Hi Ole,Thanks for the quick response. I am setting MTU to 1500 and trying to test larger packets. (by enabling reassembly feature on interfaces)It seems to work fine on regular interfaces. and On tunnel interfaces packets are getting struck in reassembly saying inconsistent UDP/IP lengths.So thought of checking with the community. Thanks,Sam On Wednesday, March 13, 2019, 1:39:06 AM PDT, Ole Troan <otr...@employees.org> wrote: > I am new to VPP and experimenting with it. > I was able to get Reass/Frag working on regular Interfaces. > > The question i have is does Reassembly and Fragmentation supported on Tunnel > interfaces(Both VXLAN/IPSec). > If supported, is there any config knob i need to enable in addition to > enabling feature on those interfaces. > > I am running V18.10. Any inputs will be of great help.
Firstly if you need fragmentation and reassembly you are probably doing something wrong. ;-) Fragmentation is done both for IPv4 and IPv6 in the rewrite node. For IPv6 it is only done for locally originated. packets. Somewhat depending on inner tunnel MTU and outer interface MTU, you can end up with inner or outer fragmentation in the tunnel. Full reassembly is enabled by default only for forus packets (destined to one of VPP’s addresses). It can be enabled in-path as well, but that’s probably not a good idea. Virtual reassembly is integrated into NAT, MAP, and I’m working on generalising that. None of these are tunnel type specific. (Although some tunnels act as input features, or have their own FIB DPO, bypassing the “forus” check). Cheers, Ole-=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#12502): https://lists.fd.io/g/vpp-dev/message/12502 Mute This Topic: https://lists.fd.io/mt/30410981/1743273 Mute #vnet: https://lists.fd.io/mk?hashtag=vnet&subid=3816821 Group Owner: vpp-dev+ow...@lists.fd.io Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub [caffeine.co...@yahoo.com] -=-=-=-=-=-=-=-=-=-=-=-
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