Modifying Mtu Size in Solaris 11 and getting : cannot set link property 'mtu' on 'net1': link busy (Doc ID 1623256.1)

Last updated on APRIL 18, 2023

Applies to:

Solaris Operating System - Version 11.1 and later
Information in this document applies to any platform.

Need to increase the MTU size of an interface using dladm, in this case net1, but it fails with "link busy".

Example

# dladm set-linkprop -p mtu=9000 net1
dladm: warning: cannot set link property 'mtu' on 'net1': link busy

If we down the interface first and try again, it still fails with "link busy".

Example

# ifconfig net1 down

# dladm set-linkprop -p mtu=9000 net1
dladm: warning: cannot set link property 'mtu' on 'net1': link busy

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