[Linux] ifconfig mtu값 바꾸기

- ifconfig로 확인

root@ifconfig-test:~# ifconfig 
eth0      Link encap:Ethernet  HWaddr 6c:b3:11:3c:57:9c  
          inet addr:[ip]  Bcast:[Bcast_ip]  Mask:255.255.0.0
          inet6 addr: fe80::1e1b:dff:fec0:999a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:1159244 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:137858414239 (137.8 GB)  TX bytes:402705703570 (402.7 GB)

eth1      Link encap:Ethernet  HWaddr 1c:1b:0d:c0:99:9a  
          inet addr:[ip]  Bcast:[Bcast_ip]  Mask:255.255.0.0
          inet6 addr: fe80::1e1b:dff:fec0:999a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:5000  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:1159244 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

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- mtu값 변경

eth0 mtu값을 1500 > 5000으로 변경해보자

> ifconfig [dev] mtu [value]

root@ifconfig-test:~# ifconfig eth0 mtu 5000
root@ifconfig-test:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 6c:b3:11:3c:57:9c  
          inet addr:[ip]  Bcast:[Bcast_ip]  Mask:255.255.0.0
          inet6 addr: fe80::1e1b:dff:fec0:999a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:5000  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:1159244 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:137858414239 (137.8 GB)  TX bytes:402705703570 (402.7 GB)

eth1      Link encap:Ethernet  HWaddr 1c:1b:0d:c0:99:9a  
          inet addr:[ip]  Bcast:[Bcast_ip]  Mask:255.255.0.0
          inet6 addr: fe80::1e1b:dff:fec0:999a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:5000  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:1159244 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)