MTU

MTU

MTU/Maximum Transfer Unit

MTU is the maximum size of data that can be sent on a network at one time. The MTU value differs for each physical medium.

Examples

• MTU of Ethernet ---> 1500 bytes
• MTU of Optical Fiber (FDDI) ---> 4352 bytes

In the AG10/AR10 series, the MTU value of each interface can be checked from amsh.

amnimo$ show interface 
eth0: state UP mtu 1500
  mac e8:1b:4b:00:30:01
  ipv4 192.168.0.254/24
  ipv6 fe80::ea1b:4bff:fe00:3001/64
lan0: state UP mtu 1500
  mac e8:1b:4b:00:31:01
lan1: state DOWN mtu 1500
  mac e8:1b:4b:00:31:01
lan2: state DOWN mtu 1500
  mac e8:1b:4b:00:31:01
lan3: state DOWN mtu 1500
  mac e8:1b:4b:00:31:01
br0: state UP mtu 1500
  mac e8:1b:4b:00:31:01
  ipv4 192.168.1.254/24
  ipv4 172.16.0.1/16
  ipv6 fe80::ea1b:4bff:fe00:3101/64