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! <n...@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" <swel...@ena.com.INVALID> > > To: "users" <us...@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! <n...@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" <swel...@ena.com.INVALID> > >> To: "dev" <dev@cloudstack.apache.org>, "users" < > us...@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! <n...@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
