Thanks Andrija, well done, I have indeed read your document. Using MTU 9000 solved my problem. :)
Lucian -- Sent from the Delta quadrant using Borg technology! Nux! www.nux.ro ----- Original Message ----- > From: "Andrija Panic" <andrija.pa...@gmail.com> > To: "dev" <dev@cloudstack.apache.org> > Cc: "users" <us...@cloudstack.apache.org> > Sent: Thursday, 21 December, 2017 14:09:43 > Subject: Re: Circumventing VXLAN MTU issues > 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
