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doc: fix modify field action description for mlx5

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This patch adds mlx5 specifics description about
handling the Ethernet type by modify field action
for VLAN-ed traffic.

Fixes: 641dbe4fb0 ("net/mlx5: support modify field flow action")
Cc: stable@dpdk.org

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
This commit is contained in:
Viacheslav Ovsiienko 2022-02-24 18:01:36 +02:00 committed by Raslan Darawsheh
parent 0f845cc726
commit d98c04e82d
1 changed files with 6 additions and 0 deletions
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6
doc/guides/nics/mlx5.rst
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@ -410,6 +410,12 @@ Limitations
- Modification of the 802.1Q Tag, VXLAN Network or GENEVE Network ID's is not supported.
- Encapsulation levels are not supported, can modify outermost header fields only.
- Offsets must be 32-bits aligned, cannot skip past the boundary of a field.
- If the field type is ``RTE_FLOW_FIELD_MAC_TYPE``
and packet contains one or more VLAN headers,
the meaningful type field following the last VLAN header
is used as modify field operation argument.
The modify field action is not intended to modify VLAN headers type field,
dedicated VLAN push and pop actions should be used instead.
- IPv6 header item 'proto' field, indicating the next header protocol, should
not be set as extension header.