Support of Jumbo frames by NIC
Hi All,
Is there is any command in Linux which will let me know whether my NIC supports Jumbo frame or not ? |
If you try to set the MTU larger than the supported value by the driver or hardware, it will be rejected:
Code:
# ifconfig eth0 mtu 9000 |
Jumbo Frames
I tried the command and got the following output.
$ ifconfig eth0 mtu 9000 SIOCSIFMTU: Operation not permitted So , Jumbo frames are not supported by my NIC. But if I set the MTU size untill 7200 , sudo ifconfig eth0 mtu 7200 it is accepting . But from 7210 , it is not accepting. $sudo ifconfig eth0 mtu 7210 SIOCSIFMTU: Invalid argument As far as I know , the MTU for Ethernet NICs possible is 1500. On what basis it is supporting untill 7000 . Please let me know. The driver information for my NIC is as follows. $ sudo ethtool -i eth0 driver: r8169 version: 2.2LK-NAPI firmware-version: bus-info: 0000:01:02.0 |
Any value over 1500 is a jumbo frame. Your NIC supports up to 7200 octet jumbo frames.
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