[ovs-discuss] mtu_request

[Chris Boley]

Disregard I figured this out:
OVS:
foo at VMHOST:~$ sudo ovs-vsctl show
126a4b57-4837-42a9-95d6-d818b35e95bd
   Bridge "vbridge0"
       Port "vnet0"
           tag: 2
           Interface "vnet0"
       Port "vbond0"
           Interface "eth2"
           Interface "eth1"
       Port "vbridge0"
           Interface "vbridge0"
               type: internal
   ovs_version: "2.5.2"
foo at VMHOST:~$ sudo ovs-vsctl list-ports vbridge0
vbond0
vnet0

foo at VMHOST:~$ sudo ovs-vsctl set interface vnet0 mtu=1520
foo at VMHOST:~$ sudo ovs-vsctl set interface eth1 mtu=1520
foo at VMHOST:~$ sudo ovs-vsctl set interface eth2 mtu=1520

foo at VMHOST:~$ sudo ovs-vsctl set interface eth2 mtu=1520
foo at VMHOST:~$
foo at VMHOST:~$
foo at VMHOST:~$
foo at VMHOST:~$ sudo ovs-vsctl list interface vbridge0
_~ truncated output
mtu                 : 1520   <<<==========================================

"The bridge MTU is automatically set to the smallest port MTU. So you just
have to set the MTU of each port of the bridge."

Albeit,I had set MTU on my external ports via my interfaces file, I still
have to force OVS to understand the same.

Sorry still learning.............




On Sat, Mar 3, 2018 at 8:32 AM, Chris Boley <ilgtech75 at gmail.com> wrote:

> OVS:
> foo at VMHOST:~$ sudo ovs-vsctl show
> 126a4b57-4837-42a9-95d6-d818b35e95bd
>    Bridge "vbridge0"
>        Port "vnet0"
>            tag: 2
>            Interface "vnet0"
>        Port "vbond0"
>            Interface "eth2"
>            Interface "eth1"
>        Port "vbridge0"
>            Interface "vbridge0"
>                type: internal
>    ovs_version: "2.5.2"
>
> I've tried changing MTU parameters on my internal vbridge0 interface:
>
> sudo ovs-vsctl set interface vbridge0 mtu=1520
>
> This command runs, but does nothing to the MTU of my internal bridge
> interface.
>
> There's supposed to be a separate command:
> ovs-vsctl set int vbridge0 mtu_request=1520
>
> <column name="mtu_request"
>               type='{"type": "integer", "minInteger": 1}'>
>         <p>
>           Requested MTU (Maximum Transmission Unit) for the interface. A
> client
>           can fill this column to change the MTU of an interface.
>         </p>
>
>
> I get this back when running the command:
> ovs-vsctl: Interface does not contain a column whose name matches
> "mtu_request"
>
> What am I doing wrong?
> All other interfaces in my bridge for example the eth1 and eth2 of my
> vbond0,
> and the vnet0 being created by libvirt is setting itself to 1520 by way of
> the guest's /etc/network/interfaces file and shows 1520 values when I run
> the
> * list interface vnet0 command.
>
> is the mtu_request= a deprecated option?
>
>
>
>
>
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