Cisco 1841 mtu size on FastEthernet

[Leifkaare]

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 ?

[a.alekseev]

there is no way.

why do you want to increase mtu?

[Leifkaare]

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

[a.alekseev]

something is wrong...

1500 is enough...

[paolo bevilacqua]

Hi,

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