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Cisco 1841 mtu size on FastEthernet

Leifkaare
Level 1
Level 1

‎07-02-2008 04:39 AM - edited ‎03-03-2019 10:34 PM

Hello

Im using a Cisco 1841 where FastEthernet0/0 is the customers LAN, and FastEhternet0/1 is the WAN uplink.

When im trying to set the wan uplink to mtu size 1524 i get the following error: % Interface FastEthernet0/1 does not support user settable mtu.

Is there any way i can get the FastEhternet interface to support higher mtu size than the deafult 1500 ?

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4 Replies 4

a.alekseev
Level 7
Level 7

‎07-02-2008 04:43 AM

there is no way.

why do you want to increase mtu?

0 Helpful

Leifkaare
Level 1
Level 1
In response to a.alekseev

‎07-02-2008 04:53 AM

The customer needs higher mtu size to allow for logon to some of their server systems

0 Helpful

a.alekseev
Level 7
Level 7
In response to Leifkaare

‎07-02-2008 05:03 AM

something is wrong...

1500 is enough...

0 Helpful

paolo bevilacqua
Hall of Fame
Hall of Fame
In response to Leifkaare

‎07-02-2008 02:17 PM

Hi,

Alekseev is correct. Your customer has probably a misunderstanding bout the MTU concept in IP networking.

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