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doc: clarify MAC/VLAN filtering in virtio guide

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Explicitly document that the MAC/VLAN filtering in virtio
is best effort to help users understand why unwanted packets
could still arrive.

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Tiwei Bie 2019-09-18 13:00:50 +08:00 committed by Ferruh Yigit
parent 1ae55ad38e
commit a2d5c98450
1 changed files with 1 additions and 1 deletions
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doc/guides/nics/virtio.rst
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@ -56,7 +56,7 @@ In this release, the virtio PMD driver provides the basic functionality of packe
* Features of mac/vlan filter are supported, negotiation with vhost/backend are needed to support them.
When backend can't support vlan filter, virtio app on guest should not enable vlan filter in order
to make sure the virtio port is configured correctly. E.g. do not specify '--enable-hw-vlan' in testpmd
command line.
command line. Note that, mac/vlan filter is best effort: unwanted packets could still arrive.
* "RTE_PKTMBUF_HEADROOM" should be defined
no less than "sizeof(struct virtio_net_hdr_mrg_rxbuf)", which is 12 bytes when mergeable or