cloudstack-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Andrija Panic <andrija.pa...@gmail.com>
Subject Re: Circumventing VXLAN MTU issues
Date Thu, 21 Dec 2017 14:09:43 GMT
Hi Nux,

there is one rare contributions from my side :D to the ACS (documentation,
2.5 years ago) - check it here:
http://docs.cloudstack.apache.org/en/latest/networking/vxlan.html#important-note-on-mtu-size

We are using it extensively, feel free to ask anything if needed.

Cheers

On 20 November 2017 at 19:38, Nux! <nux@li.nux.ro> wrote:

> Yeah, I changed the MTU to 9000 on the Guest network interface and
> connectivity is now fine out of the box.
> Hopefully I won't need to set jumbo frames in the VMs any time soon. :-)
>
> Thanks for the tips.
>
> Lucian
>
> --
> Sent from the Delta quadrant using Borg technology!
>
> Nux!
> www.nux.ro
>
> ----- Original Message -----
> > From: "Simon Weller" <sweller@ena.com.INVALID>
> > To: "users" <users@cloudstack.apache.org>
> > Cc: "dev" <dev@cloudstack.apache.org>
> > Sent: Monday, 20 November, 2017 17:36:31
> > Subject: Re: Circumventing VXLAN MTU issues
>
> > Change your host interface MTU to something a lot higher.
> >
> >
> > ________________________________
> > From: Nux! <nux@li.nux.ro>
> > Sent: Monday, November 20, 2017 10:51 AM
> > To: users
> > Cc: dev
> > Subject: Re: Circumventing VXLAN MTU issues
> >
> > Hi,
> >
> > I probably can use jumbo frames, but for now my lab is restricted to a
> single
> > machine.
> > Anything I can do in this situation?
> >
> > --
> > Sent from the Delta quadrant using Borg technology!
> >
> > Nux!
> > www.nux.ro
> >
> > ----- Original Message -----
> >> From: "Simon Weller" <sweller@ena.com.INVALID>
> >> To: "dev" <dev@cloudstack.apache.org>, "users" <
> users@cloudstack.apache.org>
> >> Sent: Monday, 20 November, 2017 16:38:33
> >> Subject: Re: Circumventing VXLAN MTU issues
> >
> >> Lucian,
> >>
> >> Can you run jumbos on your switches?
> >>
> >> - Si
> >>
> >>
> >> ________________________________
> >> From: Nux! <nux@li.nux.ro>
> >> Sent: Monday, November 20, 2017 10:08 AM
> >> To: dev
> >> Cc: users
> >> Subject: Circumventing VXLAN MTU issues
> >>
> >> Hello,
> >>
> >> I am playing around with the native VXLAN implementation and I have of
> course
> >> hit the situation where MTU on the host gets chomped by 50 bytes and
> traffic
> >> crawls to a stop in the VMs.
> >> How are you people circumventing this? The easiest, but kind of
> inconvenient for
> >> customers would be to set MTU 1450 inside the VM, though it could be
> baked into
> >> the templates or via cloud-init.
> >>
> >> Is the OpenVSwitch implementation (of VXLAN) suffer from the same
> problem, I
> >> understand ovs can dynamically adjust MTUs to compensate (?), but at
> the same
> >> time this VXLAN implementation suffers from some limitations (multicast
> etc).
> >>
> >> Lucian
> >>
> >>
> >> --
> >> Sent from the Delta quadrant using Borg technology!
> >>
> >> Nux!
> > > www.nux.ro
>



-- 

Andrija Panić

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message