On Thu, Oct 4, 2018 at 3:52 AM Jesper Dangaard Brouer <brouer@xxxxxxxxxx> wrote: > Can Alex or Rob explain: > > (1) What is your use-case for wanting jumbo-frames? > > And (2) will an MTU of ~3000Bytes be sufficient? (which XDP does support) Not Alex or Rob, but lack of jumbo frames is currently a blocker for using XDP. I'm working on https://github.com/JustinAzoff/libflowbypass which is similar to the bypass stuff suricata can do, but implemented as a standalone library. We have a number of high performance networks that use jumbo frames and the XDP NICs sit on fiber taps. So it's not so much that I want to use jumbo frames but that some of the traffic I need to analyze is using them. For this same reason 3000 bytes isn't enough since I see 9000 byte frames. If XDP could implicitly XDP_PASS jumbo frames instead of truncating them at 3000 that would at least allow the use of XDP to inspect and drop the majority of < 3000 byte frames. -- - Justin
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