| Asset ID: |
1-71-1528904.1 |
| Update Date: | 2017-07-11 |
| Keywords: | |
Solution Type
Technical Instruction Sure
Solution
1528904.1
:
Changing the MTU of a vNIC
| Related Items |
- Oracle Fabric Interconnect F1-15
- Oracle Fabric Interconnect F1-4
|
| Related Categories |
- PLA-Support>Sun Systems>SAND>Network>SN-SND: Oracle Virtual Networking
|
In this Document
Applies to:
Oracle Fabric Interconnect F1-15 - Version All Versions and later
Oracle Fabric Interconnect F1-4 - Version All Versions and later
Information in this document applies to any platform.
Goal
Changing the MTU of a vNIC
Fix
The vNIC inherits the MTU from its termination port when it is newly added and cannot be changed afterwards, either on host or Fabric Director.
MTU is actually configured on a per ethernet-port basis, and can only be done when there are no vnics terminated on it.
To check how many vnics are terminated on ethernet-port.
admin@chassis# show ethernet-port <slot#/port#> vnics
The command to do this is as follows:
admin@chassis# set ethernet-port <slot#/port#> -mtu=<number>
The MTU of the I/O port must match the MTU of the neighboring switch port that it is connected to.
It is not required to remove the vNICs bound to the ethernet-port in order to change the MTU on ethernet-port. Instead, the vNIC may be unbound and then rebound across MTU updates on it ports. It can be achieved with the following commands.
admin@Chassis# set vnic vnic_name.serverprofile -if=none
Do this for all the vnics bound to that termination port.
Please consider the downtime when doing the above since it will result in link loss of the vNIC.
Set the MTU on the Ethernet-port as shown by the above command: As an example:
admin@Chassis# set ethernet-port 2/1 -mtu=9000
Now, bind all the vNIC's back to this ethernet-port.
admin@Chassis# set vnic vnic_name.serverprofile -if=<port#>
Note: - While setting the ethernet port mtu we should also set the mtu on switch.
Example: - If the switch port mtu is 1500 and the ethernet port mtu is 9000 then you won't be able to ping using jumbo frames. It is always advised to set the switch port mtu same as ethernet port mtu.
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