - I need to change LAN interface from 1500 to 4470 to match WAN interafce mtu. Is this possible? % Interface FastEthernet0/0 does not support user settable mtu.

Solved: MTU size on tunnel interface - Cisco Community

    https://community.cisco.com/t5/routing/mtu-size-on-tunnel-interface/td-p/857347
    % Interface Tunnel41 does not support adjustable maximum datagram size To find the 'ip mtu' value, the command is show ip interface tunnel 41 Tunnel41 is up, line protocol is up

Cisco Bug: CSCtb78261 - WS-C4900M: not set MTU on ...

    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.



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