Mikrotik has the option for L2MTU and MTU on the interfaces, what setting do you use for L2MTU? The Ubiquiti link I've got running is Nanobridges, which evidently only do 1524. I'm having trouble finding the setting on the Ceragons.
On Thursday, April 6, 2017, Erich Kaiser <[email protected]> wrote: > On WISP side we standardize interface on 1548 MTU and MPLS interface > setting to 1530 MTU. Ubiquiti gear if not using older model (with USB > port) you can go up to 2024 via newer firmware. > > > > > Erich Kaiser > North Central Tower > [email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');> > Office: 630-621-4804 > Cell: 630-777-9291 > > > On Wed, Apr 5, 2017 at 10:00 PM, Jason McKemie < > [email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: > >> So just max out the wireless equipment between the routers, but make sure >> either end is less than the radios? As far as I can tell from looking >> around in forums, Ubiquiti will do 2024. I'm not sure what a Ceragon >> IP-20C will do, or where this setting is located in the interface. >> >> On Wed, Apr 5, 2017 at 2:54 PM, Cassidy B. Larson <[email protected] >> <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: >> >>> I always suggest you max out all your MTUs. MTU sizes have to match on >>> both sides of a MPLS tunnel as well. >>> It’s always nice to have equal or greater MTU available in between those >>> two end points. 9200+ bytes or bust! :) >>> >>> >>> On Apr 5, 2017, at 1:36 PM, Jason McKemie <j.mckemie@veloxinetbroadband. >>> com <javascript:_e(%7B%7D,'cvml','[email protected]');>> >>> wrote: >>> >>> Thanks. >>> >>> So I want to set my Layer2 MTU on the Mikrotik Interface to something >>> greater than 1530, then the MTU on the interface to something greater than >>> 1530, but less than I have the Layer2 MTU set to? Then just set the MPLS >>> MTU to 1530? Is there any rule of thumb for the gap between all of these? >>> >>> On Wed, Apr 5, 2017 at 2:13 PM, Sterling Jacobson <[email protected] >>> <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: >>> >>>> My MTU on all MPLS stuff is set for over 9000 so I can do jumbo. >>>> >>>> >>>> >>>> If you don’t want fragmentation or problems, your native MTU on layer2 >>>> needs to be larger probably. >>>> >>>> Then the next layer up a bit smaller, and so on so that you can again >>>> pass layer2 over the MPLS network at 1530. >>>> >>>> >>>> >>>> >>>> >>>> *From:* Af [mailto:[email protected] >>>> <javascript:_e(%7B%7D,'cvml','[email protected]');>] *On Behalf Of >>>> *Jason >>>> McKemie >>>> *Sent:* Wednesday, April 5, 2017 12:46 PM >>>> *To:* [email protected] <javascript:_e(%7B%7D,'cvml','[email protected]');> >>>> *Subject:* [AFMUG] MPLS/VPLS MTU >>>> >>>> >>>> >>>> What is the best way to test a link to make sure you're not going to >>>> have issues running MPLS over it? Can the packets be fragmented, or will >>>> that cause issues? I'm able to ping the other end of a couple of links >>>> with 1530 byte packets, but when I disallow fragmentation, things stop >>>> working. >>>> >>>> >>>> >>>> -Jason >>>> >>> >>> >>> >> >
