[dpdk-users] Adding multiple fields as key in ip_pipeline application

Nidhia Varghese nidhiavarghese93 at gmail.com
Tue May 2 11:28:48 CEST 2017


Can we do the append/prepend (of the port id with vlan id) through config


On Fri, Apr 28, 2017 at 7:24 PM, Singh, Jasvinder <jasvinder.singh at intel.com
> wrote:

> Hi Nidhia,
> I am developing an application in which I need to use both incoming port
> and vlan as the key for the flow table. Port field is available at 24th
> byte of mbuf and vlan(single tagged) will be at 268th byte (128 mbuf + 128
> headroom + 12 ethernet header).
> How can I represent this in my config file in the src_mask field?
> Is there any way to take these fields separately and keep in headroom and
> then use them to calculate hash for lookup?
> [Jasvinder] - If you look at edge_router_upstream.cfg,  pass-through
> pipeline have mask and offset defined for extracting the key from the
> packet header and storing in the headroom at the offset 128. This key is
> used in flow_classification pipeline to classify the flows. You can follow
> similar approach by using pass-through pipeline doing that action at the
> input port. For that, define mask (00000000FFFFFFFF)  and offset fields for
> extracting the vlan-tag from the packet in pass-through pipeline and store
> at the desired offset in the headroom and  prepend the vlan tag  stored in
> the metadata with port id read from mbuf.  In flow-classification pipeline,
> you can specify the headroom offset and mask to read the final key
> (portid+vlan tag) stored in the packet-metadata for classification.
> Thanks for your reply and help.
> Regards,
> Nidhia Varghese


Nidhia Varghese

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