Hi,
I've got a 2811 router with an HWIC-4ESW EtherSwitch card
Th IOS is c2800nm-advsecurityk9-mz.124-15.T7
I need 3 interfaces on that router so I configured one of the EtherSwitch interface as a switchport access on a vlan interface.
The interfaces configuration is as follow :
interface FastEthernet0/0
ip address 192.168.0.1 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat inside
ip virtual-reassembly
no ip route-cache cef
no ip route-cache
no ip mroute-cache
speed 100
duplex full
no shutdown
!
interface FastEthernet0/1
ip address 192.168.10.2 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat inside
ip virtual-reassembly
no ip route-cache cef
no ip route-cache
no ip mroute-cache
speed 100
duplex full
no shutdown
!
interface FastEthernet0/0/0
switchport access vlan 10
speed 100
duplex full
no shutdown
!
interface FastEthernet0/0/1
!
interface FastEthernet0/0/2
!
interface FastEthernet0/0/3
!
interface vlan 10
ip address 174.1.33.2 255.255.255.128
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
ip virtual-reassembly
no ip route-cache cef
no ip route-cache
no ip mroute-cache
no shutdown
My problem is that on the third interface (based on the vlan 10), I've got a cypher equipment that defines a maximum value of MTU to 1420
How can I configure the MTU value on the interface ?
Whatever the configuration I test ("mtu" command in interface mode, "ip mtu" command in interface mode, "mtu" comman in vlan database ...) I always got the same value of 1500 shown on all interfaces on the "sh interface" command
Thanks for your response
