Re: MPLS Push action

[Kishore Padmanabha <kishore.padmanabha@broadcom.com>]

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Hi Thomas,

On Mon, Mar 3, 2025 at 2:25 PM Thomas Monjalon <thomas@monjalon.net> wrote:

> Hi,
>
> This is the related code:
>
> /**
>  * RTE_FLOW_ACTION_TYPE_OF_PUSH_MPLS
>  *
>  * Implements OFPAT_PUSH_MPLS ("push a new MPLS tag") as defined by the
>  * OpenFlow Switch Specification.
>  */
> struct rte_flow_action_of_push_mpls {
>     rte_be16_t ethertype; /**< EtherType. */
> };
>

 That is correct, it is related to the MPLS push action.

>
>

> > On Mon, Mar 3, 2025 at 8:02 AM Kishore Padmanabha
> > <kishore.padmanabha@broadcom.com> wrote:
> > >
> > > Hi,
> > >
> > > Anyone has any inputs on this. Or should I add new CLI commands in
> testpmd to support action for push MPLS tag.
>
> This action was designed as an OpenFlow implementation.
> Is what you require an OpenFlow spec?
> If yes, we may consider an update,
> if no, we should create a new action.
>
>  The openflow spec
https://opennetworking.org/wp-content/uploads/2014/10/openflow-switch-v1.5.1.pdf
has mention of the MPLS push action but it does not mention how to specify
how to configure the mpls label, TC and BOS.

> > >
> > > Thanks,
> > >
> > > Kishore
> > >
> > > From: Kishore Padmanabha <kishore.padmanabha@broadcom.com>
> > > Sent: Thursday, February 27, 2025 6:35 PM
> > > To: 'dev@dpdk.org' <dev@dpdk.org>
> > > Subject: MPLS Push action
> > >
> > > Hi,
> > >
> > > When MPLS push action is used, using testpmd action  of_push_mpls, it
> accepts the ethertype only. How do I specify the MPLS label and other
> fields for the MPLS header to be added ? In the doc, in section 7.2.3.7
> there is mention of OFXPMT_OFB_MPLS_LABEL and other MPLS fields, but I
> could not find that in dpdk implementation.
>
> What is this documentation?
> Please provide a link.
>
> The above label is only mentioned for match and it is documented in
https://opennetworking.org/wp-content/uploads/2014/10/openflow-switch-v1.5.1.pdf
section 7.2.3.7

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