Re: [Users] Configuring MTU
----- Original Message -----
On Fri, 30 Mar 2012, Ayal Baron wrote:
> Have you encountered any issues with it? although the bond supports
> 9000, sending a 1500 packet from the guest should work just fine.
Right, the issue I am having is larger then 1500 packet being sent to
the
guest.
> The only way I can think of to control this per guest would be to
> configure the tap device of the vNIC, however, all devices
> connected to a bridge have to have the same mtu so changing one
> tap device would require changing them all which would beat the
> purpose.
> So I'm not sure what you're actually asking for here.
Today what I do is this. Fire up the VM, find out what host its on,
figure
out the vnet interface and then ifconfig it with smaller MTU if it is
say
vnet1 I would:
ifconfig vnet1 mtu 1500
This seams to be working, other hosts that have vnet interfaces at
9000
bytes still work and nothing larger then 1500 bytes is sent to the
vnet I
lower to 1500. I now just need a way to keep from doing this every
time
manually.
So if I have 3 VMs that require 1500 and I have 3 hosts and they just happen to be
scheduled one per host, my other 100 VMs that do support 9000 would be degraded.
Instead, separate these 3 VMs to a different vnet and everything just works.
When you change the vnet you're degrading all the VMs running on this host using this
network.
-Nathan