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igable/gist:7344884

Created November 6, 2013 22:01
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Error message when trying to being up a tagged MTU 9000 (i.e. Jumbo Frame) on Intel X520 10GE card.
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gistfile1.txt
[root@ps-bandwidth ~]# ifup eth1.1601
Added VLAN with VID == 1601 to IF -:eth1:-
SIOCSIFMTU: Numerical result out of range
@igable
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igable commented Nov 6, 2013

What solved this for me was bringing up the untagged interface once with a MTU of 9000 taking it down, and then bringing up the tagged interface.

[root@ps-bandwidth ~]#ifup eth1
[root@ps-bandwidth ~]#ifdown eth1
[root@ps-bandwidth ~]#ifup eth1.1600

@wgroenewold
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When you change the mtu of a VLAN be sure the network device has an MTU higher than the VLAN or you also get "Numerical result out of range"

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