Hi, > But dpdk by vpp booting, using `--in-memory -a pci xxx`, will find tx is > scatter and not vector.
You probably need to add no-multi-seg in your dpdk startup.conf section: https://s3-docs.fd.io/vpp/26.06/configuration/reference.html#no-multi-seg DPDK vector rx/tx flavors usually cannot support chained buffers so you have to explicitly disable them. This is usually fine if you do not expect jumbo frames. Best ben
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